This is the slide where you find about the find and locate utility in Linux as well as you get some useful command to by using that you learn more about find & locate utility of Linux.
This document provides a summary of common Linux commands organized by category including file permissions, networking, compression/archives, package installation, searching, login, file transfer, disk usage, directory traversal, system information, hardware information, users, file commands, and process related commands. It also includes brief descriptions and examples of commands like chmod, chown, ip, tar, rpm, grep, ssh, df, du, and kill. More detailed information on Linux commands can be found at the provided URL.
This document provides 15 examples of using the Linux grep command to search files for text patterns. Some key examples include searching for a string in single or multiple files, ignoring case, using regular expressions to match patterns, displaying lines before/after/around matches, inverting matches, counting matches, and highlighting matched text. The examples demonstrate many useful grep options for finding text in files.
This document provides information on the find and locate commands in Linux/Unix systems. Find searches the file system recursively to locate files and directories based on user-specified criteria like name, type, permissions, size, etc. Locate searches a database of file names and permissions that is usually updated daily. While find searches in real-time, locate searches faster but may return outdated results if the database is not recent. Both commands have options to filter results but find offers more filtering capabilities.
This lecture discusses the concept of Regular Expressions along with its usage in different tools such as grep, sed, and awk
Check the other Lectures and courses in
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This document provides an overview of Linux Bash shell scripting. It covers topics such as writing basic scripts, variables, conditionals, loops, functions, arguments, and input/output redirection. Examples are given for many common scripting tasks like arithmetic operations, string manipulation, file operations, and comparing values. The document is intended to teach the basics of scripting in the Linux Bash shell.
This document is a presentation on introducing Linux shell scripting. It begins by stating that the talk is aimed at those who can open a terminal and type commands. It then outlines what will be covered, including basic shell commands, combining commands, creating simple scripts, and using cron for automation. The document provides examples of commands for files, disks, processes, and networks. It also demonstrates how to combine commands using pipes and redirection. Finally, it shows how to create simple scripts and discusses using cron for automation.
The document discusses Linux file systems and input/output. It describes the basic structure of Linux file systems, including the root directory and common file system types like Ext4, XFS, and Btrfs. It also summarizes the different classes of devices in Linux - block devices, character devices, and network devices. Block devices provide access to storage and allow random access to fixed sized blocks. Character devices process data sequentially and include keyboards and printers. Network devices operate indirectly through sockets, protocols, and network drivers.
This document provides an introduction and overview of shell scripting in Linux. It discusses what a shell script is, when they should and should not be used, examples of common shell scripts, and an introduction to programming features commonly used in shell scripts such as variables, conditionals, loops, command line arguments, and more. Key points covered include that shell scripts allow automating command execution, are useful for repetitive tasks, and come with programming features to customize behavior.
This document provides a summary of common Linux commands organized by category including file permissions, networking, compression/archives, package installation, searching, login, file transfer, disk usage, directory traversal, system information, hardware information, users, file commands, and process related commands. It also includes brief descriptions and examples of commands like chmod, chown, ip, tar, rpm, grep, ssh, df, du, and kill. More detailed information on Linux commands can be found at the provided URL.
This document provides 15 examples of using the Linux grep command to search files for text patterns. Some key examples include searching for a string in single or multiple files, ignoring case, using regular expressions to match patterns, displaying lines before/after/around matches, inverting matches, counting matches, and highlighting matched text. The examples demonstrate many useful grep options for finding text in files.
This document provides information on the find and locate commands in Linux/Unix systems. Find searches the file system recursively to locate files and directories based on user-specified criteria like name, type, permissions, size, etc. Locate searches a database of file names and permissions that is usually updated daily. While find searches in real-time, locate searches faster but may return outdated results if the database is not recent. Both commands have options to filter results but find offers more filtering capabilities.
This lecture discusses the concept of Regular Expressions along with its usage in different tools such as grep, sed, and awk
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
This document provides an overview of Linux Bash shell scripting. It covers topics such as writing basic scripts, variables, conditionals, loops, functions, arguments, and input/output redirection. Examples are given for many common scripting tasks like arithmetic operations, string manipulation, file operations, and comparing values. The document is intended to teach the basics of scripting in the Linux Bash shell.
This document is a presentation on introducing Linux shell scripting. It begins by stating that the talk is aimed at those who can open a terminal and type commands. It then outlines what will be covered, including basic shell commands, combining commands, creating simple scripts, and using cron for automation. The document provides examples of commands for files, disks, processes, and networks. It also demonstrates how to combine commands using pipes and redirection. Finally, it shows how to create simple scripts and discusses using cron for automation.
The document discusses Linux file systems and input/output. It describes the basic structure of Linux file systems, including the root directory and common file system types like Ext4, XFS, and Btrfs. It also summarizes the different classes of devices in Linux - block devices, character devices, and network devices. Block devices provide access to storage and allow random access to fixed sized blocks. Character devices process data sequentially and include keyboards and printers. Network devices operate indirectly through sockets, protocols, and network drivers.
This document provides an introduction and overview of shell scripting in Linux. It discusses what a shell script is, when they should and should not be used, examples of common shell scripts, and an introduction to programming features commonly used in shell scripts such as variables, conditionals, loops, command line arguments, and more. Key points covered include that shell scripts allow automating command execution, are useful for repetitive tasks, and come with programming features to customize behavior.
This document contains 49 multiple choice questions about various Linux commands and concepts. The questions cover topics such as common commands (e.g. ls, cd), file system navigation, permissions, processes, networking and system administration tasks. Each question is followed by 4 possible answer choices.
Este documento presenta una lista de comandos básicos de sistemas operativos, incluyendo comandos para gestionar archivos, directorios, visualizar contenido y modificar permisos. Explica el uso y parámetros de comandos como ls, cd, touch, cat, more, cp, mv, rm, entre otros. El documento provee ejemplos para ilustrar el uso correcto de cada comando.
This document provides course material for the subject of Operating Systems for 4th semester B.E. Computer Science Engineering students at A.V.C. College of Engineering. It includes information on the name and designation of the faculty teaching the course, the academic year, curriculum regulations, 5 units that make up the course content, textbook and reference details. The course aims to cover key topics in operating systems including processes, process scheduling, storage management, file systems and I/O systems.
The document provides an introduction to shell scripting basics in UNIX/Linux systems. It discusses what a shell and shell script are, introduces common shells like bash, and covers basic shell scripting concepts like running commands, variables, conditionals, loops, and calling external programs. Examples are provided for many common shell scripting tasks like file manipulation, text processing, scheduling jobs, and more.
Summary of UNIX commands used in the BTI Plant Bioinformatics Course in 2014. It includes a description of these common commands and some useful options.
The document discusses various inter-process communication (IPC) mechanisms in Linux including pipes, FIFOs, messages, shared memory, and sockets. It provides detailed explanations of how pipes and FIFOs are implemented in the Linux kernel, including how they are created, read from, and written to via system calls. It also summarizes the use of System V IPC features like semaphores, messages, and shared memory for communication between processes.
Las Pruebas Unitarias, son una técnica esencial en la búsqueda de generar software con calidad. Ejemplo de una prueba de unidad con código java utilizando NetBeans y JUnit
5.5 mecanismos de acceso a los archivosRey JOaquin
Este documento describe varios mecanismos para acceder archivos, incluyendo descriptores de archivos, directorios, controles de acceso, y métodos de apertura y cierre. Explica que los descriptores de archivos contienen información como el nombre, ubicación, organización, y fechas de creación y modificación de un archivo que el sistema necesita para administrarlo. También cubre mecanismos de control de acceso para autorizar o denegar el acceso a usuarios, y métodos de acceso secuencial e indexado a archivos.
This lecture covers the use of wild cards in Linux commands, as well as escape sequences
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
This document describes the functions of various Linux commands, including commands for listing files (ls), creating directories (mkdir) and files (touch, cat), copying files (cp), changing directories (cd), moving files (mv), finding file locations (whereis, which), displaying manual pages (man, info), checking disk usage (df, du), viewing running processes (ps), setting aliases (alias), changing user identity (su, sudo), viewing command history (history), setting the system date and time (date), displaying calendars (cal), and clearing the terminal screen (clear). It provides the syntax and examples for using each command.
La segmentación de memoria permite dividir un programa en segmentos lógicos de tamaño variable que pueden ser cargados en memoria de forma independiente según sean necesarios, optimizando el uso de la memoria limitada. Cada segmento contiene información lógica del programa como subrutinas o arreglos y son mapeados a direcciones de memoria física mediante una tabla de segmentos.
we need to have a good amount of basic or in-depth knowledge on Linux Basics. This will help one's job easy in resolving the issues and supporting the projects.
Are you a system admin or database admin? Or working on any other technology which is deployed or implemented on linux/UNIX machines? Then you should be good with Linux basic concepts and commands. We will cover this section very clearly.
This document provides an overview of basic Linux commands, including man for accessing manual pages, ls for listing directory contents, mkdir for creating directories, cd for changing directories, pwd for printing the working directory, and ~ for accessing the home directory. It also covers commands for copying, moving, removing files, clearing the screen, viewing file contents, searching within files, counting words, piping commands together, using wildcards, and changing file permissions with chmod. The document encourages learning through manual pages and understanding error messages.
This lecture discusses a group of techniques to use commands output/Input to feed into other commands or into files. It also covers argument expansion and quoting
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
Inter process communication using Linux System Callsjyoti9vssut
This document discusses various methods of inter-process communication (IPC) in Linux using system calls and standard APIs. It describes pipes, FIFOs, message queues, and shared memory as common IPC methods. For each method, it provides details on the relevant system calls and functions, and includes code examples of producer-consumer implementations using message queues and shared memory.
Lenguajes aceptados por una maquina de turingvmtorrealba
El documento describe los diferentes tipos de lenguajes aceptados por una máquina de Turing, incluyendo lenguajes regulares, lenguajes libres de contexto y lenguajes recursivamente enumerables. También explica la diferencia entre máquinas de Turing deterministas y no deterministas, y cómo las máquinas no deterministas pueden resolver problemas de complejidad exponencial en tiempo polinómico a través de la bifurcación en múltiples copias.
Tuned is a tool that dynamically tunes Linux system settings for optimal performance based on usage profiles. It includes several predefined profiles for common workloads and use cases. New in Red Hat Enterprise Linux 7, Tuned is installed by default and automatically sets an initial profile. It provides improved maintainability, monitoring plugins for gathering system data, dynamic tuning capabilities, and a recommender system to select the best profile. Upcoming enhancements will add more configuration options, profile descriptions, and integration with udev.
The document announces that there will be no services at the church on Wednesday, July 2nd due to the Fourth of July holiday. It also informs readers to register for an upcoming event by Monday, July 21st by calling or emailing the church office.
El documento compara diferentes sitios web para compartir presentaciones y documentos en línea como SlideShare, SlideBoom, Scribd y Slideshow. SlideShare permite subir archivos de hasta 30 MB, mientras que Scribd permite archivos de hasta 100 MB. SlideShare funciona más como una red social donde los usuarios pueden acceder a contenidos educativos compartidos, mientras que Scribd se enfoca más en compartir y buscar documentos genéricos.
This document contains 49 multiple choice questions about various Linux commands and concepts. The questions cover topics such as common commands (e.g. ls, cd), file system navigation, permissions, processes, networking and system administration tasks. Each question is followed by 4 possible answer choices.
Este documento presenta una lista de comandos básicos de sistemas operativos, incluyendo comandos para gestionar archivos, directorios, visualizar contenido y modificar permisos. Explica el uso y parámetros de comandos como ls, cd, touch, cat, more, cp, mv, rm, entre otros. El documento provee ejemplos para ilustrar el uso correcto de cada comando.
This document provides course material for the subject of Operating Systems for 4th semester B.E. Computer Science Engineering students at A.V.C. College of Engineering. It includes information on the name and designation of the faculty teaching the course, the academic year, curriculum regulations, 5 units that make up the course content, textbook and reference details. The course aims to cover key topics in operating systems including processes, process scheduling, storage management, file systems and I/O systems.
The document provides an introduction to shell scripting basics in UNIX/Linux systems. It discusses what a shell and shell script are, introduces common shells like bash, and covers basic shell scripting concepts like running commands, variables, conditionals, loops, and calling external programs. Examples are provided for many common shell scripting tasks like file manipulation, text processing, scheduling jobs, and more.
Summary of UNIX commands used in the BTI Plant Bioinformatics Course in 2014. It includes a description of these common commands and some useful options.
The document discusses various inter-process communication (IPC) mechanisms in Linux including pipes, FIFOs, messages, shared memory, and sockets. It provides detailed explanations of how pipes and FIFOs are implemented in the Linux kernel, including how they are created, read from, and written to via system calls. It also summarizes the use of System V IPC features like semaphores, messages, and shared memory for communication between processes.
Las Pruebas Unitarias, son una técnica esencial en la búsqueda de generar software con calidad. Ejemplo de una prueba de unidad con código java utilizando NetBeans y JUnit
5.5 mecanismos de acceso a los archivosRey JOaquin
Este documento describe varios mecanismos para acceder archivos, incluyendo descriptores de archivos, directorios, controles de acceso, y métodos de apertura y cierre. Explica que los descriptores de archivos contienen información como el nombre, ubicación, organización, y fechas de creación y modificación de un archivo que el sistema necesita para administrarlo. También cubre mecanismos de control de acceso para autorizar o denegar el acceso a usuarios, y métodos de acceso secuencial e indexado a archivos.
This lecture covers the use of wild cards in Linux commands, as well as escape sequences
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
This document describes the functions of various Linux commands, including commands for listing files (ls), creating directories (mkdir) and files (touch, cat), copying files (cp), changing directories (cd), moving files (mv), finding file locations (whereis, which), displaying manual pages (man, info), checking disk usage (df, du), viewing running processes (ps), setting aliases (alias), changing user identity (su, sudo), viewing command history (history), setting the system date and time (date), displaying calendars (cal), and clearing the terminal screen (clear). It provides the syntax and examples for using each command.
La segmentación de memoria permite dividir un programa en segmentos lógicos de tamaño variable que pueden ser cargados en memoria de forma independiente según sean necesarios, optimizando el uso de la memoria limitada. Cada segmento contiene información lógica del programa como subrutinas o arreglos y son mapeados a direcciones de memoria física mediante una tabla de segmentos.
we need to have a good amount of basic or in-depth knowledge on Linux Basics. This will help one's job easy in resolving the issues and supporting the projects.
Are you a system admin or database admin? Or working on any other technology which is deployed or implemented on linux/UNIX machines? Then you should be good with Linux basic concepts and commands. We will cover this section very clearly.
This document provides an overview of basic Linux commands, including man for accessing manual pages, ls for listing directory contents, mkdir for creating directories, cd for changing directories, pwd for printing the working directory, and ~ for accessing the home directory. It also covers commands for copying, moving, removing files, clearing the screen, viewing file contents, searching within files, counting words, piping commands together, using wildcards, and changing file permissions with chmod. The document encourages learning through manual pages and understanding error messages.
This lecture discusses a group of techniques to use commands output/Input to feed into other commands or into files. It also covers argument expansion and quoting
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
Inter process communication using Linux System Callsjyoti9vssut
This document discusses various methods of inter-process communication (IPC) in Linux using system calls and standard APIs. It describes pipes, FIFOs, message queues, and shared memory as common IPC methods. For each method, it provides details on the relevant system calls and functions, and includes code examples of producer-consumer implementations using message queues and shared memory.
Lenguajes aceptados por una maquina de turingvmtorrealba
El documento describe los diferentes tipos de lenguajes aceptados por una máquina de Turing, incluyendo lenguajes regulares, lenguajes libres de contexto y lenguajes recursivamente enumerables. También explica la diferencia entre máquinas de Turing deterministas y no deterministas, y cómo las máquinas no deterministas pueden resolver problemas de complejidad exponencial en tiempo polinómico a través de la bifurcación en múltiples copias.
Tuned is a tool that dynamically tunes Linux system settings for optimal performance based on usage profiles. It includes several predefined profiles for common workloads and use cases. New in Red Hat Enterprise Linux 7, Tuned is installed by default and automatically sets an initial profile. It provides improved maintainability, monitoring plugins for gathering system data, dynamic tuning capabilities, and a recommender system to select the best profile. Upcoming enhancements will add more configuration options, profile descriptions, and integration with udev.
The document announces that there will be no services at the church on Wednesday, July 2nd due to the Fourth of July holiday. It also informs readers to register for an upcoming event by Monday, July 21st by calling or emailing the church office.
El documento compara diferentes sitios web para compartir presentaciones y documentos en línea como SlideShare, SlideBoom, Scribd y Slideshow. SlideShare permite subir archivos de hasta 30 MB, mientras que Scribd permite archivos de hasta 100 MB. SlideShare funciona más como una red social donde los usuarios pueden acceder a contenidos educativos compartidos, mientras que Scribd se enfoca más en compartir y buscar documentos genéricos.
Estudio del trabajo en el hospital arco iris 1abdel rivera
El documento describe un estudio realizado por estudiantes de ingeniería de sistemas sobre el departamento de sistemas en el Hospital Arco Iris. El departamento está compuesto por un jefe de sistemas y dos empleados responsables del hardware y software. Ellos se encargan del funcionamiento y mantenimiento de los sistemas informáticos y de seguridad del hospital. El estudio analiza las funciones y responsabilidades del departamento de sistemas, los softwares y hardware utilizados, y concluye que el recorrido por el hospital les brindó una visión valiosa
This document contains a career summary and qualifications for AMDHURTHI SHIVA PRASAD. It summarizes his technical skills which include programming languages like Java and C, mobile technologies like Android and Windows, and MS Office. It lists his Bachelor's degree in Electrical and Electronics Engineering from Sindhuracollege of engineeringandtechnology. It also provides details about two academic year projects, one on enhancing micro turbine output voltage using MATLAB and another on a prepaid energy meter consumption system using embedded technologies. Personal details like date of birth, languages known, and address are also included.
Steven Doyle has over 30 years of experience working in various engineering and safety roles. He currently works as a Health & Safety Manager, where he leads a team of safety advisors and trainers. He has qualifications in occupational safety and health, including a BSc degree. His background includes work in the explosives, nuclear, manufacturing, construction, and energy sectors.
The document outlines rules for retirement of employees of the Pakistan Water and Power Development Authority (WAPDA). Some key points:
- The rules apply to all WAPDA employees except those on deputation or probation.
- Employees will retire after 20 years of service or at age 60, unless directed to retire earlier by authorities for public interest reasons.
- Procedures are defined for retirement of employees who have completed 25 years of service or reached age 55, including giving three months notice and an opportunity to respond.
- Guidelines are provided for reviewing employee cases for retirement according to the rules. Employees must be given notice and a chance to respond before a final retirement order is passed.
El documento proporciona información sobre dos lugares populares para visitar en Madrid: La Puerta del Sol y el Estadio Santiago Bernabéu. La Puerta del Sol es muy popular especialmente durante la Navidad y la Nochevieja debido a sus eventos y espectáculos. El Estadio Santiago Bernabéu es el hogar del equipo de fútbol Real Madrid y es recomendable para los fanáticos del fútbol, aunque puede ser aburrido para otros. El documento también incluye detalles sobre precios y horarios de visitas para el Estadio Santiago Bern
Ben Kinsella Trust - Impact Report 2016Patrick Green
The Ben Kinsella Trust has delivered its knife crime prevention exhibition to over 7,200 young people over the last 3 years. Survey results from 3,950 visitors show that young people are deeply concerned about knife crime and youth violence, with over half sometimes not feeling safe. The exhibition aims to educate youth on the consequences of knife carrying through interactive experiences. Evaluation found it significantly reduced beliefs that knives provide protection and self-reported knife carrying. The Trust recommends continued education efforts in schools and at home, as well as support for at-risk youth, to further address this complex issue.
This document summarizes research on the relationship between social competence and happiness. It finds that:
1. Social competence correlates with and can predict happiness independently of other factors. Extroverts in particular tend to experience more favorable social interactions that buffer against depression.
2. Neuroticism also correlates with happiness and this relationship can be explained in part by neurotics having fewer social skills and being more prone to negative emotions.
3. Cooperation is an important source of attraction between individuals and has been correlated with measures of happiness and well-being. Females tend to be more cooperative than males.
This document discusses Linux file management and file system hierarchy. It covers topics such as directory trees with the root directory at the top; absolute and relative file paths; commands for creating, deleting, copying, moving and linking files; and commands for finding files and determining file types and command locations.
Unix was created in 1969 by AT&T developers at Bell Labs. It is used on servers, workstations, and mobile devices. Unix provided the foundation for the development of Mac OS X. The document then provides examples of common Unix commands like cd to change directories, ls to list files, mkdir to create directories, top to view running processes, kill to stop processes, grep to find text in files, and find to locate files. It recommends using man pages or passing -h/–help flags to get help on how to use commands.
The document discusses how operating systems manage files and memory allocation. It explains that from the computer's perspective, there are no actual files, only blocks of allocated and unallocated memory. The file manager in the operating system creates the illusion of files and folders by tracking file locations, allocating and de-allocating memory blocks, and maintaining file records. Files can be stored contiguously, non-contiguously, or via indexed blocks with pointers. Access permissions are managed via access control matrices or command line tools like cacls and chmod.
The document discusses how operating systems manage files and memory allocation. It explains that from the computer's perspective, there are no actual files, only blocks of allocated and unallocated memory. The file manager in the operating system creates the illusion of files and folders by tracking memory locations and implementing file allocation policies. Files can be stored contiguously, non-contiguously, or through indexed allocation with pointers. Access controls determine which users can access which files.
This document provides an overview of Linux basics including the directory structure, file permissions, common commands, shells, and Bash shell scripting. It covers key topics such as navigating the file system, setting file permissions, using commands like ls, cd, and rm, defining environment and shell variables, and controlling program flow using conditional statements and loops in Bash scripts.
Server is a machine configured to accept requests from clients and respond accordingly. Linux is commonly used for servers, with distributions like Ubuntu, Redhat, and Debian. Key principles of Linux include treating everything as a file, storing configuration data in text files, and using pipes to connect programs. Common server files include /etc/group, /etc/passwd, and /etc/shadow which contain user and group information.
R- create a table from a list of files.... before webminingGabriela Plantie
This document discusses creating a table from a list of files by extracting text between delimiters. It defines file paths and an empty data frame to store results. Files are read and text is collapsed. A regular expression is used to find text between "<div class="nota">" and "</div>" tags, and this note text is added to the data frame along with the file name. The process repeats to populate the data frame with file names and note text extracted from multiple files.
Course 102: Lecture 3: Basic Concepts And Commands Ahmed El-Arabawy
This lecture covers the basic file management commands
Check the other Lectures and courses in
http://Linux4EnbeddedSystems.com
or Follow our Facebook Group at
- Facebook: @LinuxforEmbeddedSystems
Lecturer Profile:
- https://www.linkedin.com/in/ahmedelarabawy
4.7 find system files and place files in the correct locationAcácio Oliveira
The document discusses utilities for locating files on a Linux system, including find, locate, whereis, and which. It explains that find searches for files based on various options like name, user and path. Locate uses a database updated by updatedb to quickly search for file locations. Whereis locates binaries, manuals and sources for files. Which prints the path of executables. The document also covers the Filesystem Hierarchy Standard which defines directories and their purposes.
Unix was first developed in 1969 by four programmers at Bell Labs. It was initially written in assembly language, then converted to C language in 1972-1973. Linux was created in 1991 by Linus Torvaldes as the kernel of an open source operating system. Key principles of Linux include treating everything as a file/directory, using small single purpose programs, and storing all configuration data in text files. This document provides an overview of Linux commands and concepts related to users, groups, permissions, backups, processes and more.
Unix was first developed in 1969 by four programmers at Bell Labs. It was originally written in assembly language, then converted to C language in 1972-1973. Linux was created in 1991 by Linus Torvaldes as a kernel for his new operating system. Some key principles of Linux include treating everything as a file/directory, small single-purpose programs, ability to chain programs together, avoiding captive user interfaces, and storing all configuration data in text files.
This document provides information about scheduling jobs in UNIX/Linux systems. It discusses using the cron daemon to schedule jobs to run periodically based on time and date settings. It also covers using the at command to schedule single jobs to run once at a specific time. The crontab file format and common cron directories are described. It outlines how to list, delete, and manage scheduled jobs, and how user access to job scheduling is configured through cron access control files.
This document provides an introduction to Unix file systems and attributes. It discusses inodes, hard links created using the ln command, the umask command for setting default file permissions, and using the find command to search for files based on various criteria like name, size, permissions and more. Examples are given for using ln to create hard links, viewing inode numbers and link counts, setting umask, and searching with find. Exercises are included to practice using find to locate files based on attributes.
BITS: Introduction to Linux - Software installation the graphical and the co...BITS
This slide is part of the BITS training session: "Introduction to linux for life sciences."
See http://www.bits.vib.be/index.php?option=com_content&view=article&id=17203890%3Abioperl-additional-material&catid=84&Itemid=284
The document discusses tools for finding and processing files in Linux. It covers the locate command, which searches a prebuilt database, and examples of its usage. It also covers the find command, which searches file hierarchies in real-time, and examples of using find with criteria like names, permissions, sizes, timestamps and executing commands on matched files.
This document discusses file systems and their implementation. It covers key concepts like file attributes, operations, access methods, directory structures, allocation methods, and more. Specifically:
- File attributes include the name, identifier, type, location, size, and protection attributes to control access and monitor usage.
- Common file operations are create, write, read, reposition, delete, truncate, open, and close.
- Access methods can be sequential or direct, with sequential only allowing reading/writing in order and direct allowing random access.
- Directory structures organize files in a tree structure with nodes containing metadata to locate files on disk.
- Allocation methods like contiguous, linked, and indexed are
101 4.7 find system files and place files in the correct locationAcácio Oliveira
This document discusses locating files on a Linux system. It describes several commands used for finding files, including find, locate, which, and whereis. Find searches for files based on various expressions. Locate uses a database to quickly search for file locations. Which prints the path of executables. Whereis locates source, binary, and manual section files. The document also discusses the Filesystem Hierarchy Standard for placement of files on Linux systems.
101 4.7 find system files and place files in the correct locationAcácio Oliveira
This document discusses locating files on a Linux system. It describes the find, locate, which, and whereis commands and their syntax and options for finding files and their locations. The key utilities covered are find, which searches for files matching expressions; locate, which searches a database index for file locations; which, which finds the location of executables; and whereis, which finds the location of binaries, manuals, and sources of commands. It also discusses the Filesystem Hierarchy Standard for placement of files on Linux systems.
BITS: Introduction to Linux - Text manipulation tools for bioinformaticsBITS
The document provides an introduction to using the Linux command line for bioinformatics tasks. It covers navigating the file system, manipulating files and directories, input/output redirection, piping commands together, and commonly used text processing tools. The goal is to help users easily use command line tools, automate repetitive tasks, and parse/summarize text-based outputs.
The split utility breaks long files into smaller files, the lp and lpr utilities manage printing, and find searches for files meeting criteria and acts on them. Mtools copies files to DOS floppies, while tar archives a directory tree or file into a single file for storage, transfer, or relocation.
Top Benefits of Using Salesforce Healthcare CRM for Patient Management.pdfVALiNTRY360
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2. ● Find command used to search and locate list of files and
directories.
● Conditions like
permissions, users, groups, file type, date, size
● Find arguments are case sensitive.
● Find is slower in compare with locate.
● Find take deafult path as pwd.
Find & Locate utility
Prepared By: Bhavik Bhasnali
3. Find & Locate utility
Lets go through sets of command...!!!???
Prepared By: Bhavik Bhasnali
4. Find & Locate utility
● $ find (complete path) -name (file name)
Case sensitive
● $ find (complete path) -iname (file name)
not case sensitive
● $ find (complete path) -type f -name (file name) – for file
$ find (complete path) -type d -name (file name) – for
directory
Prepared By: Bhavik Bhasnali
5. Find & Locate utility
● $ find (complete path) -mtime -(days/minute)
-mtime ---> Modified -(days) back
-atime ---> Accessed -(days) back
-cmin ---> Changed -(minute) back
-amin ---> Accessed -(minute) back
-mmin --> Modified -(minute) back
● $ find (complete path) -size (filesize)(K/M/G)
K -> KB M -> MB G -> GB
Prepared By: Bhavik Bhasnali
6. ● Locate command used to search and locate list of files.
● Locate can search for files very quickly.
● Locate does not search the file on disk rather it searches for file
paths in a database.
● Database is a file that contains information about the files and
their path on our system and is located at,
/var/lib/mlocate/mlocate.db
● Updatedb keep mlocate database updated when we excute it.
Find & Locate utility
Prepared By: Bhavik Bhasnali
7. Find & Locate utility
Lets go through sets of command...!!!???
Prepared By: Bhavik Bhasnali
8. Find & Locate utility
● $ locate (file name) -> case sensitive
● $ locate -0 (file name) -> output in continues format
● $ locate -c (file name) -> output is in numaric form
Prepared By: Bhavik Bhasnali
9. Find & Locate utility
● $ locate -i (file name) -> not case sensitive
● $ locate -l (number) (file name) -> show (number) of
o/p
● $ locate -e (file name) -> print file which exists in
system
Prepared By: Bhavik Bhasnali