A couple of the most common ones are Bash and ZSH. Many different shells can be used on a Linux system. This allows for programs to ascertain which text editor it is that you prefer to use for editing Linux applications.
EDITOR – This environment variable is the default editor that is used to edit.HOME – This environment variable is the home directory of the current user on a Linux system.USER – This environment variable is the currently logged user on a Linux system.So, as either a brief refresher or an informative list, we’ll provide in easy examples below a complete list of some of the most common environment variables.