Package xsel

Command line clipboard and X selection tool

http://www.vergenet.net/~conrad/software/xsel/

XSel is a command line or script utility, similar to xclip, that can copy the
primary and secondary X selection, or any highlighted text, to or from a file,
stdin or stdout. It can also append to and delete the clipboard or buffer that
you would paste with the middle mouse button.

General Commands
Command Description
xsel.1x manipulate the X selection.