I suspend that my Linux machine was hacked by someone.
Some of my bin files are changed and the permission is quite strange, say some are changed to UID with 500, which is definitely not a user in my account.
One of my friends is also suffer from that attack, but he said he just recover the machine by copying the bin files from another machine one by one, but I think it's really trouble and unclean.
Do you have any converient solutions? (except reinstalling the machine)
p.s. my machine works fine..........except some bin files are changed.