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Things I Wish I'd Known About Bash
Recently I wanted to deepen my understanding of bash by researching as much of it as possible. Because I felt bash is an often-used (and under-understood) technology, I ended up writing a book on it .
Ian Miell
For a few years I was ‘Head of DevOps’. Before I got that job title I’d done much the same work under other names, and since then I’ve watched the same work get called SRE, and then it seemed to morph towards platform engineering. If you’ve been in this industry for any length of time you’ll have seen titles come and…
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Key Git Concepts Explained the Hard Way
As an exercise, after finishing this article do the whole exercise again, but make a change to both origin/master and master and then do the fetch and merge to see what happens when a fast-forward is not possible.
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Ansible Techniques I Wish I’d Known Earlier
If you’ve ever spent ages waiting for an Ansible playbook to get through a bunch of tasks so yours can be tested, then this article is for you.
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Git log – The good parts
If you’re managing a complex git codebase with multiple developers, then you may well be using a tool like GitHub or BitBucket to delve into the history and figure out branch and merge issues.
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Strace – My Favourite Secret Weapon (2011)
I’m often asked in my technical troubleshooting job to solve problems that development teams can’t solve. Usually these do not involve knowledge of API calls or syntax, rather some kind of insight into what the right tool to use is, and why and how to use it. Probably because they’re not taught in college, developers…
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Things I Wish I'd Known Before Using Vagrant
One of the ironies of working a lot with Docker, Kubernetes, and OpenShift is that I’ve had to learn a lot about Vagrant and Virtualbox. Mostly I use it to spin up OpenShift clusters on my local machine, but I’ve had to poke into lots of corners to get various other things working too.
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Surprising Bash Variables
Continuing in the series of posts about lesser-known bash features , here I take you through seven variables that bash makes available that you may not have known about.
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Goodbye Docker: Purging Is Such Sweet Sorrow
This was triggered by a recurring incident I faced where the Docker daemon was using 100% CPU on multiple cores that made the host effectively unusable.
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More Things I Wish I’d Known About Bash
My previous post took off far more than I expected, so I thought I’d write another piece on less well-known bash features.
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Practical Shell Patterns I Use
Over the decades I’ve been using the shell, there are thousands of reusable patterns I’ve picked up from looking over others’ shoulders and googling.