Add Line Numbers

Use this command to add line numbers to a text file… sed = filename.txt | sed ‘N;s/\n/\t/’ > filename_number.txt

Install Package List

Install a list of packages from a text file. cat packages.txt | xargs apt-get install

Rename Command

Different way to use the rename command. rename ‘s/.html$/.php/’ *.html

Get a Random Futurama Quote

Useless – but fun – get a random Futurama Quote curl -Is slashdot.org | egrep ‘^X-(F|B)’ | cut -d \-…

Create Random Password

Use this command to create a random password < /dev/urandom tr -dc A-Za-z0-9_ | head -c8 Also see…

CDPATH

CDPATH is to cd what PATH is to exectable. You can go to a folder inside any of the CDPATH…

Use ffmpeg to create a screencast

You can use this command to create a screencast using ffmpeg. ffmpeg -f x11grab -s 800×600 -i :0.0 /tmp/screencast.mpg

Backup Del.icio.us posts

Backup all delicious bookmarks using this command wget –user=username –password=password https://api.del.icio.us/v1/posts/all -O bookmarks.xml

Replacing in Found Files

Replace one string by another in all file found by find. find . -name *whatyouwant* -exec perl -pi.bak -e ‘s/TEXT_TO_REPLACE/TEXT_TO_REPLACE_IT_WITH/g’…

Backup and Restore Boot sector

Use these commands to backup/restore your boot sector dd if=/dev/hda of=bootsector.img bs=512 count=1 # backup dd if=bootsector.img of=/dev/hda #restore Original…