Thanks for any kind of help!
This one works for me.
tried, but no luck!
-> in recovery mode, I need to enter the admin password!
-> I am using an variation of Ubuntu, called startOS, http://en.wikipedia.org/wiki/StartOS
You might be out of luck. I'm not familiar with StartOS, but it sounds like it was designed to prevent you from resetting the Admin password if you forget it. And it sounds like its user hierarchy is more like Debian's than Ubuntu's.
Jane, stop this crazy thing!
There is still another way, but it's a bit more complicated. You need a liveCD for this. I've only done with an Ubuntu environment to fix another Ubuntu install, but I think StartOS liveCD should also work.
The how-to is here: http://www.makeuseof.com/tag/how-to-...inux-password/ It's about 4 years old, as is very obvious from the screenshots, but still works. Scroll down to the section that begins with "When you can’t use GRUB"
Note: it's a bit more simplified than the process I normally use, but it seems to work for resetting passwords.
Let us know how you get on.
https://en.wikipedia.org/wiki/StartOS & http://distrowatch.com/table.php?distribution=startos, sorry I can not offer any help.
I think it would be safe to try it, anyway. It will either work or not - it's not likely to screw anything up.
A quick google search shows references to SuSE and Arch. It's not just an Ubuntu/Debian thing.