Common environment variables
Here is a list of common environment variables in Linux:
- USER – your current username.
- SHELL – the path to the current command shell (for example, /bin/bash).
- PWD – the current working directory.
- HOSTNAME – the hostname of the computer.
- HOME – your home directory.
- MAIL – the location of the user’s mail spool. Usually /var/spool/mail/USER.
- LANG – your current language.
- TZ – your time zone.
- PS1 – the default prompt in bash.
- TERM – the current terminal type (for example, xterm).
- DISPLAY – the display used by X. This variable is usually set to :0.0, which means the first display on the current computer.
- HISTFILESIZE – the maximum number of lines contained in the history file.
- EDITOR – the user’s preferred text editor.
- MANPATH – the list of directories to search for manual pages.
- OSTYPE – the type of operating system.