If you would like to change the shell type for a specific user you can do the following.
In this example we will change the shell type for username jimmysmith to Bash:
chsh -s /bin/bash jimmysmith
If you have any questions feel free to leave me a note below and I will get back to you....
By wen, January 24, 2015
If you would like to disable shell access for a specific user you can do the following.
In this example we will disable shell access for username johnsmith:
chsh -s /bin/false johnsmith
Please note that this disables shell access for the user when they are logging in using the normal means. If the user is able to execute commands through a PHP/CGI script they can spawn their own shell.
By tilisha, January 24, 2015