How do I create a superuser from the command line in Ubuntu? [duplicate]

Question

Possible Duplicate:
How to create a admin user on ubuntu

How can I create a superuser in Ubuntu 11.10? I need to create it using the command line.

Either we could change a normal user to become a superuser, or we could create a superuser right away.

Answer 1

You can create a new user simply using the adduser(8) command.

To make it a user capable of performing sudo, add him to the admin group using either of the following commands:

sudo usermod -a -G admin <username>
sudo adduser <username> admin

This works because the admin group is predefined in /etc/sudoers. Note though that newer versions of Ubuntu will use sudo as group instead:

Until Ubuntu 11.10, the Unix group for administrators with root privileges through sudo had been admin. Starting with Ubuntu 12.04 LTS, it is now sudo, for compatibility with Debian and sudo itself. However, for backwards compatibility, admin group members are still recognized as administrators

For any other customization, refer to the Sudoers documentation.