[Freebsd] – abilitare il su

su – how to become a super user. avoid using root

If you're like most people new to Unix, you do everything as root. You
shouldn't. I know I don't follow my own advice, but I'm trying to
improve.

Create yourself another account. Use that instead of root. Unless you
really need root. You can always invoke su to become a super user.
That way, you don't have to log out and back in every time you need the
power.

wheel

Only users in the wheel group can run su. The group can be specified
when creating a user via adduser. To add a user manuall, just put the
name of the user at the end of the line in /etc/group. For example:

wheel:*:0:root,marc

This adds the user marc to the wheel group.

su

To become super user, you do this:

bash-2.02$ su
Password:
su-2.02#

At the password prompt, supply the root password.

Note that you might also want to use either the -l or the -m options.
Respectively, these options will simulate a full login or leave the
environment unmodified. see man su
<http://www.freebsd.org/cgi/man.cgi?query=su&apropos=0&sektion=0&manpath=FreeBSD+2.2.8-RELEASE&format=html>
for details.