tag(3) on Linux
The text 51e9fa30b1b5, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
Manipulate tagged files
Flags it lists
-
-contains -
-earlier -
-exists -
-in -
-later