pam_shells

Require valid shell

$ auth required pam_shells.so

$ account required pam_shells.so

pam_shells.so

pam_shells validates user shells. Checks shell in /etc/shells.
The module denies invalid shells. Security access control.

No parameters. Checks /etc/shells.

Requires /etc/shells. Fails for unlisted shells.

pam_shells ensures users have a valid shell listed in /etc/shells.

pam(8), shells(5), chsh(1)