/shells

 1# /etc/shells: valid login shells
 2/bin/csh
 3/bin/sh
 4/usr/bin/es
 5/usr/bin/ksh
 6/bin/ksh
 7/usr/bin/rc
 8/usr/bin/tcsh
 9/bin/tcsh
10/usr/bin/esh
11/bin/dash
12/bin/bash
13/bin/rbash
14/usr/bin/screen
15/bin/bash-static