My Ubuntu 12.04 suddenly rebooted after working great for a month. I checked and saw that all my downloads,installed programs and bookmarks are gone. It looks like a fresh installation all together.
I wanted to check what the issue is but I can't become root:
guest-EelhlO@paddington-MS-7327:~$ sudo -s sudo: unable to change to sudoers gid: Operation not permitted sudo: setresuid() [0, 0, 0] -> [117, -1, -1]: Operation not permitted
I cannot even ping in the terminal:
guest-EelhlO@paddington-MS-7327:~$ ping 220.127.116.11 ping: icmp open socket: Permission denied
How can I resolve this?