I dug up an old server that is only running CLI, and can't seem to remember if Webmin was installed on the machine or not. I normally implement it on all machines, but it doesn't seem like it's working on this one.
Is there a quick command to check to see if it's installed or a directory that Webmin has to exist?
It should be in /usr/share/webmin
so try
ls /usr/share/
or trywhereis webmin
Alternately try
sudo dpkg --get-selections
, to list all packages.The quickest way to see if its installed would be to launch a borwser and try loading up the web interface.
https://domain.com:10000