This document provides an overview of Linux by discussing its history, key components, licensing, and how it differs from Windows. It covers:
- The origins and development of Linux from 1991 by Linus Torvalds, influenced by Minix and UNIX.
- The major components of a Linux distribution including the Linux kernel, GNU tools, desktop environments like KDE and GNOME, servers like Apache and Samba.
- Open source licensing models like GPL and LGPL that ensure freedom of use, modification, and redistribution of Linux software.
- Architectural differences like its ability to run on different hardware, support for multiple users, and the optional client-server X Window System.
- Popular distributions like
Getting started with setting up embedded platform requires audience to understand some of the key aspects of Linux. This presentation deals with basics of Linux as an OS, Linux commands, vi editor, Shell features like redirection, pipes and shell scripting
Linux is an operating system or a kernel. It is distributed under an open source license. Its functionality list is quite like UNIX. Linux is an operating system or a kernel which germinated as an idea in the mind of young and bright Linus Torvalds when he was a computer science student. The main advantage of Linux was that programmers were able to use the Linux Kernel to design their own custom operating systems. With time, a new range of user-friendly OS's stormed the computer world. Now, Linux is one of the most popular and widely used Kernel, and it is the backbone of popular operating systems like Debian, Knoppix, Ubuntu, and Fedora.
Getting started with setting up embedded platform requires audience to understand some of the key aspects of Linux. This presentation deals with basics of Linux as an OS, Linux commands, vi editor, Shell features like redirection, pipes and shell scripting
Linux is an operating system or a kernel. It is distributed under an open source license. Its functionality list is quite like UNIX. Linux is an operating system or a kernel which germinated as an idea in the mind of young and bright Linus Torvalds when he was a computer science student. The main advantage of Linux was that programmers were able to use the Linux Kernel to design their own custom operating systems. With time, a new range of user-friendly OS's stormed the computer world. Now, Linux is one of the most popular and widely used Kernel, and it is the backbone of popular operating systems like Debian, Knoppix, Ubuntu, and Fedora.
Difference between Unix & Linux Presentation.pptsarwechabro
The presentation is about how Linux and Unix are different from each other with core differences and some difference on feature based and their all history born to till now everything is defined in this document.
Introduction to Networking | Linux-Unix and System Administration | Docker an...andega
[Digital Skola – Learning Progress Review – Week 3]
The relationship between data engineer and networking, Data Engineers necessary to understand how communication between machines occurs on a data platform, how it enters a network and leaves a network.
At the Linux-Unix and System Administration part, we learn CRON, a time-based job scheduler that has a particular notation to mark when specific jobs need to be executed.
Data engineers must understand how to automate tasks. Many tasks you need to perform on your data may be tedious or may need to happen frequently. For example, you might want to clean up a table in your database on an hourly schedule.
The last is Docker, Docker is an open-source platform, where we can automate our project deployment, software application deployment and we can deploy any of our trained deep learning, machine learning models inside CONTAINERS which not only makes it easier for production but also it adds automation and abstraction.
Docker allows developers to super easily deploy their desired applications or models using containers, so that they can run on the host machine or localhost. It bundles entire dependencies, requirements of an application in a uniform structure. These features make it easy for production as well as enables systematic usage of the resources.
To better understand please see my attachment below.
#DataEngineer
#DigitalSkola
#BootcampDataEngineer
#SkolaClassDataEngineer
#DataEngineering
It is a simple powerpoint presentation on Linux Operating System of its brief and simplified introduction of this Operating System.
This is based on Ubuntu version of Linux.
Every time you switch on your computer, you see a screen where you can perform different activities like write, browse the internet or watch a video. What is it that makes the computer hardware work like that? How does the processor on your computer know that you are asking it to run a mp3 file?
Well, it is the operating system or the kernel which does this work. A kernel is a program at the heart of any operating system that takes care of fundamental stuff, like letting hardware communicate with software.
So, to work on your computer you need an operating system (OS). In fact, you are using one as you read on your computer. Now, you may have used popular OS’s like Windows, Apple OS X but here we see what Linux is and what benefits it offers over other OS choices.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Difference between Unix & Linux Presentation.pptsarwechabro
The presentation is about how Linux and Unix are different from each other with core differences and some difference on feature based and their all history born to till now everything is defined in this document.
Introduction to Networking | Linux-Unix and System Administration | Docker an...andega
[Digital Skola – Learning Progress Review – Week 3]
The relationship between data engineer and networking, Data Engineers necessary to understand how communication between machines occurs on a data platform, how it enters a network and leaves a network.
At the Linux-Unix and System Administration part, we learn CRON, a time-based job scheduler that has a particular notation to mark when specific jobs need to be executed.
Data engineers must understand how to automate tasks. Many tasks you need to perform on your data may be tedious or may need to happen frequently. For example, you might want to clean up a table in your database on an hourly schedule.
The last is Docker, Docker is an open-source platform, where we can automate our project deployment, software application deployment and we can deploy any of our trained deep learning, machine learning models inside CONTAINERS which not only makes it easier for production but also it adds automation and abstraction.
Docker allows developers to super easily deploy their desired applications or models using containers, so that they can run on the host machine or localhost. It bundles entire dependencies, requirements of an application in a uniform structure. These features make it easy for production as well as enables systematic usage of the resources.
To better understand please see my attachment below.
#DataEngineer
#DigitalSkola
#BootcampDataEngineer
#SkolaClassDataEngineer
#DataEngineering
It is a simple powerpoint presentation on Linux Operating System of its brief and simplified introduction of this Operating System.
This is based on Ubuntu version of Linux.
Every time you switch on your computer, you see a screen where you can perform different activities like write, browse the internet or watch a video. What is it that makes the computer hardware work like that? How does the processor on your computer know that you are asking it to run a mp3 file?
Well, it is the operating system or the kernel which does this work. A kernel is a program at the heart of any operating system that takes care of fundamental stuff, like letting hardware communicate with software.
So, to work on your computer you need an operating system (OS). In fact, you are using one as you read on your computer. Now, you may have used popular OS’s like Windows, Apple OS X but here we see what Linux is and what benefits it offers over other OS choices.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Generative AI Deep Dive: Advancing from Proof of Concept to Production
1.1.1.Introduction.pdf
1. Chapter 1: An Introduction to Linux
Chapter 1
An Introduction to Linux
(Slides adopted from ict-innovation.fossfa.net)
2. Chapter 1 Outline
● In this chapter we will learn about:
✓ Some of the key events in the history of Linux
✓ The major components of a linux distribution
✓ How linux is licensed
✓ How Linux di'ers from Windows
3. Some key events in the history of linux
1969 – the dawn of time.
Ken Thompson and Dennis
Ritchie write the /rst
version of UNIX
1984 – Free Software Foundation
start work on the GNU project
which results in a C compiler (gcc)
and editor (emacs) and lots of
command line tools that mimic or
improve on their traditional
UNIX counterparts
1987 -- Andrew Tanenbaum
writes Minix, a UNIX-like O/S
that runs on PCs, mainly as a
teaching aid
1991 – Linus Torvalds starts
development of Linux as a
project to exploit the Intel
386 architecture. Design is
heavily in>uenced by Minix
and UNIX
1994-ish: Explosive growth
of the Internet fosters wide-
spread growth of linux and
the open source movement.
1970 1980 1990 2000
4. The history of Linux (continued)
● Linux began life in 1991
● Linus Torvalds wrote the original Linux operating system as a hobbyist
exercise in exploiting the new Intel 386 memory architecture
● In>uenced by Minix, an operating system written by Torvald's professor
Andy Tanenbaum as a teaching aid, which was in turn based on UNIX
● Not derived from UNIX source code but deliberately UNIX-compatible
● Contributions come from many other developers
● Free Software Foundation wrote bash shell, gcc compiler, many other
command line tools, distributed under the GNU 'brand name'
● Like UNIX before it, linux was not originally conceived as a 'product'
5. Linux distributions
● Strictly speaking, 'linux' refers only to the operating system kernel
– In practice, linux distributions include hundreds of additional items of
software from dozens of development teams
● In theory, all the pieces can be downloaded from the internet free of
charge and assembled into a working system
– In practice this is hard work
● Most users purchase a pre-built distribution
– Snapshot of compatible versions of all components
● Vendors such as RedHat and SuSE add value in several ways:
– Installation and con/guration tools
– Supported ports of Linux to non-PC architectures (eg IBM mainframes)
– Retail products include printed manuals and limited installation support
– Enterprise products provide full support agreements and pro-active
upgrade mechanisms
6. The components of a linux distribution
GNU Command Line Tools
KDE Desktop and toolset
XFree86 Server
Apache Web Server
Linux Kernel
Samba File/Print Server
Many, many others
Installation, con/guration
and maintenance tools,
plus support
RedHat
SuSE
Mandrake
Debian
7. How does linux di'er from windows?
Linux Windows
Free, open-source software Proprietary
Runs on a wide variety of hardware Runs on PCs only
Window System is optional and has
a client/server architecture
Window system is not optional
and is tightly integrated
Supports multiple, simultaneous
interactive users
Intended to support one
interactive user
8. Linux licensing and what 'Free Software' means
● The linux kernel and most linux applications are distributed under
Open Source licences
● A number of open source licences have been developed
● GPL (GNU Public Licence) is the best known and is often adopted by
software developers who do not have the skill or interest to develop their
own licenses
● LGPL (Lesser General Public Licence)
● Many others ... see www.gnu.org/licenses/license-list.html
● Freedom of software refers to liberty not price
● Freedom to run the program
● Freedom to study the program and adapt it for your needs
● Freedom to redistribute copies
● Freedom to improve the program and release the improvements
● See www.opensource.org for a more detailed de/nition
9. X Window system
● The X window system (also called X11 or simply X) was developed in
1984 at MIT
● Design goal was a platform- and hardware-independent window system
● Structured as a client/server architecture
● The X server runs on the machine that the graphics display, keyboard
and mouse is connected to
● Accepts commands from clients to draw windows, text, graphics, etc
● Also makes keyboard and mouse input available to clients
● Provides “mechanism, not policy” (i.e. does not determine look-and-feel)
● SuSE Linux uses an implementation called XFree86 version 4
● X clients (applications that require a graphical user interface) connect
to an X server
● Client may be on same machine as server, or on a di'erent machine
10. X Window system architecture
X Server
Window Manager
(X Client)
Application
(X Client)
Network
Remote
Application
(X Client)
Screen, keyboard
and mouse
It's not unusual to run an X
server on a Microsoft Windows
desktop (eg Hummingbird) to
provide access to graphical
desktops and applications
running on Linux systems
Remote Window
Manager
(X Client)
11. Window managers and desktops
● A window manager is an important X client application, supporting:
● Starting applications via menus,etc
● Moving, resizing, opening, and closing windows
● Some window managers support multiple virtual desktops
● The window manager is partly responsible for establishing a look and
feel of the linux desktop
● It is usually supplemented by a set of desktop tools, such as a launch bar,
graphical /le manager, web browser, clock, calculator, mail user agent,
scheduler, etc.
● The are several window manager / desktop toolsets for Linux:
● KDE The standard desktop supported by SuSE linux
● Gnome Another modern, full featured desktop popular on linux. Used by
CentOS
– Others: twm (part of the X distribution), mwm (motif window
manager;
used to be popular on Solaris), icewm, fvwm2, ...
12. The X Window System is optional
● The X window system is not an integral part of the operating system
– Linux can run with no windowing system or graphical applications
– Many servers are run this way
● Con/gured and administered entirely using command-line tools
– Saves on disk space, memory and CPU cycles
13. Linux is multi-user
● Like later versions of windows, linux supports a user login
– Authenticated by a password
● Linux supports multiple simultaneous logins
– One on the main console, possibly running a graphical desktop
– Several via character terminals connected to serial ports
– Many via network logins using telnet, rlogin, or ssh
● All users have full command line access
● Multiple graphical logins are also possible
– Each user has an independent desktop
– This capability is inherent in the client/server
architecture of the X window system
● Underlying operating system supports
pre-emptive multi-tasking
14. Linux runs on a wide variety of hardware
● Embedded linux
– Phones, set-top boxes, PDAs, PC104 and other
single board computers
– ARM, MIPS processors, etc.
– Specialist market, commercial support from
companies like Montavista
● Mainstream (32-bit and 64-bit)
– Intel, PowerPC, SPARC, Itanium, AMD64
● Big Iron
– IBM z/series mainframe
15. RedHad and CentOS
● Linux runs most of the web servers today
● Many of the Enterprise systems run on RedHat Linux
● CentOS is a stripped-down version of RedHat