dotlock.mailutils(1) on Linux
The text a217039812c2, as Debian 4.0 (Etch) shipped it.
lock mail spool files
Flags it lists
-
--debug -
--force -
--help -
--retry -
--unlock -
--usage -
--version -
-? -
-V -
-d -
-f -
-r -
-u