Using sysdig to Troubleshoot like a boss

If you haven't seen it yet there is a new troubleshooting tool out called sysdig. It's been touted as strace meets tcpdump and well, it seems like it is living up to the hype. I would actually rather compare sysdig to SystemTap meets tcpdump, as it has the command line syntax of tcpdump but the power of SystemTap. In this article I am going to cover some basic and cool examples for sysdig, for a more complete list you can look over the sysdig wiki....

 · 8 min · Benjamin Cane

Understanding the kill command, and how to terminate processes in Linux

One of my biggest pet peeves as a Linux sysadmin is when I see users, or even other sysadmins using kill -9 on the first attempt to terminate a process. The reason this bugs me so much is because it shows either a lack of understanding of the kill command or just plain laziness. Rather than going on a long rant about why this is bad, I wanted to write an article about the kill command and how signal works in Linux....

 · 8 min · Benjamin Cane

Getting around the Linux directory structure with the cd command

Today is very much a “back to the basics” kind of day. In this article I am going to cover one of the most basic commands in Linux; the cd command. While today's article might be basic; it is always good even for experienced sysadmins, to look back at some of the basics and see if there are ways to improve your command line skills and Linux knowledge. The Linux/Unix directory structure Before getting into how to change to another directory, let's take a minute to cover how Linux's directory structure is laid out....

 · 5 min · Benjamin Cane

Sending redis traffic through an SSL tunnel with stunnel

Lately if you have been paying attention to tech or even mainstream media you might have seen a few stories about data breaches. Sometimes these data breaches have allowed attackers to gather unencrypted passwords or credit card numbers. In the past these types of attacks still happened, but there was not as many attacks as today and when they happened they were kept secret. With more and more internet based services becoming part of peoples lives, there is even more targets for attackers who are looking to get sensitive data....

 · 8 min · Benjamin Cane

Converting files from Windows format to Unix format with dos2unix

Ever run a shell script and get the following error? # ./dosfile.sh : bad interpreter: No such file or directory The error may look like there is a problem with your scripts SHEBANG where you specify the interpreter, so you go look and the line contains #!/bin/bash which is correct. So then you start wondering if there is a problem with the /bin/bash binary, and all sorts of thoughts of what would happen if /bin/bash was missing or broken start racing through your head....

 · 5 min · Benjamin Cane