On Thu, Jul 12, 2007 at 06:28:04PM -0700, Carlos Daniel Ruvalcaba Valenzuela wrote: Please don't top-post. That's not standard for this list. I've fixed your message... > On 7/12/07, Rogelio Bastardo <scubacuda at gmail.com> wrote: > >Where/how in CentOS can I get a nice list of all the usernames on the > >system? This isn't really a CentOS specific question; this is generic Unix. > The file /etc/passwd should show all the system users (if you are > using local loging and not NIS or other remote authentication > systems), you will also see many systems users (like a user for > apache, mysql, etc). That will only work for local users. The answer you really want is "getent passwd". This handles everything nsswitch.conf does (NIS, LDAP, xyzzy, whatever). To get just a list of usernames: getent passwd | cut -d: -f1 | sort -u What it _doesn't_ do is handle specialised authentication; just because a person may have an account on a box doesn't mean a person can login or otherwise access the box. Naming services do _not_ match authentication and authorisation services. However, if your environment is that complicated then you shouldn't be asking such simple questions on this list :-) For a simple environment, or even a moderately complicated one (NIS, NIS+, LDAP with no specialised PAM rules) then "getent passwd" will do the job. -- rgds Stephen