Can't set user's default shell

[Dave Shoreman]

When creating users it's possible they'll end up logging in through SSH, so it'd be nice if we could set the user's shell to something other than bash. A dropdown of shells discovered on the system would be fantastic, but not the most feasible. A basic text input defaulting to /bin/zsh would likely suffice.

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useradd

   -s, --shell SHELL
       The name of a new user's login shell.

       This option sets the SHELL variable in /etc/default/useradd.

usermod

   -s, --shell SHELL
       The name of the user's new login shell. Setting this field to blank causes
       the system to select the default login shell.