Xclip
From wikinotes
xclip is a cli interface for your clipboard.
Documentation
github https://github.com/astrand/xclip man xclip
https://man.archlinux.org/man/extra/xclip/xclip.1.en
Usage
# copy 'foo' to selection-buffer (shift+ins) echo foo | xclip # copy 'foo' to clipboard (ctrl+v, alt+shift+ins) echo foo | xclip -selection clipboard # dump contents of secondary clipboard xclip -o -selection secondary