NAME update-shells - update the list of valid login shells SYNOPSIS update-shells [ options ] DESCRIPTION ... update-shells locates the shells provided by packages from /usr/share/…NAME pam_shells - PAM module to check for valid login shell SYNOPSIS pam_shells.so DESCRIPTION ... shells is a PAM module that only allows access to the system if the userNAME add-shell - add shells to the list of valid login shells SYNOPSIS add-shell ... copies /etc/shells to /etc/shells.tmp , adds the given shells to this file if theyNAME remove-shell - remove shells from the list of valid login shells SYNOPSIS remove-shell ... /etc/shells.tmp and /etc/shells.tmp2 to remove the given shells from the list of val…names. It may be useful with shells that have programmable completion. -q , --quiet Use thisautologin to save memory by lazily spawning shells. -r , --chroot directory Change rootalso return process id's of shells running the named scripts. -z Try to detectautologin to save memory by lazily spawning shells. -r , --chroot directory Change root