While there aren't many viruses for Linux right now and while Linux inherently makes virus writing harder they do happen, they will grow in number as the Linux user base grows (sadly).
...And statments like "linux is cool, you'll never see a virus again" will eventually make you look stoopid and will make people question the value of a great OS simply because they didn't prepare.
it would be like saying I don't know anyone that's been hit by a car so I don't need to look.
Here is wikipedia's entry on linux viruses. It is well sourced for accuracy.http://en.wikipedia.org/wiki/List_of_Li ... er_viruses
And here is why linux viruses don't last longhttp://librenix.com/?inode=21
Do not believe the suggestion that the Linux community is complacent or "behind the times" in terms of viruses, or any other security issue. Linux developers have not "ignored" viruses, rather the OS is built to be highly resistant to them and since the code is "Open" there are literally thousands of eyes watching ...
For the most part, Linux anti-virus programs scan for Windows viruses which do not run on Linux. There are increasing reports, however, that Windows malware may run in wine. And browser malware/spyware/"tracking cookies" are also easier to write.
Please understand, anti-virus programs, and in fact most HIDS, are "reactive" in that they can only protect you from known viruses. They can only protect you against malware after it is developed and incroporated into HIDS, not before. Furthermore the "fix" will be to close any hole(s) in the code, these fixes will be available through security updates (which are more frequent in Linux then your previous OS if you are coming from Windows).
Reasons AGAINST antivirus on Linux:
1. They scan primarily for Windows viruses.
2. There is a high rate of false positives.
3. Isolation/inoculation is poor.
4. And currently there are no known active Linux viruses (so there is essentially nothing to detect).
Reasons FOR antivirus on Linux:
* You are running a file or mail server with Windows clients.
* You wish to scan files before transferring them, by email, flash drive, etc., to a Windows machine.
It would also depend upon how proactive your were staying up to date on security advisories.
Also keep in mind a "virus" may also come in the form of malicous "help" commands. Some piece of code you found somewhere on the net to "fix" a problem. Here are some examples: http://ubuntuforums.org/announcement.php?a=54Browser / Spyware : Java/Flash/Ad-ware/Trackers/Cookies
This is where most users will have the most risk. We all want Java/Flash, but our Internet browser opens us to attacks.
I advise :
1. Deny all cookies and add trusted sites, allowing only for session.
2. Install NoScript. Again block all and add trusted sites to a white list.
3. Install Safe History
4. Adblocking : I block with a hosts file rather then Adblock Plus or Adblock Filterset.G because a hosts file protects more then just firefox.
* Linux script : http://hostsfile.mine.nu/downloads/updatehosts.sh.txtRoot kits
The term rootkit (also written as root kit) originally referred to a set of recompiled Unix tools such as ps, netstat, w and passwd that would carefully hide any trace of the intruder that those commands would normally display, thus allowing the intruders to maintain root access (highest privilege) on the system without the system administrator even seeing them.
The term is no longer restricted to Unix-based operating systems ...
Root kit detection:rkhunter
(for the install section just use equo)chkrootkit
(for the install section just use equo)
If you check the wiki, use the search function and google you can find the answer to most of your questions.
Remember to mark your thread [Solved] if your issue is fixed.