Basic linux command guide / tutorial with command line examples for linux beginners

This link can be very useful for someone starting with Linux administration. This guide / tutorial covers all basic Linux commands and examples on command line using bash shell ( BASH ). It can also be use as a Linux command reference.
Linux Commands
enjoy your Linux commands training ..

Rip / backup / copy dvd to avi mpeg4 format with linux mencoder

1)
First identify the chapter which you would like to rip to avi mpeg4 format. Usually it is the biggest file on the dvd with extension *.vob . Other option is to use:
mplayer -identify -nosound -novideo dvd://
2)
Get and covert sound to mp3:
mencoder -oac mp3lame -lameopts br=96:cbr:vol=6 -ovc frameno -o dvdrip.avi dvd://1
3)
Get video:
run this command for [...]

Convert from mp3 to ogg and from ogg to mp3 format with soundconvert

First install soundconvert linux package. This allows you to convert between ogg and mp3 sound media formats. On debian or ubuntu simply:
apt-get install soundconvert
to convert from ogg format to mp3 format use command:
soundconvert.pl -o mp3 mediamusic.ogg
to convert from mp3 format to ogg format use command:
soundconvert.pl -o ogg mediamusic.mp3
If you wish to convert all files [...]