Fixing Shell for Root user
 

Since I have recently changed to the Fish Shell, I had used chsh to change it for my main user account. When I su'd later I realized I hadn't changed it here, so I did it again. However, I apparently typed in the wrong path (I guess I should have gone ahead and done cat /etc/shells again). Now whenever I try to su it simply says "No shell".

I know there is a file for this some where as I have come across it before but I cannot seem to find it. How can I change the default shell? I also am not in the sudoers file so I can't exactly use sudo (help appreciated there) but I believe I can access root by using Ctrl+Alt+F1 and logging in there.

The file is /etc/passwd

If you can't manage to log in as root to modify it, try booting from a CD or DVD. Or if you dual-boot with Windoze, you can see your Linux partitions with a utility called Ext2 IFS.

If su doesn't work, then logging in directly as root is unlikely to work either, since exec'ing the shell is the same in each case. The easiest solution is to reboot and add 'init=/bin/sh' to the boot command line. Edit /etc/passwd, then exec /sbin/init to continue the normal boot process.