References
• https://help.ubuntu.com/community/InstallingSecurityTools—Ubuntu community documentation of and suggestions for various security tools.
• www.insecure.org/nmap/—This site contains information on Nmap.
• www.securityfocus.com/—The Security Focus website.
• www.tripwire.org—Information and download links for the open-source version of Tripwire.
• www.ubuntu.com/usn—The official Ubuntu security notices list; well worth keeping an eye on.
• https://help.ubuntu.com/community/UFW—Ubuntu community documentation for UFW.
• https://wiki.ubuntu.com/UncomplicatedFirewall—Ubuntu documentation for UFW.
• https://help.ubuntu.com/community/AppArmor—Ubuntu community documentation for AppArmor.
• www.novell.com/linux/security/apparmor/—Novell’s ...
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