XClip
Get data from clipboard
To get the data from the clipboard do the following command:
$xclip -sel clip -o
To put data into the clipboard, do:
$echo "Something" | xclip -sel clip
To process the whatever is on the clipboard and put it back in:
$xclip -sel clip -o | sed -e "s/whatever/nothing/g" | xclip -sel clip