?– zsh (Z Shell) The Z Shell is an improved version of the bash shell.
As a Linux administrator,
you will be expected to be very familiar
with the Linux command-line interface.
Therefore, the Linux+ exam requires you
to know how to complete Linux tasks
using this type of interface.
18 Chapter 1: Introducing Linux
When you first boot your Linux system and log in, your default shell is loaded.
You can identify which shell you??™re using by entering env at the current shell
prompt. The env command lists all the environment variables for the currently
logged-in user. One of the variables is the shell in use, as shown next.
In the figure above, the bash shell is the default shell for the rtracy user account,
as indicated by the SHELL variable.
However, you??™re not stuck with the default shell. If you want to switch to a
different shell, simply enter the shell command at the prompt. For example, if you
are currently using the bash shell and want to use zsh instead, simply enter zsh at the
prompt. This is shown in the following illustration.
To stop using the new shell and revert back to the original shell, simply enter
exit, as shown next.
Back in the ???old days??? of DOS, you could only run one command-interpreter
session at a time.
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