1. The Event MPM is no longer experimental and is fully supported – this gives greater performance ala nginx.
2. Conditionals in config – so you can have for example, a generalized config across multiple hosts with slightly different requirements. Similarly, you can have config file variables.
3. mod_remoteip – allows you to easily get the “true” client IP when behind load balancers.
4. mod_sed – rewrite input and output.
5. mod_auth_form – HTML login forms for basic authentication. Much easier for the end user than the unfriendly pop-up dialogue.
6. mod_ratelimit – very basic DOS protection.
7. mod_ssl supports sharing SSL session details across servers via memcached for performance.
8. mod_lua (experimental) allows hooks into Apache to be written in Lua!

Create a shell function in your ~/.profile like:


function pn() { pynag "$@" --cfg_file=/etc/icinga/icinga.cfg ;}


If you use icinga instead of nagios

Puppet 3 wants Ruby 1.8.7, Centos 5 supplies 1.8.5.

So to get round this, add this repo

Add then add a

exclude=ruby*

line to the updates section in /etc/yum.repos.d/CentOS-Base.repo

yum update && yum install ruby then you are good to install puppet from the PuppetLabs repo.