Unix shell provides environment variables. To see the entire list of environment variables, use:
set
These environment variables can be used by the shell, programs or commands.
For example, the $PS1
variable is used by the shell to display the prompt. To change your prompt, you can try:
PS1='xxx>>'
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.
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