[root@centos7 ~]# chsh --help

Usage:
 chsh [options] [username]

Options:
 -s, --shell <shell>  specify login shell
 -l, --list-shells    print list of shells and exit

: shell의 list를 보여준다.

 -u, --help     display this help and exit
 -v, --version  output version information and exit

For more details see chsh(1).
 

[root@centos7 ~]# chsh -l
/bin/sh
/bin/bash
/usr/bin/sh
/usr/bin/bash
/bin/tcsh
/bin/csh
/bin/ksh
/bin/rksh