You type in
bash. If you want this to be a permanent change the default shell to
/bin/bash by editing
Here's some snippets from my
The very last field contains the shell, Modifying the field after the last
: to a valid or invalid shell will work.
/sbin/nologin both mean the user doesn't have a real login shell, although if pam is not set up right this doesn't mean they can't login (I reported a bug on this in Arch Linux, because you can login graphically without having a login shell).
/bin/zsh are both valid shells, see
/etc/shells for a list of valid shells on your systems. Here's my
/etc/shells if you're interested.
Yes you can use
usermod to do the same things, please remember these are just structured text files, and TIMTOWTDI.