txt

Add Line Numbers

Binny V A — Tue, 07 Jul 2009 18:20:33 +0000

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

Binny V A — Mon, 06 Jul 2009 18:28:41 +0000

Install a list of packages from a text file.


cat packages.txt | xargs apt-get install

Rename Command

Binny V A — Sat, 04 Jul 2009 18:27:49 +0000

Different way to use the rename command.


rename 's/.html$/.php/' *.html

Get a Random Futurama Quote

Binny V A — Fri, 03 Jul 2009 18:28:21 +0000

Useless - but fun - get a random Futurama Quote


curl -Is slashdot.org | egrep '^X-(F|B)' | cut -d \- -f 2

Create Random Password

Binny V A — Thu, 02 Jul 2009 17:47:27 +0000

Use this command to create a random password


< /dev/urandom tr -dc A-Za-z0-9_ | head -c8

Also see…

CDPATH

Binny V A — Mon, 29 Jun 2009 18:31:19 +0000

CDPATH is to cd what PATH is to exectable. You can go to a folder inside any of the CDPATH folders by just cd 'folder name' - no mater where you are currently.


export CDPATH='.:~:/var/www/html:~/Scripts'

Use ffmpeg to create a screencast

Binny V A — Sat, 27 Jun 2009 18:48:29 +0000

You can use this command to create a screencast using ffmpeg.


ffmpeg -f x11grab -s 800x600 -i :0.0 /tmp/screencast.mpg

Backup Del.icio.us posts

Binny V A — Thu, 25 Jun 2009 18:30:13 +0000

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

Binny V A — Wed, 24 Jun 2009 18:32:21 +0000

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

Binny V A — Sat, 20 Jun 2009 18:22:18 +0000

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 Article