I never thought of Linux will get into virus troubles.Unbelievbaly my computer crashed tow times a day(yestoday and today)!Maybe it like as Windows catching virus?Are there any anti-virus tools?Thanks.

There is clamav.

However you may be jumping to conclusions. I'd look for a hardware fault first.

1. CPU temperature. Do you have lm_sensors working? Does your BIOS setup have a page which displays temperatures and voltages? Are all your fans working? is your heatsink clogged up with dust?

2. Ribbon Cables. Try unplugging and reseating all the ribbon cables. Better still, if you have spares, try replacing them.

3. Memory test. Reseating the memory may help. else test it. You can download docmemory(boots from floppy) or memtest86 (boots from CD)

4. Reseat all the cards.

Does the PC crash under reproducible conditions - program being run, time of day (not kidding), somebody using a power tool or domestic appliance etc.

I've personally encountered ALL of these (thankfully not on the same PC!)

There is f-prot. I really enjoy it.

Also you should check logs.

In my opinion, until you are certain that there is a virus, you shouldn´t install an anti-virus. As davcefai showed, there are lots of things that can be happening.

90% of the times it's a kernel problem specifically with some internal hardware... try compiling a new kernel or installing another distro..

I never got a real unix virus in 6 years!!!

It's not going to be a virus, but if you had bothered to search, you'd have found many threads referencing clamav.

Thanks all!It is really not a virus.It is a kernal problem and I fixed it.

so clamav works on the full system? I was under the impression that is just scanned e-mail.

so clamav works on the full system?
In you need on-access scanning you'll have to install something like Dazuko.