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Linux System
1.
Introduction to Linux
System © 2013 SysPlay eLearning Academy for You <http://sysplay.in> All Rights Reserved.
2.
What to Expect? W's
of Linux System Linux Uses Basics Magic with Vim Editor Partitioning and Installing Linux System X86 Booting sequence © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 2 All Rights Reserved.
3.
W's of Linux
System © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 3 All Rights Reserved.
4.
Topic What 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.
5.
Linux Usage Basics ©
2013 SysPlay eLearning Academy for You <http://sysplay.in> 5 All Rights Reserved.
6.
Topics Root & System
Directories Shell Basics & the 'bash' Shell File Basics & related Commands User Basics & related Commands File Access Permissions System & Help Information Standard I/O, Redirection and Pipes © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 6 All Rights Reserved.
7.
/ the Root of
an inverted tree The top-most or super-parent directory The container of your computer Type: ls / © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 7 All Rights Reserved.
8.
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.
9.
Shell Basics What 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.
10.
Bourne Again SHell env
- shell environment variables export [var_name] - export a shell variable HOME - path to user’s home directory PATH - executable search path PWD - present user directory PS1 - command prompt which - shows executable path history - command recall © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 10 All Rights Reserved.
11.
Bourne Again SHell
... alias - create shortcuts to commands file - shows the information about a file type - shows information about a command Scripts /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.
12.
File Basics Every thing
is viewed as a file in Linux A 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.
13.
File related Shell
Commands ls - list directory/file contents cat, less, head, tail - used to cd - change directory view text files vi, vim - editors pwd - print working directory touch - create and update files df - disk free grep - search in files du - disk usage find, locate - search for files cp - copy gzip, gunzip, bzip, bunzip - mv - move, rename compression rm – remove tar - archive mkdir - make directory sed, awk - file manipulation rmdir - remove directory © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 13 All Rights Reserved.
14.
User Basics All Accesses
into a Linux System are through a User with a Password Super User – root Normal Users - <user_name> Files: /etc/passwd, /etc/shadow Users 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.
15.
User related Shell
Commands useradd - create user userdel - delete user usermod - modify user su - <username> - start new shell as different user finger - user information lookup passwd - change or create user password who, w, user - to find out who is logged in © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 15 All Rights Reserved.
16.
Related Shell Commands chmod
– Change file permissions chown – Change file owner chgrp – Change file group © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 17 All Rights Reserved.
17.
Few “Help”ful Shell
Commands uname - print system information man <topic> - manual pages info <topic> - information pages © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 18 All Rights Reserved.
18.
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.
19.
Partitioning and Installing
Linux System © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 20 All Rights Reserved.
20.
Magic with VIM
Editor © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 21 All Rights Reserved.
21.
VIM Key Sheet ©
2013 SysPlay eLearning Academy for You <http://sysplay.in> 22 All Rights Reserved.
22.
X86 Booting sequence
© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 23 All Rights Reserved.
23.
X86 booting Flowchart
© 2013 SysPlay eLearning Academy for You <http://sysplay.in> 24 All Rights Reserved.
24.
What all have
we learnt? Introduction to Linux System Linux Usage Basics Magic of VIM editor Linux System Overview Partitioning and Installing Linux System X86 Booting Sequence © 2013 SysPlay eLearning Academy for You <http://sysplay.in> 25 All Rights Reserved.
25.
Any Queries? © 2013
SysPlay eLearning Academy for You <http://sysplay.in> 26 All Rights Reserved.