So I noticed, everytime I login I have 18 updates. Webmin needs updating. Deja Vu. So it seems that everything works. The SD is writable and I can edit files. When I reboot the pi, everything, all changes are reverted to before I did anything. Bad SD? Met it's write limit? I can image it and put on a new SD, but I have to climb up there and get it....ugh. Input? Ideas?
Same problem yesterday, card suddenly became read only. Strange thing that it looks OK, I can edit files, save changes and after some time card is reverted to previous state. New card, problem solved. If your Pi is not easily accessible, invest money in better SD card.