Why am I seeing webmin in lsof output?
Solution 1:
webmin is associated with port 10000. lsof is "deducing" that webmin is what is running. For instance, if your app was bound to port 3306, lsof would think it was MySQL.
See this Wikipedia link for a list of well-known ports.
Solution 2:
It basically means that port 10000 is assocsiated with webmin in your /etc/services file.