Unix shell provides environment variables. To see the entire list of environment variables, use:
These environment variables can be used by the shell, programs or commands.
For example, $PS1 variable is used by the shell to display the prompt. To change your prompt, you can try:
The environment variable $PATH is a list of directories separated by a colon. It is used by the shell to find the file corresponding to a command.
15 Create File
17 Copy File