Yum Plugins: Verifying packages and configurations with Yum Verify

While taking a Red Hat Training course the instructor showed us a Yum plugin called verify. I've never used any of the Yum plugins before and after a while of playing with Yum Verify, I have decided that I should share this very cool plugin and introduce others to Yum plugins. What are Yum Plugins Yum plugins are packages that can be installed to provide extra functionality to the Yellowdog Update Manager or yum....

 · 4 min · Benjamin Cane

Installing Redis and setting up Master - Slave Replication

Over the past few years the usage of NOSQL databases has grown quite a bit. Part of this popularity is due to the scalability and performance seen with NOSQL solutions, one of those highly performant databases is Redis. Redis is an highly popular open source in memory key - value data store that is currently in use at and highly praised by tech companies such as Twitter, Stack Exchange and Github....

 · 5 min · Benjamin Cane

Managing DNS locally with /etc/hosts

Before the advent of a distributed domain name system; networked computers used local files to map hostnames to IP addresses. On Unix systems this file was named /etc/hosts or “the hosts file”. In those days, networks were small and managing a file with a handful of hosts was easy. However as the networks grew so did the methods of mapping hostnames and IP addresses. In modern days with the internet totaling at somewhere around 246 million domain names (as of 2012) the hosts file has been replaced with a more scalable distributed DNS service....

 · 6 min · Benjamin Cane

Install RackTables and start tracking your IP address inventory

Recently while I was scouring through a spreadsheet of “unallocated” IP addresses, I thought to myself. There has to be a better way to manage an inventory of IP addresses, and while I'm at it maybe even provide a list of provisioned servers. After some googling I found myself on RackTables.org the home of an open source project that aims to provide just what I was looking for. An Inventory system that tracks and manages Servers, Racks, IP Addresses and just about everything else in a data center....

 · 6 min · Benjamin Cane

Symlinks vs Hardlinks and how to create them

In a previous article I covered a little bit about Symlinks and Hardlinks but I never really explained what they are or how to create them. Today I am going to cover how to create both Symlinks and Hardlinks and what the difference is between the two. What are Symlinks and Hardlinks Hard Links In Linux when you perform an listing in a directory the listing is actually is a list of references that map to an inode....

 · 7 min · Benjamin Cane