To add a user to the system on the commandline, I usually use the
# adduser newuser
And that's it. I've been using that command probably out of an old
habit, since I've been a long-time Slackware user before. But now I
wanted to dig a bit deeper, and some details puzzle me.
Whereas on Slackware, 'adduser' is an interactive shell script to create
a user so that basically you don't have to memorize all the 'useradd'
switches, CentOS' 'adduser' is a mere symbolic link to 'useradd'.
But when I add a new user (# adduser newuser), I don't use any switches,
say to specify the shell, the home directory, the password expiration
delay, etcetera. I understand that it is Red Hat (CentOS) tradition to
create a separate group for each user. For example, user kikinovak also
belongs to a group kikinovak. And when I create a new user 'newuser',
the 'newuser' group also got somehow created. Plus, the new user also
seems to have his own user profile, with a default .bashrc and so on. My
only explanation for that is that CentOS' 'useradd' command doesn't work
like the traditional UNIX useradd command and uses a few switches by
default. Please correct me if I'm wrong.
Any light on this?
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