Archive for the 'Command Line' Category

Command to Find Current Ubuntu Version

Run this command to find the installed version of Ubuntu…


cat /etc/lsb-release

top in Batch Mode

Run top in batch mode


top -b -d 10 -n 3

Trasfer over the network

Transfer stdin and stdout to and from machines over the network


ssh remote_machine 'cat - > file' < file

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 \- -f 2

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 folders by just cd 'folder name' – no mater where you are currently.


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

Use ffmpeg to create a screencast

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


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