This document outlines the objectives and content of a system administration and maintenance course. The course aims to transition students from working individually to managing an entire IT infrastructure. It will cover topics like managing and configuring servers, using tools to manage computers and users, and disaster recovery. Students will learn about system administration roles and responsibilities, different types of administrators, operating systems used for administration like Windows and Linux, and client-server vs peer-to-peer models. Evaluation will include attendance, homework, exams and labs.
The document provides an introduction to system administration, including defining system administration as the management of computers, hardware, software, operating systems, applications, networks, and users. It describes the duties of a system administrator such as applying updates, installing/configuring hardware/software, managing user accounts, performing backups and security tasks. The document also discusses different types of administrators including database, network, security, and web administrators. It provides an overview of common operating systems used for administration like Windows, Unix, Linux distributions.
The document provides an introduction to system administration, including defining system administration as the management of computers, hardware, software, operating systems, applications, networks, and users within an organization. It describes the duties of a system administrator such as applying updates, installing/configuring hardware/software, managing user accounts, performing backups and security audits. The document also differentiates between types of administrators like database, network, security and web administrators. Finally, it provides a brief history of commonly used operating systems for administration like Windows and Unix variants.
The document provides an introduction to system administration. It discusses what system administration entails, including managing computers, hardware, software, operating systems, applications, networks, and users. It outlines the duties of a system administrator, such as applying updates, installing/configuring hardware/software, managing user accounts, performing backups and troubleshooting issues. It also describes the duties of a datacenter engineer, which involves server installation, monitoring, maintenance and issue resolution. The document discusses different types of administrators and users as well as operating systems that support system administration like Windows, Unix and Linux.
Introduction to Network and System AdministrationDuressa Teshome
The document provides an overview of computer networks and system administration. It defines what a computer network is and describes different types of networks including WANs, LANs, peer-to-peer networks, and the internet. It also discusses servers, switches, hubs and the roles and responsibilities of a system administrator. Key aspects of system administration include automating tasks, documenting all changes, communicating with users, securing systems, and planning for expected and unexpected issues.
Here are the basic steps to troubleshoot a Windows-based service issue:
1. Open the Services Manager (Start > Run > services.msc) and check the status of the service - if it is stopped or stuck in stopping/starting.
2. Note any error messages when the service fails to start.
3. Check the service properties, especially the Dependencies tab, to ensure the services it depends on are running.
4. Review the System Logs for any errors or additional details on why the service failed to start.
A Survey On Operating System Challenges And Security Issues Associate To ItMichele Thomas
This document discusses operating system challenges and security issues. It begins with an introduction to operating systems and their role in managing computer hardware resources. It then describes four main types of operating systems: batch, time-sharing, distributed, and real-time. The document outlines the operating system's role in memory management and discusses some key security challenges like unauthorized access, Trojan horses, and program threats. It concludes by stating that optimizing operating system performance is important as hardware becomes more complex, and more research is needed to address challenges in developing secure and reliable operating systems.
04 software system and application software - copy - copyAfrodisius Mathayo
The document discusses principles of information systems including software functions. It defines systems software, application software, and operating systems. It describes popular operating systems like Windows, Mac OS X, and Linux and how they support personal, workgroup and enterprise goals. It also discusses programming languages, application software types, and software issues like bugs, licensing and support.
The document discusses key concepts about software, including the differences between systems software and application software, popular operating systems, programming languages, and software issues. It covers how operating systems control hardware and interface with applications, defines software types like proprietary and open-source, and examines trends such as global software support.
The document provides an introduction to system administration, including defining system administration as the management of computers, hardware, software, operating systems, applications, networks, and users. It describes the duties of a system administrator such as applying updates, installing/configuring hardware/software, managing user accounts, performing backups and security tasks. The document also discusses different types of administrators including database, network, security, and web administrators. It provides an overview of common operating systems used for administration like Windows, Unix, Linux distributions.
The document provides an introduction to system administration, including defining system administration as the management of computers, hardware, software, operating systems, applications, networks, and users within an organization. It describes the duties of a system administrator such as applying updates, installing/configuring hardware/software, managing user accounts, performing backups and security audits. The document also differentiates between types of administrators like database, network, security and web administrators. Finally, it provides a brief history of commonly used operating systems for administration like Windows and Unix variants.
The document provides an introduction to system administration. It discusses what system administration entails, including managing computers, hardware, software, operating systems, applications, networks, and users. It outlines the duties of a system administrator, such as applying updates, installing/configuring hardware/software, managing user accounts, performing backups and troubleshooting issues. It also describes the duties of a datacenter engineer, which involves server installation, monitoring, maintenance and issue resolution. The document discusses different types of administrators and users as well as operating systems that support system administration like Windows, Unix and Linux.
Introduction to Network and System AdministrationDuressa Teshome
The document provides an overview of computer networks and system administration. It defines what a computer network is and describes different types of networks including WANs, LANs, peer-to-peer networks, and the internet. It also discusses servers, switches, hubs and the roles and responsibilities of a system administrator. Key aspects of system administration include automating tasks, documenting all changes, communicating with users, securing systems, and planning for expected and unexpected issues.
Here are the basic steps to troubleshoot a Windows-based service issue:
1. Open the Services Manager (Start > Run > services.msc) and check the status of the service - if it is stopped or stuck in stopping/starting.
2. Note any error messages when the service fails to start.
3. Check the service properties, especially the Dependencies tab, to ensure the services it depends on are running.
4. Review the System Logs for any errors or additional details on why the service failed to start.
A Survey On Operating System Challenges And Security Issues Associate To ItMichele Thomas
This document discusses operating system challenges and security issues. It begins with an introduction to operating systems and their role in managing computer hardware resources. It then describes four main types of operating systems: batch, time-sharing, distributed, and real-time. The document outlines the operating system's role in memory management and discusses some key security challenges like unauthorized access, Trojan horses, and program threats. It concludes by stating that optimizing operating system performance is important as hardware becomes more complex, and more research is needed to address challenges in developing secure and reliable operating systems.
04 software system and application software - copy - copyAfrodisius Mathayo
The document discusses principles of information systems including software functions. It defines systems software, application software, and operating systems. It describes popular operating systems like Windows, Mac OS X, and Linux and how they support personal, workgroup and enterprise goals. It also discusses programming languages, application software types, and software issues like bugs, licensing and support.
The document discusses key concepts about software, including the differences between systems software and application software, popular operating systems, programming languages, and software issues. It covers how operating systems control hardware and interface with applications, defines software types like proprietary and open-source, and examines trends such as global software support.
The document discusses system software, including operating systems and utility programs. It begins by explaining the differences between system software and application software. It then describes the functions of operating systems such as interfacing with users, booting the computer, configuring devices, managing resources and jobs, file management, security, and increasing efficiency through techniques like multitasking. Popular desktop operating systems like Windows, Mac OS, Linux, and mobile operating systems are also outlined. The document concludes by describing the roles of various utility programs that perform tasks like file management, searching, and disk management.
The document discusses system software, including operating systems and utility programs. It describes the functions of operating systems such as interfacing with users, booting computers, managing devices and resources, and providing security. Popular operating systems mentioned include Windows, Mac OS, Linux, Android, and iOS. Utility programs are also discussed, including file management programs, backup and restore utilities, disk management, and search tools.
System administration involves tasks like maintaining computer systems and networks, setting up user accounts, monitoring performance and security, updating software, and troubleshooting issues. It requires broad technical knowledge as well as skills in areas like communication, problem solving, and planning for future needs of systems and users. While computer systems and the roles of system administrators have become more complex over time, the core goals remain ensuring systems and networks are operational, secure, and meeting the needs of users.
The document provides an overview of advanced operating systems. It discusses synchronization mechanisms like processes, threads, and the critical section problem. It also covers other synchronization issues like the dining philosophers problem and producer-consumer problem. Distributed operating systems and multiprocessing operating systems are presented as types of advanced operating systems. Design approaches like layered, kernel, and virtual machine approaches are summarized. Semaphores are introduced as a synchronization mechanism using wait and signal operations.
This document discusses various applications of computers across different domains:
1. Office automation applications include using computers for routine clerical tasks in organizations through word processing, spreadsheets, databases, email and accessing files over networks.
2. Management applications use computers for tasks like stock control, accounting, marketing and sales analysis to provide timely, accurate information for decision making.
3. Scientific, engineering and research applications employ computers for complex calculations, simulations, modeling, data analysis and knowledge discovery across various domains like science, engineering, medicine and other research areas. Standard application packages are available for common tasks to improve efficiency.
The document provides an overview of operating systems including:
1. It defines an operating system as a program that acts as an intermediary between users/applications and computer hardware.
2. It describes the basic components of a computer system including hardware, operating system, application programs, and users.
3. It discusses the functions of an operating system including process management, memory management, file management, and more.
4. It outlines different types of operating systems such as batch, time-sharing, real-time, distributed, and mobile operating systems.
The document provides an overview of computer systems, including their key parts, software, operating systems, hardware, and classifications. It discusses how a computer system consists of software, hardware, data, and users. The main parts are software, which includes operating systems and applications, and hardware, which are the physical components. Operating systems manage resources, tasks, security, and provide user interfaces and file management. Hardware processes and stores data. Computers today come in various classifications.
Chapter 9 The People in Information Systems Learning Ob.docxspoonerneddy
Chapter 9: The People in
Information Systems
Learning Objectives
Upon successful completion of this chapter, you will be
able to:
• describe each of the different roles that people play
in the design, development, and use of information
systems;
• understand the different career paths available to
those who work with information systems;
• explain the importance of where the information-
systems function is placed in an organization; and
• describe the different types of users of information
systems.
Introduction
The opening chapters of this text focused on the technology behind
information systems, namely hardware, software, data, and
networking. The last chapter covered business processes and the
Chapter 9: The People in Information
Systems | 189
U. S. Bureau
of Labor
Statistics –
2020
Projections
key role they can play in the success of a business. This chapter
discusses people, the last component of an information system.
People are involved in information systems in just about every
way. People imagine information systems, people develop
information systems, people support information systems, and,
perhaps most importantly, people use information systems.
The Creators of Information Systems
The first group of people to be considered play a role in designing,
developing, and building information systems. These people are
generally technical and have a background in programming,
analysis, information security, or database design. Just about
everyone who works in the creation of information systems has a
minimum of a bachelor’s degree in computer science or information
systems, though that is not necessarily a requirement. The process
of creating information systems will be covered in more detail in
Chapter 10.
The following chart shows the U. S. Bureau of Labor Statistics
projections for computing career employment in 2020.
190 | Information Systems for Business and Beyond (2019)
Systems Analyst
The systems analyst straddles the divide between identifying
business needs and imagining a new or redesigned system to fulfill
those needs. This individual works with a team or department
seeking to identify business requirements and analyze the specific
details of an existing system or a system that needs to be built.
Generally, the analyst is required to have a good understanding
of the business itself, the purpose of the business, the business
processes involved, and the ability to document them well. The
analyst identifies the different stakeholders in the system and works
to involve the appropriate individuals in the analysis process.
Prior to analyzing the problem or the system of concern, the
analyst needs to a) clearly identify the problem, b) gain approval for
the project, c) identify the stakeholders, and d) develop a plan to
monitor the project. The analysis phase of the project can be broken
down into five steps.
1. Se.
Chapter 9 The People in Information Systems Learning Ob.docxtiffanyd4
Chapter 9: The People in
Information Systems
Learning Objectives
Upon successful completion of this chapter, you will be
able to:
• describe each of the different roles that people play
in the design, development, and use of information
systems;
• understand the different career paths available to
those who work with information systems;
• explain the importance of where the information-
systems function is placed in an organization; and
• describe the different types of users of information
systems.
Introduction
The opening chapters of this text focused on the technology behind
information systems, namely hardware, software, data, and
networking. The last chapter covered business processes and the
Chapter 9: The People in Information
Systems | 189
U. S. Bureau
of Labor
Statistics –
2020
Projections
key role they can play in the success of a business. This chapter
discusses people, the last component of an information system.
People are involved in information systems in just about every
way. People imagine information systems, people develop
information systems, people support information systems, and,
perhaps most importantly, people use information systems.
The Creators of Information Systems
The first group of people to be considered play a role in designing,
developing, and building information systems. These people are
generally technical and have a background in programming,
analysis, information security, or database design. Just about
everyone who works in the creation of information systems has a
minimum of a bachelor’s degree in computer science or information
systems, though that is not necessarily a requirement. The process
of creating information systems will be covered in more detail in
Chapter 10.
The following chart shows the U. S. Bureau of Labor Statistics
projections for computing career employment in 2020.
190 | Information Systems for Business and Beyond (2019)
Systems Analyst
The systems analyst straddles the divide between identifying
business needs and imagining a new or redesigned system to fulfill
those needs. This individual works with a team or department
seeking to identify business requirements and analyze the specific
details of an existing system or a system that needs to be built.
Generally, the analyst is required to have a good understanding
of the business itself, the purpose of the business, the business
processes involved, and the ability to document them well. The
analyst identifies the different stakeholders in the system and works
to involve the appropriate individuals in the analysis process.
Prior to analyzing the problem or the system of concern, the
analyst needs to a) clearly identify the problem, b) gain approval for
the project, c) identify the stakeholders, and d) develop a plan to
monitor the project. The analysis phase of the project can be broken
down into five steps.
1. Se.
Understanding the Windows Server Administration Fundamentals (Part-1)Tuan Yang
Windows Server Administration is an advanced computer networking topic that includes server installation and configuration, server roles, storage, Active Directory and Group Policy, file, print, and web services, remote access, virtualization, application servers, troubleshooting, performance, and reliability.
Learn more about:
» What is the Server?
» Server Roles.
» Server Hardware.
» Work groups & Domains.
» Device and printers.
» Windows Server OS Management tools.
A computer is an electronic machine that stores, retrieves and manipulates data based on instructions given in programs. It has four main components - hardware, software, humanware and procedures. Hardware refers to the physical machines that perform the basic functions of input, processing and output in the data processing cycle. Software includes system software like operating systems and application software for specific tasks. Humanware are the people who design, program and operate computers. Procedures define how a computer installation performs functions and handles issues. The document provides an introduction to basic computer concepts.
The document discusses the functions and history of computer operating systems. It covers the main goals of an operating system which are to execute user programs, make problem solving easier for users, and efficiently use computer hardware. The document then summarizes the evolution of major operating systems from the 1940s to present day, including the development of graphical user interfaces, networks, and more user-friendly features. It also outlines the main functions of an operating system like starting up the computer, managing memory, scheduling jobs, and providing a user interface.
This document discusses network design and management. It covers the systems development life cycle (SDLC) which involves planning, analysis, design, implementation, and maintenance phases. It also discusses network modeling, feasibility studies, capacity planning, creating a baseline, skills needed for a network manager, and generating useful statistics.
This document provides an overview of systems analysis and design. It discusses key concepts including:
1. Systems analysis involves collecting and interpreting facts to identify problems and decompose a system into components. Design focuses on planning how to accomplish system objectives.
2. A system has components, interrelated components, a boundary, purpose, environment, interfaces, constraints, inputs, and outputs. Characteristics are discussed.
3. Models used in analysis include schematic, flow, static, and dynamic models. Important concepts are decomposition, modularity, coupling, and cohesion. Open and closed systems are also covered.
This document outlines the objectives and content of a lecture on operating systems and utility programs. The lecture will identify different types of system software, explain the purpose of utilities included with most operating systems, summarize features of standalone operating systems, identify devices that use embedded operating systems, and explain standalone utility programs. It will also describe the functions of an operating system, including booting, user interfaces, multitasking, memory management, performance monitoring, job scheduling, drivers, and network connectivity. Finally, the lecture will cover utility programs, types of operating systems, and standalone utility programs like file compression utilities and media players.
Introduction to Operating Systems - Mary MargaratMary Margarat
The document provides an overview of operating systems, including:
- It describes the main components and functions of an operating system like process management, memory management, and file management.
- It discusses different types of operating systems such as batch, multi-tasking, distributed, and real-time operating systems.
- It outlines some key services provided by operating systems like file system management, program execution, input/output operations, and security/protection.
The document discusses different types of operating systems including desktop, departmental, and enterprise operating systems. It describes the key functions of an operating system as acting as an intermediary between the user and computer hardware to provide an efficient environment to run programs. Examples are given of different categories of operating systems based on the number of users supported and level of sophistication, including desktop systems for single users, departmental systems for dozens to hundreds of users, and enterprise systems for thousands of users.
This document discusses operating systems and provides details on various topics including processes, threads, computer system structures, and types of operating systems. It defines what an operating system is and its role in managing computer hardware and resources. It also describes different types of operating systems including mainframe systems, desktop systems, real-time systems, and handheld systems. The document discusses concepts like processes, threads, multiprocessing, distributed systems, and client-server models.
The document provides an overview of operating system concepts and functions. It discusses that an operating system manages computer hardware resources and provides common services for computer programs. It then describes some key functions of an operating system including memory management, processor management, device management, file management, and other services like security and error detection. The document also covers different types of operating systems such as batch, time-sharing, distributed, network, and real-time operating systems.
Null Bangalore | Pentesters Approach to AWS IAMDivyanshu
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
The document discusses system software, including operating systems and utility programs. It begins by explaining the differences between system software and application software. It then describes the functions of operating systems such as interfacing with users, booting the computer, configuring devices, managing resources and jobs, file management, security, and increasing efficiency through techniques like multitasking. Popular desktop operating systems like Windows, Mac OS, Linux, and mobile operating systems are also outlined. The document concludes by describing the roles of various utility programs that perform tasks like file management, searching, and disk management.
The document discusses system software, including operating systems and utility programs. It describes the functions of operating systems such as interfacing with users, booting computers, managing devices and resources, and providing security. Popular operating systems mentioned include Windows, Mac OS, Linux, Android, and iOS. Utility programs are also discussed, including file management programs, backup and restore utilities, disk management, and search tools.
System administration involves tasks like maintaining computer systems and networks, setting up user accounts, monitoring performance and security, updating software, and troubleshooting issues. It requires broad technical knowledge as well as skills in areas like communication, problem solving, and planning for future needs of systems and users. While computer systems and the roles of system administrators have become more complex over time, the core goals remain ensuring systems and networks are operational, secure, and meeting the needs of users.
The document provides an overview of advanced operating systems. It discusses synchronization mechanisms like processes, threads, and the critical section problem. It also covers other synchronization issues like the dining philosophers problem and producer-consumer problem. Distributed operating systems and multiprocessing operating systems are presented as types of advanced operating systems. Design approaches like layered, kernel, and virtual machine approaches are summarized. Semaphores are introduced as a synchronization mechanism using wait and signal operations.
This document discusses various applications of computers across different domains:
1. Office automation applications include using computers for routine clerical tasks in organizations through word processing, spreadsheets, databases, email and accessing files over networks.
2. Management applications use computers for tasks like stock control, accounting, marketing and sales analysis to provide timely, accurate information for decision making.
3. Scientific, engineering and research applications employ computers for complex calculations, simulations, modeling, data analysis and knowledge discovery across various domains like science, engineering, medicine and other research areas. Standard application packages are available for common tasks to improve efficiency.
The document provides an overview of operating systems including:
1. It defines an operating system as a program that acts as an intermediary between users/applications and computer hardware.
2. It describes the basic components of a computer system including hardware, operating system, application programs, and users.
3. It discusses the functions of an operating system including process management, memory management, file management, and more.
4. It outlines different types of operating systems such as batch, time-sharing, real-time, distributed, and mobile operating systems.
The document provides an overview of computer systems, including their key parts, software, operating systems, hardware, and classifications. It discusses how a computer system consists of software, hardware, data, and users. The main parts are software, which includes operating systems and applications, and hardware, which are the physical components. Operating systems manage resources, tasks, security, and provide user interfaces and file management. Hardware processes and stores data. Computers today come in various classifications.
Chapter 9 The People in Information Systems Learning Ob.docxspoonerneddy
Chapter 9: The People in
Information Systems
Learning Objectives
Upon successful completion of this chapter, you will be
able to:
• describe each of the different roles that people play
in the design, development, and use of information
systems;
• understand the different career paths available to
those who work with information systems;
• explain the importance of where the information-
systems function is placed in an organization; and
• describe the different types of users of information
systems.
Introduction
The opening chapters of this text focused on the technology behind
information systems, namely hardware, software, data, and
networking. The last chapter covered business processes and the
Chapter 9: The People in Information
Systems | 189
U. S. Bureau
of Labor
Statistics –
2020
Projections
key role they can play in the success of a business. This chapter
discusses people, the last component of an information system.
People are involved in information systems in just about every
way. People imagine information systems, people develop
information systems, people support information systems, and,
perhaps most importantly, people use information systems.
The Creators of Information Systems
The first group of people to be considered play a role in designing,
developing, and building information systems. These people are
generally technical and have a background in programming,
analysis, information security, or database design. Just about
everyone who works in the creation of information systems has a
minimum of a bachelor’s degree in computer science or information
systems, though that is not necessarily a requirement. The process
of creating information systems will be covered in more detail in
Chapter 10.
The following chart shows the U. S. Bureau of Labor Statistics
projections for computing career employment in 2020.
190 | Information Systems for Business and Beyond (2019)
Systems Analyst
The systems analyst straddles the divide between identifying
business needs and imagining a new or redesigned system to fulfill
those needs. This individual works with a team or department
seeking to identify business requirements and analyze the specific
details of an existing system or a system that needs to be built.
Generally, the analyst is required to have a good understanding
of the business itself, the purpose of the business, the business
processes involved, and the ability to document them well. The
analyst identifies the different stakeholders in the system and works
to involve the appropriate individuals in the analysis process.
Prior to analyzing the problem or the system of concern, the
analyst needs to a) clearly identify the problem, b) gain approval for
the project, c) identify the stakeholders, and d) develop a plan to
monitor the project. The analysis phase of the project can be broken
down into five steps.
1. Se.
Chapter 9 The People in Information Systems Learning Ob.docxtiffanyd4
Chapter 9: The People in
Information Systems
Learning Objectives
Upon successful completion of this chapter, you will be
able to:
• describe each of the different roles that people play
in the design, development, and use of information
systems;
• understand the different career paths available to
those who work with information systems;
• explain the importance of where the information-
systems function is placed in an organization; and
• describe the different types of users of information
systems.
Introduction
The opening chapters of this text focused on the technology behind
information systems, namely hardware, software, data, and
networking. The last chapter covered business processes and the
Chapter 9: The People in Information
Systems | 189
U. S. Bureau
of Labor
Statistics –
2020
Projections
key role they can play in the success of a business. This chapter
discusses people, the last component of an information system.
People are involved in information systems in just about every
way. People imagine information systems, people develop
information systems, people support information systems, and,
perhaps most importantly, people use information systems.
The Creators of Information Systems
The first group of people to be considered play a role in designing,
developing, and building information systems. These people are
generally technical and have a background in programming,
analysis, information security, or database design. Just about
everyone who works in the creation of information systems has a
minimum of a bachelor’s degree in computer science or information
systems, though that is not necessarily a requirement. The process
of creating information systems will be covered in more detail in
Chapter 10.
The following chart shows the U. S. Bureau of Labor Statistics
projections for computing career employment in 2020.
190 | Information Systems for Business and Beyond (2019)
Systems Analyst
The systems analyst straddles the divide between identifying
business needs and imagining a new or redesigned system to fulfill
those needs. This individual works with a team or department
seeking to identify business requirements and analyze the specific
details of an existing system or a system that needs to be built.
Generally, the analyst is required to have a good understanding
of the business itself, the purpose of the business, the business
processes involved, and the ability to document them well. The
analyst identifies the different stakeholders in the system and works
to involve the appropriate individuals in the analysis process.
Prior to analyzing the problem or the system of concern, the
analyst needs to a) clearly identify the problem, b) gain approval for
the project, c) identify the stakeholders, and d) develop a plan to
monitor the project. The analysis phase of the project can be broken
down into five steps.
1. Se.
Understanding the Windows Server Administration Fundamentals (Part-1)Tuan Yang
Windows Server Administration is an advanced computer networking topic that includes server installation and configuration, server roles, storage, Active Directory and Group Policy, file, print, and web services, remote access, virtualization, application servers, troubleshooting, performance, and reliability.
Learn more about:
» What is the Server?
» Server Roles.
» Server Hardware.
» Work groups & Domains.
» Device and printers.
» Windows Server OS Management tools.
A computer is an electronic machine that stores, retrieves and manipulates data based on instructions given in programs. It has four main components - hardware, software, humanware and procedures. Hardware refers to the physical machines that perform the basic functions of input, processing and output in the data processing cycle. Software includes system software like operating systems and application software for specific tasks. Humanware are the people who design, program and operate computers. Procedures define how a computer installation performs functions and handles issues. The document provides an introduction to basic computer concepts.
The document discusses the functions and history of computer operating systems. It covers the main goals of an operating system which are to execute user programs, make problem solving easier for users, and efficiently use computer hardware. The document then summarizes the evolution of major operating systems from the 1940s to present day, including the development of graphical user interfaces, networks, and more user-friendly features. It also outlines the main functions of an operating system like starting up the computer, managing memory, scheduling jobs, and providing a user interface.
This document discusses network design and management. It covers the systems development life cycle (SDLC) which involves planning, analysis, design, implementation, and maintenance phases. It also discusses network modeling, feasibility studies, capacity planning, creating a baseline, skills needed for a network manager, and generating useful statistics.
This document provides an overview of systems analysis and design. It discusses key concepts including:
1. Systems analysis involves collecting and interpreting facts to identify problems and decompose a system into components. Design focuses on planning how to accomplish system objectives.
2. A system has components, interrelated components, a boundary, purpose, environment, interfaces, constraints, inputs, and outputs. Characteristics are discussed.
3. Models used in analysis include schematic, flow, static, and dynamic models. Important concepts are decomposition, modularity, coupling, and cohesion. Open and closed systems are also covered.
This document outlines the objectives and content of a lecture on operating systems and utility programs. The lecture will identify different types of system software, explain the purpose of utilities included with most operating systems, summarize features of standalone operating systems, identify devices that use embedded operating systems, and explain standalone utility programs. It will also describe the functions of an operating system, including booting, user interfaces, multitasking, memory management, performance monitoring, job scheduling, drivers, and network connectivity. Finally, the lecture will cover utility programs, types of operating systems, and standalone utility programs like file compression utilities and media players.
Introduction to Operating Systems - Mary MargaratMary Margarat
The document provides an overview of operating systems, including:
- It describes the main components and functions of an operating system like process management, memory management, and file management.
- It discusses different types of operating systems such as batch, multi-tasking, distributed, and real-time operating systems.
- It outlines some key services provided by operating systems like file system management, program execution, input/output operations, and security/protection.
The document discusses different types of operating systems including desktop, departmental, and enterprise operating systems. It describes the key functions of an operating system as acting as an intermediary between the user and computer hardware to provide an efficient environment to run programs. Examples are given of different categories of operating systems based on the number of users supported and level of sophistication, including desktop systems for single users, departmental systems for dozens to hundreds of users, and enterprise systems for thousands of users.
This document discusses operating systems and provides details on various topics including processes, threads, computer system structures, and types of operating systems. It defines what an operating system is and its role in managing computer hardware and resources. It also describes different types of operating systems including mainframe systems, desktop systems, real-time systems, and handheld systems. The document discusses concepts like processes, threads, multiprocessing, distributed systems, and client-server models.
The document provides an overview of operating system concepts and functions. It discusses that an operating system manages computer hardware resources and provides common services for computer programs. It then describes some key functions of an operating system including memory management, processor management, device management, file management, and other services like security and error detection. The document also covers different types of operating systems such as batch, time-sharing, distributed, network, and real-time operating systems.
Null Bangalore | Pentesters Approach to AWS IAMDivyanshu
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELijaia
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
Use PyCharm for remote debugging of WSL on a Windo cf5c162d672e4e58b4dde5d797...shadow0702a
This document serves as a comprehensive step-by-step guide on how to effectively use PyCharm for remote debugging of the Windows Subsystem for Linux (WSL) on a local Windows machine. It meticulously outlines several critical steps in the process, starting with the crucial task of enabling permissions, followed by the installation and configuration of WSL.
The guide then proceeds to explain how to set up the SSH service within the WSL environment, an integral part of the process. Alongside this, it also provides detailed instructions on how to modify the inbound rules of the Windows firewall to facilitate the process, ensuring that there are no connectivity issues that could potentially hinder the debugging process.
The document further emphasizes on the importance of checking the connection between the Windows and WSL environments, providing instructions on how to ensure that the connection is optimal and ready for remote debugging.
It also offers an in-depth guide on how to configure the WSL interpreter and files within the PyCharm environment. This is essential for ensuring that the debugging process is set up correctly and that the program can be run effectively within the WSL terminal.
Additionally, the document provides guidance on how to set up breakpoints for debugging, a fundamental aspect of the debugging process which allows the developer to stop the execution of their code at certain points and inspect their program at those stages.
Finally, the document concludes by providing a link to a reference blog. This blog offers additional information and guidance on configuring the remote Python interpreter in PyCharm, providing the reader with a well-rounded understanding of the process.
VARIABLE FREQUENCY DRIVE. VFDs are widely used in industrial applications for...PIMR BHOPAL
Variable frequency drive .A Variable Frequency Drive (VFD) is an electronic device used to control the speed and torque of an electric motor by varying the frequency and voltage of its power supply. VFDs are widely used in industrial applications for motor control, providing significant energy savings and precise motor operation.
Prediction of Electrical Energy Efficiency Using Information on Consumer's Ac...PriyankaKilaniya
Energy efficiency has been important since the latter part of the last century. The main object of this survey is to determine the energy efficiency knowledge among consumers. Two separate districts in Bangladesh are selected to conduct the survey on households and showrooms about the energy and seller also. The survey uses the data to find some regression equations from which it is easy to predict energy efficiency knowledge. The data is analyzed and calculated based on five important criteria. The initial target was to find some factors that help predict a person's energy efficiency knowledge. From the survey, it is found that the energy efficiency awareness among the people of our country is very low. Relationships between household energy use behaviors are estimated using a unique dataset of about 40 households and 20 showrooms in Bangladesh's Chapainawabganj and Bagerhat districts. Knowledge of energy consumption and energy efficiency technology options is found to be associated with household use of energy conservation practices. Household characteristics also influence household energy use behavior. Younger household cohorts are more likely to adopt energy-efficient technologies and energy conservation practices and place primary importance on energy saving for environmental reasons. Education also influences attitudes toward energy conservation in Bangladesh. Low-education households indicate they primarily save electricity for the environment while high-education households indicate they are motivated by environmental concerns.
Build the Next Generation of Apps with the Einstein 1 Platform.
Rejoignez Philippe Ozil pour une session de workshops qui vous guidera à travers les détails de la plateforme Einstein 1, l'importance des données pour la création d'applications d'intelligence artificielle et les différents outils et technologies que Salesforce propose pour vous apporter tous les bénéfices de l'IA.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
SAM_Lecture_One.pptx
1. System Administration and Maintenance ( Lecture One ) 1
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System Administration
&
Maintenance
Dr. Ahmed Alnasheri 11/20/2022
The basics of system administration
2. System Administration and Maintenance ( Lecture One ) 2
Course Objectives
1. Transition you from working on a single computer to an entire fleet.
2. You’ll learn about the infrastructure services.
3. We’ll deep dive on cloud.
4. You'll also learn how to:
• Manage and
• Configure servers.
5. Using industry tools to manage :
• Computers,
• User information, and
• User productivity
6. Finally, you’ll learn how to recover your organization’s IT infrastructure
in the event of a disaster.
7. In lab session you will use WS 2016
3. System Administration and Maintenance ( Lecture One ) 3
Course References
1. Principles of network and system administration / Mark
Burgess.
2. The Practice of System and Network, Second Edition,
Thomas A. Limoncelli Christina J. Hogan Strata R. Chalup.
3. Administration Installation, Storage, and Compute with
Windows Server 2016.
4. Networking with Windows Server 2016.
5. Identity with Windows Server 2016.
4. System Administration and Maintenance ( Lecture One ) 4
Evaluation
Evaluation
No. Assessment Tasks Mark Proportion of Final Assessment
1 Attendance & HomeWorks 10 10%
3 Midterm Exam 20 20%
4 Labs 20 20%
5 Final Exam 50 50%
Total 100 100%
5. System Administration and Maintenance ( Lecture One ) 5
Lecture Objectives
• Examine the roles and responsibilities of a Systems Administrator.
• Differentiate the technical differences between a server and a client machine.
• Introduce you to cloud ( Search about cloud )
6. System Administration and Maintenance ( Lecture One ) 6
What is Systems?
• System refer to both to operating system of computer, collectively the set of
computers that cooperate in a network.
• Def 1 : human – computer system : an organized collaboration between
human and computer to solve a problem or provide a service.
• Term operating systems has no rigorously accepted definition. Its often
thought of as the collection of all programs bundled with a computer,
combining kernel of basic services and utilities for users Principles of
Networking & System Administration
7. System Administration and Maintenance ( Lecture One ) 7
What is Systems Administration?
• Employees need computers along with access to the Internet to reach out to clients
• The organization websites needs to be up and running.
• Firewall have to be shared back and forth and so much more
• All of these requirements make up the IT infrastructure of an organization.
8. System Administration and Maintenance ( Lecture One ) 8
What is Systems Administration?
• IT infrastructure encompasses the software, the hardware, network, and services required for
an organization to operate in an enterprise IT environment.
• Without an IT infrastructure, employees wouldn't be able to do their jobs and the whole
company will crumble before it even get started.
• So organizations employ the help of someone like a systems administrator to manage the
company's IT infrastructure.
• System administrators or as we like to call them sysadmins, are the unsung heroes in
organization.
• They work in the background to make sure a company's IT infrastructure is always working,
constantly fighting to prevent IT disasters from happening.
• In all seriousness, sysadmins have a lot of different responsibilities. Any company that has an
IT presence needs a sysadmin or someone who handles those responsibilities.
• The role of a sysadmin can vary depending on the size of an organization.
• As an organization gets bigger, you need teams of sysadmins.
• Their responsibilities may be separated out into different roles with job titles like network
administrators and database administrators.
9. System Administration and Maintenance ( Lecture One ) 9
What is Systems Administration?
•What is System Administration ?
The field in IT that is responsible for maintaining reliable computer
systems in multiuser environment.
•What is System Administrator ?
Is the person who manages all of these infrastructures, he has lot of
different of responsibilities.
The role of sysadmin can vary depends on the size of an organization.
When the organization get bigger, it needs team of sysadmins with
different roles:
1) Network administrators
2) Database administrators
Basically, a sysadmin is responsible for their company’s IT services.
10. System Administration and Maintenance ( Lecture One ) 10
What is Systems Administration?
The subject matter of systems
administration includes computer
systems and the ways people use
them in an organization.
This entails a knowledge of OS
and applications, as well as HW
and SW troubleshooting, but also
knowledge of the purposes for
which people in the organization
use the computers
11. System Administration and Maintenance ( Lecture One ) 11
Duties of a System Administrator
• A system administrator's responsibilities might include:
Applying operating system updates, patches, and configuration
changes.
Installing and configuring new hardware and software.
Adding, removing, or updating user account information, resetting
passwords, etc.
System performance tuning.
Responsibility for documenting the configuration of the system.
Responsibility for security.
Performing routine audits of systems and software.
Performing backups.
12. System Administration and Maintenance ( Lecture One ) 12
Duties of a System Administrator
Analyzing system logs and identifying potential issues with
computer systems.
Troubleshooting any reported problems.
Introducing and integrating new technologies into existing data
center environments.
Answering technical queries.
Insuring that the network infrastructure is up and running
14. System Administration and Maintenance ( Lecture One ) 14
Challenges of SA
Not just installing system/software, also about planning and
designing an efficient community of computers.
Design a logical and efficient network.
Easy upgrade for a large number of computers.
Decide what and where services are installed.
Plan and implement security.
Provide a comfortable environment for users.
Develop ways of fixing problems and errors.
Keep track of new technology and software.
15. System Administration and Maintenance ( Lecture One ) 15
Types of Administrators/Users
•In a larger company, following may all be separate positions within a
computer support or Information Services (IS) department.
•In a smaller group they may be shared by a few sysadmins, or even a
single person.
Database Administrator
Network Administrator
Security Administrator
Web Administrator
Technical support
computer operator
16. System Administration and Maintenance ( Lecture One ) 16
Types of Administrators/Users
A database administrator (DBA) maintains a database system, and
is responsible for the integrity of the data and the efficiency and
performance of the system.
A network administrator maintains network infrastructure such as
switches and routers, and diagnoses problems with these or with
the behavior of network-attached computers.
A security administrator is a specialist in computer and network
security, including the administration of security devices such as
firewalls, as well as consulting on general security measures.
17. System Administration and Maintenance ( Lecture One ) 17
Types of Administrators/Users
A web administrator maintains web server services (such as IIS or
Apache) that allow for internal or external access to web sites. Tasks
include managing multiple sites, administering security, and
configuring necessary components and software. Responsibilities
may also include software change management.
Technical support staff respond to individual users' difficulties with
computer systems, provide instructions and sometimes training,
and diagnose and solve common problems.
A computer operator performs routine maintenance and upkeep,
such as changing backup tapes or replacing failed
18. System Administration and Maintenance ( Lecture One ) 18
OS Supporting Administration
• Microsoft Windows : 1975 - Formed
1980 - Xenix released by Microsoft
1981 - MS-DOS 1.0 released with new IBM PC
1985 - Windows 1.0 released
1987-1990 – Windows 2.0 to 2.11 released
1990 - Windows 3.1 released
1993 - Windows NT 3.1 released (over 6 million lines of code)
1995 - Windows 95 released
1998-2000 - Windows 98, 2000, ME
2001 – 2005 - release of windows XP
2006-2008 – Windows Vista
2009-2011 – Windows 7
2012-2013 – Windows 8
2013 – Windows 8.1
19. System Administration and Maintenance ( Lecture One ) 19
OS Supporting Administration
• UNIX
1980 - Xenix released by Microsoft
Early 70s --> AT&T System V Unix (and C developed)--> BSD Unix (U. Cal-Berkley)
Today - many variants. Portable and Scalable.
1) HP - HP/UX
2) IBM - AIX
3) Silicon Graphics - Irix
4) Sun Microsystems - SunOS/Solaris
For history see: http://www.sun.com/aboutsun/coinfo/history.html
1982 - Sun Microsystems founded.
PC Based Unix - Solaris, SCO Unix, FreeBSD, NetBSD
Linux - Linus Torvalds (Finland) 1991. Free/Open.
(Red Hat Linux – Commercial Version)
20. System Administration and Maintenance ( Lecture One ) 20
Top 10 Linux operating systems
Linux Mint
Ubuntu
Debian
Mageia
Fedora
Open SUSE
PC Linus OS
Manjaro
Arch
Puppy
21. System Administration and Maintenance ( Lecture One ) 21
Servers Revisited
Client/Server Model
Microcomputer users, or
clients, share services of
a centralized computer
called a server.
Computers share equally
with one another without
having to rely on a
central server.
Peer-to-Peer Model
22. System Administration and Maintenance ( Lecture One ) 22
Client/Server vs. Peer-to-Peer
Pros and Cons
Advantages:
Very secure OS.
Better performance.
Centralized servers, easy
to manage.
Centralized backups.
High reliability.
Peer-to-Peer Model
Client/Server Model
Disadvantages:
Expensive administration.
More hardware intensive.
Advantages:
Uses less expensive networks.
Easy to administer.
Contain both network operating
system and application software.
Ideal for small business and home
users.
Disadvantages:
Individual user performance easily
affected.
Not very secure.
Hard to back up.
23. System Administration and Maintenance ( Lecture One ) 23
Servers Revisited
Sysadmin is responsible for his company's I.T. services.
This includes things like email, file storage, running a website.
Any thoughts on where they're stored?
A server is essentially software or a machine that provides
services to other software or machines.
For example, a web server stores and serves content to
clients through the Internet.
An email server, provides email service to other machines.
And an SSH server provides SSH services to other
machines.
24. System Administration and Maintenance ( Lecture One ) 24
Servers Revisited
Clients request the
services from a server
and in turn, the servers
respond with the
services.
A server can provide
services to multiple
clients at once and the
client can use multiple
servers.
Can any computer be a server ?
25. System Administration and Maintenance ( Lecture One ) 25
Servers Revisited
Server hardware can come
in lots of different forms.
They can be towers that
sit upright, they look very
similar to the desktops
we've seen.
Those towers can be put
in a closet or can sit on the
table if you want them to.
27. System Administration and Maintenance ( Lecture One ) 27
Servers Revisited
If you needed even more
space, you could use blade
servers that are even
slimmer than racks.
28. System Administration and Maintenance ( Lecture One ) 28
Discover the world at Leiden University
Servers Revisited
30. System Administration and Maintenance ( Lecture One ) 30
Overview of installation options
You can choose among the following installation options when
deploying Windows Server 2016:
– Windows Server 2016 (Desktop Experience)—full server installation
This is a full server installation and includes a complete graphical management
interface. This installation option supports all Windows Server roles.
– Windows Server 2016—Server Core installation
provides for a command-line management interface. This installation option has a reduced hardware
footprint but does not support all Windows Server roles.
– Nano Server—minimal server installation of either Standard or
Datacenter edition
This is a new installation option for which Windows Server 2012 and earlier versions have no equivalent. Nano
Server is administered remotely and optimized for hosting in private clouds and datacenters, and for running
applications that are developed by using cloud application
31. System Administration and Maintenance ( Lecture One ) 31
What’s new since Windows Server 2012 was released?
• New features and improvements introduced
in Windows Server 2016:
• PowerShell Direct
• Shielded virtual machines
• Windows Defender
• Storage Spaces Direct
• Storage Replica
• Remote Desktop Services
• Microsoft Passport
• Azure AD Join support
• Privileged Access
Management
• Nano Server
• Containers
• Docker support
• Rolling upgrades for
Hyper-V and storage
clusters
• Hot add/remove virtual
memory & network
adapters
• Nested virtualization