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Set up a cheap cloud hosted adblocker in an hour for $2.50 a month
👋 Linux commands, bash scripts, and tech pro-tips.
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My VM is lighter and safer than your container
My VM is lighter (and safer) than your container Manco et al., SOSP’17 Can we have the improved isolation of VMs, with the efficiency of containers? In today’s paper choice the authors investigate …
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Hanging S3 downloads
Large downloads work from all other servers, but fail from S3. Must be a problem on their end, right?
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Why Databases Are Not for Docker Containers
If we attentively look at IT industry at 2017, all of us will see “containers” and “Docker” as the top buzzwords ever. We started to package developed software in Docker containers in every field. …
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Host your own contacts and calendars and share them across devices
I'm trying to learn ways to minimize my reliance upon large companies for handling my day-to-day personal data. So I figured calendar and contacts should be on my list of things to self-host. This post is about how I migrated all my Google calendars and phone contacts to my own server without losing any features...
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What I Learned Managing Site Reliability for Some of the Busiest Gambling Sites
tl;dr For several years I managed the 3rd line site reliability operation for many of the world’s busiest gambling sites, working for a little-known company that built and ran the core backen…
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HAProxy vs. Nginx for load balancing (2016)
Load balancers are the point of entrance to the datacenter. They are on the critical path to access anything and everything. That give them some interesting characteristics. First, they are the mos…
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New in Debian stable Stretch: nftables
Debian Stretch stable includes the nftables framework, ready to use.Created by the Netfilter project itself, nftables is the firewalling toolthat replaces th...
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Golang SSH Redux
I’ll cover the post/blog, and then I’d like to counter some misconceptions. While part of me thinks “I must’ve been very unclear to have so many people misunderstand”, I also saw how many people commented without bothering to read, so really there’s a limit to how much self-flagellation will happen.
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Deprecated Linux networking commands and their replacements
In my article detailing the command line utilities available for configuring and troubleshooting network properties on Windows and Linux, I mentioned some Linux tools that, while still included and…
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Systemd Sucks, Long Live Systemd
systemd seems to be a dividing force in the Linux community. There doesn’t seem to be a middle ground to...
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How I Reduced My DB Server Load by 80%
Database load can be a silent performance killer. I’ve been optimizing the query performance of a web app I run designed to get people involved in open sourc...
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Faktory, a new background job system
Yesterday I explained how a good background job framework is critical to scaling business applications. Today, meet Faktory. I’ve spent the last six months building Faktory, a new background job system which aims to bring the best practices developed over the last five years in Sidekiq to every programming language…
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How Torch broke ls and made me vulnerable
If used incorrectly, LD_LIBRARY_PATH can cause a plethora of issues
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Awk driven IoT
With a Raspberry Pi or other modern single-board computers, you can make very simple toys. I started with the hello world of interactive apps: the soundboard. But even then, I was too ambitious. The soundpad Since the main target was kids. I wanted a simple, screen-less toy that would teach …
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Using cgroups to limit I/O
Developers running their apps on tsuru can choose plans based on memory and cpu usage. We were looking at adding I/O usage as one of the plan’s features, so one could choose how many I/O operations per second or bytes per second a container may be able to read/write. Being able to limit I/O is particulary important…
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Disable transparent hugepages
tl;dr “Transparent Hugepages” is a Linux kernel feature intended to improve performance by making more efficient use of your processor’s memory-mapping hardware. It is enabled ("enabled=always") by default in most Linux distributions. Transparent Hugepages gives some applications a small performance improvement (~ 10%…
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Golang: Don't be afraid of makefiles
I’m using Golang for a while. During the development, I was used to repeatedly execute “go build”,“go test” manually. This was a bad habit on which I resign. It is not so painful if you use simple command without any args. But in case of more complex tasks, naturally, it is going to be a…
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Home computing for $5/month
As a programming father you need to be concerned about your budget. This means resisting the temptation to buy the most amazing hardware, an...
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Docker in Production: An Update
The previous article Docker in Production: A History of Failure was quite a hit. After long discussions, hundreds of feedbacks, thousands of comments, meetings with various individuals and major pl…