Add or change user database information, including login shell and password. See also:
passwd
. More information: https://man.openbsd.org/chsh.
su -c chpass
chpass -s path/to/shell
chpass chsh -s path/to/shell username
passwd
file format:su -c 'chpass -a username:encrypted_password:uid:gid:... -s path/to/file' username
su -c 'chpass -l -s path/to/shell' username
su -c 'chpass -y -s path/to/shell' username