Open a terminal
Identify your shell configuration file
For Bash login shells, edit `~/.bash_profile` or `~/.profile`
For Bash interactive shells, edit `~/.bashrc`
Open the file with a text editor, such as `nano ~/.bashrc`, `vim ~/.bashrc`, or `code ~/.bashrc`
Add or modify the settings you want
Save the file and exit the editor
Apply the changes with `source ~/.bashrc`
Open a new terminal session if needed