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Linux System Linux System Presentation Transcript

  • Introduction to Linux System © 2013 SysPlay eLearning Academy for You <http://sysplay.in> All Rights Reserved.
  • What to Expect?Ws of Linux SystemLinux Uses BasicsMagic with Vim EditorPartitioning and Installing Linux SystemX86 Booting sequence © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 2 All Rights Reserved.
  • Ws of Linux System© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 3 All Rights Reserved.
  • TopicWhat is Linux System?Why Linux System?What makes “Linux” as best Operating System?What are the places Linux is being used? © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 4 All Rights Reserved.
  • Linux Usage Basics© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 5 All Rights Reserved.
  • TopicsRoot & System DirectoriesShell Basics & the bash ShellFile Basics & related CommandsUser Basics & related CommandsFile Access PermissionsSystem & Help InformationStandard I/O, Redirection and Pipes © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 6 All Rights Reserved.
  • /the Root of an inverted treeThe top-most or super-parent directoryThe container of your computerType: ls / © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 7 All Rights Reserved.
  • System Directories/bin, /sbin - system binaries/applications/var - logs, mails/proc, /sys - “virtual” windows into the kernel/etc - configuration files/lib - shared system libraries/dev - device files/boot - Linux kernel and boot related binary files/opt - for third-party packages/root, /home - home directory for super user & other users/usr - user space related files and dirs (binaries, libraries, ...)/tmp - scratch pad/mnt - mount points © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 8 All Rights Reserved.
  • Shell BasicsWhat is a Shell?Various types of Shells Bourne Shell (sh) C Shell (csh) Korn Shell (ksh) Bourne Again Shell (bash) TENEX csh (tcsh) Z Shell (zsh) Busybox (busybox) – Embedded Systems © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 9 All Rights Reserved.
  • Bourne Again SHellenv - shell environment variablesexport [var_name] - export a shell variable HOME - path to user’s home directory PATH - executable search path PWD - present user directory PS1 - command promptwhich - shows executable pathhistory - command recall © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 10 All Rights Reserved.
  • Bourne Again SHell ...alias - create shortcuts to commandsfile - shows the information about a filetype - shows information about a commandScripts /etc/profile - System wide startup script ~/.bash_profile – User specific startup script ~/.bashrc – Shell specific startup script ~/.bash_logout – User specific shutdown script © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 11 All Rights Reserved.
  • File BasicsEvery thing is viewed as a file in LinuxA file under the /Seven Types Regular (-) Directory (d) Character Device (c) Block Device (b) Named Pipe (p) Socket (s) Symbolic Link (l) © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 12 All Rights Reserved.
  • File related Shell Commandsls - list directory/file contents cat, less, head, tail - used tocd - change directory view text files vi, vim - editorspwd - print working directory touch - create and update filesdf - disk free grep - search in filesdu - disk usage find, locate - search for filescp - copy gzip, gunzip, bzip, bunzip -mv - move, rename compressionrm – remove tar - archivemkdir - make directory sed, awk - file manipulationrmdir - remove directory © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 13 All Rights Reserved.
  • User BasicsAll Accesses into a Linux System are through aUser with a Password Super User – root Normal Users - <user_name> Files: /etc/passwd, /etc/shadowUsers can be categorized into groups root, bin, sys, adm, … File: /etc/group © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 14 All Rights Reserved.
  • User related Shell Commandsuseradd - create useruserdel - delete userusermod - modify usersu - <username> - start new shell as different userfinger - user information lookuppasswd - change or create user passwordwho, w, user - to find out who is logged in © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 15 All Rights Reserved.
  • Related Shell Commandschmod – Change file permissionschown – Change file ownerchgrp – Change file group © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 17 All Rights Reserved.
  • Few “Help”ful Shell Commandsuname - print system informationman <topic> - manual pagesinfo <topic> - information pages © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 18 All Rights Reserved.
  • The Complete Software System Applications OS Services Operating System Hardware “Kernel Space” “User Space” © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 19 All Rights Reserved.
  • Partitioning and Installing Linux System © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 20 All Rights Reserved.
  • Magic with VIM Editor© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 21 All Rights Reserved.
  • VIM Key Sheet© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 22 All Rights Reserved.
  • X86 Booting sequence © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 23 All Rights Reserved.
  • X86 booting Flowchart © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 24 All Rights Reserved.
  • What all have we learnt?Introduction to Linux SystemLinux Usage BasicsMagic of VIM editorLinux System OverviewPartitioning and Installing Linux SystemX86 Booting Sequence © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 25 All Rights Reserved.
  • Any Queries?© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 26 All Rights Reserved.