lifelesspoet: Linux doesn't need anti-malware, not because of limited market share, but by design. Windows and to a lesser extent, OSX, pretty much sell you a house with no doors, and expect you to hire security guards(antivirus and firewall) to examine everything coming in and out. Linux sells you a house with doors that lock, it pretty much cock-blocks any opportunity to execute code remotely. Combined with large package repositories with trusted open-source software, there's no reason to go to shady freeware sites to download applications. Closed-source is the enemy here, not market share.