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I know that the odds of getting a virus on Linux is infinitesimally small, but I still want something I can use to scan my computer every month or so to be safe. So far, though, all I found is things that scan for Windows viruses. Is there anything that will check for Linux?
Mind you, it will mainly be picking out windoze viruses. Maybe a few mac ones. Get a firewall,and close open doors, make your passwords secure. Those sort of things save you in linux. My sshd showed for a while through the router and I used get script kiddies trying to guess passwords and polluting my logs.
If you use samba and share files with Windows computers, then running something like a clamav plugin is a good idea. Your distro may have security check cronies jobs to look for insecure changes like world writable directories or SUID files. Servers are set up differently with more separate partitions, allowing each one to be mounted with different options. For example, a directory with a world writable permissions like /temporary should be on a partition mounted with the noexec,nolib,nosuid mount options. The /boot, /etc and /lib directories should be on a partition mounted read only.
Use selinux, grsecurity or apparmor to protect services.
Use rkhunter to scan for root kits and suspicious processes.
The term virus is almost obsolete. You need to worry more about malware on sites you visit and "crims" trying to break a service and installing a rootkit.
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