Run top in batch mode

top -b -d 10 -n 3

Transfer stdin and stdout to and from machines over the network

ssh remote_machine 'cat - > file' < file

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

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

Use this command to move files from folders two level deep to the current folder…

mv */*.* .

This is the command used to post a new task to the nexty GTD tool.

curl --basic --user "binnyva:password" --cookie-jar /tmp/nexty-cookies.txt --data-ascii "task=`echo $@|tr ' ' '+'`&layout=cli" "http://nexty.org/tasks/add.php"

Show rpm packages of a group software

rpm -qg "System Environment/Daemons"

Delete leading whitespace (spaces/tabs/etc) from beginning of each line

ruby -pe 'gsub(/^\s+/, "")' < file.txt

Double space a file with Ruby using the command

ruby -pe 'puts' < file.txt

Show list of files provided by a rpm package installed

rpm -ql package_name

Command to push the current repository in git to a online server

git push