The default shell on Ubuntu is the Bash shell (shorthand for Bourne Again SHell).

Does Ubuntu use sh or Bash?

In Ubuntu 6.10, the default system shell, /bin/sh, was changed to dash (the Debian Almquist Shell); previously it had been bash (the GNU Bourne-Again Shell). The same change will affect users of Ubuntu 6.06 LTS upgrading directly to Ubuntu 8.04 LTS.

Does the Linux terminal Use Bash?

Using bash on the command line (Linux, OS X)

You can start using bash on most Linux and OS X operating systems by opening up a terminal. Let’s consider a simple hello world example.