ntpleapfetch(8) on Linux
The text d0e9b614129a, as Debian 10 (Buster) shipped it.
leap-seconds file manager/updater
Flags it lists
-
--version -
-4 -
-6 -
-F -
-L -
-P -
-V -
-Z -
-c -
-e -
-f -
-h -
-i -
-l -
-p -
-q -
-r -
-s -
-t -
-v -
-z