All Episodes

Listing all 69 episodes

Introduction to Amazon Web Services (AWS)

Episode #29 - 2014-07-19 - 9 min
In this episode, I wanted to give you an introduction to Amazon Web Services (commonly referred to as AWS). AWS is one of the premier cloud providers, which is drastically changing the way many think about IT. This introductory episode lays the foundation for more advanced AWS episodes to come.

CLI Monday: cat, grep, awk, sort, and uniq

Episode #28 - 2014-07-14 - 9 min
In this episode, I would like to show you a series of commands for reviewing log data, how to extract event counts from that data, and finally how to create sparklines from those counts. This can be extremely useful for pointing you in the right direction while troubleshooting issues.

LVM Linear vs Striped Logical Volumes

Episode #27 - 2014-07-08 - 16 min
In this episode, I wanted to look at the performance characteristics between linear and striped logical volumes using LVM. We will examine what is happening behind the scenes along with some preliminary benchmarks using an AWS i2.8xlarge instance with 8x800GB SSD disks, 244GB of RAM, and 32 virtual cores.

CLI Monday: head, tail, and wc

Episode #26 - 2014-07-07 - 4 min
In this episode, I wanted to introduce a new episode type called CLI Monday. The idea being, we will review useful command line utilities every Monday. Today, we are going to review the head, tail, and wc commands.

Bits Sysadmins Should Know

Episode #25 - 2014-05-27 - 10 min
The following is a crash course on what I think goes into the making of a well rounded Linux Sysadmin. This episode is a semi-organized brain dump of bits I have learned throughout my career, which will be used as a type of guide, or road map, for future episodes on this site.

Introduction to Containers on Linux using LXC

Episode #24 - 2014-04-30 - 15 min
In this episode, I wanted to give you an Introduction to Containers on Linux using LXC. We will look at what Containers are as a concept, why they are useful, and then move onto a live demo of what a Container looks like on a real system using LXC.

Root Privileges and Automated Tasks

Episode #23 - 2014-04-27 - 7 min
In this episode, we will discuss giving automated tasks narrow root privileges via the sudo command using the nopasswd option.

Common Archive and Compression Formats

Episode #22 - 2014-04-24 - 11 min
In this episode, I wanted to talk about common archive and compression formats that you are likely to encounter on Linux machines. We will review the differences between archive and compression formats and then focus on how to create and extract these formats using various utilities.

Anatomy of a SQL Injection Attack leading to Code Execution

Episode #21 - 2014-01-02 - 15 min
In this episode, I am going to show you what a SQL injection attack is, along with how it works, and then we will look at several methods to prevent them. We will also look at how a SQL injection attack can reach far beyond the database.

How to write an Incident Report / Postmortem

Episode #20 - 2013-11-19 - 5 min
In this episode, I wanted to look at how to write an Incident Report, also referred to as a Postmortem. Rather than give you something of my own creation, lets look at a Google Incident Report from early 2013, which I think serves as a great example.