Adduser user mail

A simple one!

To add a new user with a mail alias in Linux, you can use the useradd command followed by the name of the new user and the -m option to create the user's home directory and set the mail alias.

Here's the syntax:

useradd -m -d /path/to/home/directory -s /bin/false -a /etc/aliases/user mail

Let me break it down:

• useradd: The command to add a new user.
• -m: Create the user's home directory and set the mail alias.
• -d /path/to/home/directory: Specify the path to the user's home directory.
• -s /bin/false: Set the user's shell to /bin/false (this is a common practice for mail-only accounts).
• -a /etc/aliases/user: Set the mail alias to /etc/aliases/user.

For example, to add a new user named "john" with a mail alias "john" and a home directory /home/john, you would run:

useradd -m -d /home/john -s /bin/false -a /etc/aliases/john john

This will create a new user named "john" with a mail alias "john" and a home directory /home/john. The -s /bin/false option sets the user's shell to /bin/false, which means they won't be able to log in interactively.

Note that you'll need to create the /etc/aliases file and add the necessary entries for the mail alias to work.