# xsel > X11 selection and clipboard manipulation tool. > More information: . - Use a command's output as input of the clipboard (equivalent to ``): `echo 123 | xsel {{[-ib|--input --clipboard]}}` - Use the contents of a file as input of the clipboard: `cat {{path/to/file}} | xsel {{[-ib|--input --clipboard]}}` - Output the clipboard's contents into the terminal (equivalent to ``): `xsel {{[-ob|--output --clipboard]}}` - Output the clipboard's contents into a file: `xsel {{[-ob|--output --clipboard]}} > {{path/to/file}}` - Clear the clipboard: `xsel {{[-cb|--clear --clipboard]}}` - Output the X11 primary selection's contents into the terminal (equivalent to a mouse ``): `xsel {{[-op|--output --primary]}}`