systemctl enable webmin.service
systemctl start webmin.service

[root@reindeer yum.repos.d]# systemctl enable webmin.service
webmin.service is not a native service, redirecting to systemd-sysv-install.
Executing: /usr/lib/systemd/systemd-sysv-install enable webmin
[root@reindeer yum.repos.d]# systemctl start webmin.service
Job for webmin.service failed because the control process exited with error code.
See “systemctl status webmin.service” and “journalctl -xe” for details.
[root@reindeer yum.repos.d]#

The following did not work

firewall-cmd -permanent -zone=public -add-port=10000/tcp
firewall-cmd -reload

[root@reindeer ~]# firewall-cmd -permanent -zone=public -add-port=10000/tcp
usage: see firewall-cmd man page
firewall-cmd: error: unrecognized arguments: -permanent -zone=public -add-port=10000/tcp
[root@reindeer ~]# firewall-cmd -reload
usage: see firewall-cmd man page
firewall-cmd: error: unrecognized arguments: -reload

This is what shows up for netstat:
[root@reindeer ~]# netstat -plunt | grep 10000
tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN 22794/perl
udp 0 0 0.0.0.0:10000 0.0.0.0:* 22794/perl
[root@reindeer ~]#

The following:
you can login with root or with user with sudo wrights
Should be:
you can login with root or with user with sudo rights

I Hope This Helps