Icinga2 is a rewrite of icinga, a fork of nagios. This will guide you in installation
Nix is a package manager like yum, apt-get and pacman. Find out what makes it better than any one you’ve used before
Drupal 8 is drastically different from Drupal 7. Learn more about why.
systemd is replacing all linux init systems (sysv, upstart, etc…)
Building on the last post, python fabric here is refined to use environments defined in yaml and setup role definitions