Basic C L I

Basic CLI Session 2 By: Bahaa S. Salama (bahaa2008)

Why brother ?
Powerful
Easier to get help (Not descriptive)
Performance (Take less resources)
“ A child you use a computer by looking at the pictures. When he grow up, he learn to read and write.” William Shotts, Jr

Shell and Terminal
Shell is a command-line interpreter sh,ash,bash,csh,ksh,zsh,busybox
Terminal or terminal emulators is a emulator to real shell (console) xterm, konsole, gnome-terminal

Managing Files
List Files ls
Create file touch
Copy file cp
Move file mv
Delete file rm
Display file cat - less - more

ls
-l long listing
-d directories
-h human readable sizes
-a all files
-w wide listing

Managing Directories
List directories ls
Make directory mkdir
Change to directory cd
Copy directory cp
Move directory mv
Remove directory rmdir
Current directory pwd

Interesting commands
Date and Time date
Calender cal
Manuals man
Information info

Interesting CLI Tricks
Playing music and video
Chatting and Web
Displaying Images
Tweeting from CLI
…
…
And the list is still going ^_^

How to get help
Man pages
Info pages
Google
Forums
IRC
Community
Do u want more ?

Working Multiple Files
Using the wild cards
* for multiple characters
? for single character
Using regex
To be covered later

Searching for Files
Using find
-name
-size
-type
-user

Redirection and Piping
put to file > get from file < append to file >> pipe | Note: more about redirecting of output in the bash sessions

Symbolic Links
What is links ?
Types of links
Soft links
Hard links
How to make a link ?

Linux Directories
/bin /sbin /home /etc /media /tmp /boot /dev
/root /usr/bin /usr/sbin /var/log /var/cache /lib /opt

Know more about your pc
CPU cat /proc/cpuinf
Memory cat /proc/meminfo
PCI Cards lspci
USB Devices lsusb
Network interfaces ifconfig
Free memory free -m
Monitor Working processes top

Permissions
Why Permissions ?
User,Group,Other
Read,Write,Execute
Permissions symbolically
r read u user
w write g group
x execute o other

Permissions - cont.
Permissions numerically
7 rwx 3 -wx 6 rw- 2 -w- 5 r-x 1 --x 4 r-- 0 ---
Change user chown
Change group chgrp
Change permissions chmod

References
Wikipedia
http://linuxzoo.net
http://grussell.org/ns/lectures.html
http://www.linuxawy.org/node/46
http://www.linuxawy.org/node/51

Questions

Thanks

http://www.eglug.fabrider.net	55
http://eglug.org	39
http://www.eglug.org	20
http://eglug.fabrider.net	5

Basic C L I

by Bahaa Salama on Sep 01, 2009

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Basic C L I — Presentation Transcript