Fixed! It wasn't so tragic as it seemed. I found one other linux cd, boot from it and checked /etc files. I found that I was somehow kicked out from every group in /etc/group file. After adding myself back and reboot, things went back to normal.
-- [Gutsy]Sudo suddenly stopped working https://bugs.launchpad.net/bugs/151201 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
