When I was running Caldera’s OpenDesktop more than 3 years ago, I remember using Webmin to do quick changes to the system. I have no idea why I used it, but it did the job.
Webmin, actually a couple of scripts written in Perl was initially to become a commercial product after Caldera decided to sponsor the project in 2000. I’m pleased to see that the project still comes with a lenient license (BSD in this case). Plus that the project appears to be alive.