Fixing CentOS Root Certificate Authority Issues

While trying to clone a repository from Github the other day on one of my EC2 servers and I ran into an SSL verification issue. As it turns out, Github renewed their SSL certificate (as people who are responsible about their web presence do when their certificate is about to expire). As a result, I couldn’t git clone over https. This presents a problem since all my deploys work using git clone over https.
Read the rest of this entry »

Posted in Security. Tags: , . 1 Comment »

Sharing a Screen Session

Anyone who has spent any time in a shell and has been cut off while working should know about screen. If not, then I recommend reading up on it (here or here). But I’m not here to tell you about screen as a general tool, I want to show you how to use it for screen sharing. I found a couple of forum posts and other scattered information, so here’s a little centralizing of information.
Read the rest of this entry »

Creating Configuration Files With Ruby Templates

I recently had a very repetitive configuration file that needed creating. There were approximately 50 config blocks of 10 lines each with only the host name changing with each block. So I decided to take a shortcut and do it in Ruby using ERB templates. This is so easy and literally save me hours worth of work.
Read the rest of this entry »

Nagios notify-by-campfire Plugin

Since one of the core communication methods for my company amongst engineers is 37Signals Campfire and Nagios is one of our main monitoring tools for all of our applications and services, I thought it would be a good idea to combine the two. So with a few simple additions to the Nagios configuration and a Ruby Campfire script, you can get this up and running.
Read the rest of this entry »