Linux Hardening Guide
Some omissions IMO: never let people SSH in with a password, and for the love of god, stop leaving private SSH keys on servers. Privat SSH keys should never leave your physical proximity. They should be on your laptop, or desktop, or your yubikey, but never on servers. Also SSH agent forwarding is the devil. Don't do it.<p>Lots of really braindead advice in there too, like disabling RDRAND because there might be a backdoor.. come on.. even Linus knows that's obvious bullshit.[1]<p>[1] <a href="https://nakedsecurity.sophos.com/2013/09/11/rudest-man-in-linuxdom-rants-about-randomness-we-actually-know-what-we-are-doing-you-dont/" rel="nofollow">https://nakedsecurity.sophos.com/2013/09/11/rudest-man-in-li...</a>