update-passwd(8) on Linux
The text 87955d6928e4, as Debian 7 (Wheezy) shipped it.
safely update /etc/passwd, /etc/shadow and /etc/group
Flags it lists
-
--dry-run -
--group -
--group-master -
--help -
--no-locking -
--passwd -
--passwd-master -
--sanity-check -
--shadow -
--verbose -
--version -
-G -
-L -
-P -
-S -
-V -
-g -
-h -
-n -
-p -
-s -
-v