I'm new to Linux. My Ubuntu 13 is now meeting problem such the CPU rate is about 100% ever time and the System Drive Disk Usage is full. I think the virus is attacking my computer. Are there any ways i can do to restore it to the previous point or to make it new?
While I cannot exclude that your computer has caught some malware, I doubt very much that your problems are caused by a virus. Or do you have other evidence, probably suspicious files? (In fact, most malware tries to act inconspicuously, and not alarming you with much activity.)
You should first try to find out which process is running amok on your system, e.g. by running
top in a terminal window. It should show you the processes causing the most CPU load at the top. Your system drive is probably being filled with log data from this berserk process. You should look at typical places for that:
ls -l $HOME/.xsession-errors
ls -lSr /var/log/
are candidates for growing log files and could give you some hints. (
-lSr means: 'l'ong listing, sort by 'S'ize, 'r'everse order, which means you get a long list of all files in
/var/log/ with the largest ones listed last. )
Next step would be to find out what caused that process to misbehave. But that depends on the process. Only if that does not work I would think about reinstalling.