Kernel parameters for hardening

/etc/security/limits.conf Concept /etc/security/limits.conf allows setting resource limits for users logged in via PAM. This is a useful way of preventing, for example, fork-bombs from using up all system resources. Note: The file does not affect system services. For systemd services the files /etc/systemd/system.conf, /etc/systemd/user.conf, and /etc/systemd/<systemd_unit>/override.conf control the limit. See the systemd-system.conf(5) man page for details. Config sample * soft nofile 160000 The syntax of the lines is as follows:


PGP and GPG PGP - Pretty Good Privacy GPG - GNU Privacy Guard oder GnuPG The Free Software Foundation has developed its own OpenPGP-compliant program called GNU Privacy Guard (abbreviated GnuPG or GPG). Install GPG on MacOS Installing homebrew first Refer to And install it. brew install gnupg Use GPG keygen Generate a key pair gpg --gen-key Real name: My Realname Email Address: (Okay) (Enter the pass) As a default, the key type is RSA 2048.