I had just had a lot of fun. On my linux box I downloaded a package for mySQL. And I am an idiot. I was in a hurry to get it done and over with so I could get my Server running again. The objective: to compile a more updated version of mySQL so I could utilize more and better features.
First mistake: After I had downloaded it to /tmp under a regular user I changed ownership to root.
Second mistake: I neglected to check the md5sum
First Success: Backed up all important documents and configurations.
Third Mistake: I backed up the corrupted package without veriifying...
Fourth Mistake: I unzipped (so to say) the package. (as root)
Fifth Mistake: ran './configure' as root
Sixth Mistake (FATAL): I ran make as root.
Now normally this is just bad but how unlucky for me, for the FIRST time I make an exception to my security policy about NO ROOT, I get screwed. The package was corrupted and because it took so long to compile I let it run over night (like I did before as a REGULAR USER). In Make (I assume) there was a hidden surprise... 'crash-me' After compiling it, it ran it (i assume again) and well... Next morning I see that the monitor is not getting anythiung. I try telnetting... nothign, i try thousands of methods I normally use. Nothing, the computer is officially SHOT.
I restart it, it runs up as normal, here comes the file system check.
And I do so, and run through the normal process of point->fix->check->format blocksCode:Filesystem: / has an unacceptable amount of disconstigencies and corrupted blocks, please run fsck. Enter root passwd for system repair:
That took a while... And that was a lot of fun.
So I restart again, come back to it, my other file systems were all right, I guess the 'crash-me' was just trying to ........ me off.
I ran the backup, got everything back to normal, and checked the md5sum of the file. It ALMOST matched it. The first 3 chars were the same but the last 3 chars were different (normally, for speed I just check the first 3 and last 3 because it is hard to duplicate a program that matches).
Well, now LInux is working again. I didn't need to reformat or anything but this is a perfect example of why you shouldn't perform user tasks as root!
I really REALLY should have known better. My JOB is security. I guess I don't take security very seriously at home...
I don't know if it was a virus or just some stupid program to mess up my filesystem but whatever it is, its rare, and rarely effective on linux, if the user has half a brain. I guess I misplaced mine today.
So, this is just a life story and an example, now I need to re-evaluate my system, my skills and my policies for security. SIGH