cutsel(1) on Linux
The text 4d1b8797247d, as Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
show information about the X clipboard and the cutbuffer in sync
Flags it lists
-
-cutbuffer -
-d -
-debug -
-s -
-sel -
-select -
-selection -
-v -
-verbose