By default, most users are running the bash
shell.
Files that control the bash shell include the .bashrc
file, which you are free to view and edit:
cd
cat .bashrc
atom .bashrc
In the .bashrc
you can create aliases and set environment variables.
There are, however, other shells you can run, such as zsh
and fish
.
You can run these shells right from the command line (try typing fish
), or use the chsh
command to change your default shell (i.e., which shell is started, every time you log in).