Do you use Pingdom to monitor your server's uptime? Do you also use a firewall management tool to make it easier to manage iptables or another firewall, but don't allow your server to respond to ping for whatever reason? Pingdom makes a list of their current IP's available via an RSS feed on their site. But that list is separated by new lines, and some tools would rather you give them a comma-separated list. The wget and perl parts were found here.
We've all done it. When we needed to find something in a log, we just did a cat or a tail and piped it to grep. Maybe we told grep to also show us X lines before and after what it found. That works fine and dandy when you've got just one or two servers. But what about 30, or 300, or 3000?
This is really more of a note to myself. Unfortunately over time, I've been spoiled by Puppet and sometimes forget how to do things the manual way.