[SYSADMIN] Serve your WordPress cached pages directly with lighttpd and not PHP

Optimizing Your WordPress Cache Loads in Lighttpd. If you don’t configure your wordpress virtual host properly in lighttpd, your wordpress cache will still make use of PHP. Wouldn’t it be nice if all those cached requests were served directy from the webserver as the static files that they are, bypassing the CPU/memory load PHP can […]

Solving a 2FA (2 Factor Authentication) nightmare involving Circle.com and Bitcoin

How to stop Twitter SMS notifications from 40404

Simply send a text message back to 40404 with the following text: STOP TWITTER If for some reason this no longer works, then just add the 40404 number to your blocked caller’s list. For me the “STOP TWITTER” text message did it. I was receiving text messages even though I didn’t have any mobile notifications […]

Things to think about when tuning libtorrent for high performance

An user on the libtorrent mailing list had the following problem: I’m doing some testing for a libtorrent application that will use a small number of peers (often just 1 seed and 1 downloaded) and high bandwidth delay product links (in the hundreds of Mb/s and 100ms+ round trip). I’m unable to get more than […]

command line speed test, see how fast is your server’s connection

Save the following script in a file called speed_test #!/bin/bash # Requirements # sudo apt-get install lftp iperf lftp -e ‘pget http://releases.ubuntu.com/14.04.3/ubuntu-14.04.3-desktop-amd64.iso; exit; ‘ make sure the file is executable: sudo chmod +x speed_test Once you have installed lftp and iperf make sure you have the script somewhere in your $PATH. The script basically downloads […]

IntelliJ / Adroid Studio / CLion / GoLand / PyCharm / PHPStorm keymap shortcuts I can’t live without

Download settings.jar (Import with `File -> Import Settings`) I got to IntelliJ after years of using Emacs and Eclipse. Here’s how my keymap looks now that I work with Jetbrains tools, these are the keyboard shortcuts I can’t live without as a programmer. Legend (Mac keyboard) ⌘ Command ⇧ Shift ⌘1 Show Intent Actions […]

How to create a list that holds different object types using `void*` in C.

I remember being in school back around 1998 and not knowing enough about C to do this. After coding in other languages, then going back to C++ and understanding at a lower level how references and pointers work, this was pretty easy to figure out. In this exercise I store elements of different types in […]

How to make a “foreach” function in JavaScript

I thought this would be a simple exercise in case of having to interview someone for a JavaScript position. “How would you make your own ‘foreach’ in JavaScript” I came up with the following solution: // // collection: A list of objects. // onElementIterationCallback: The function to be called on every element iterated // taking […]

Manifest on Internet’s Evolution

(Forgotten draft from May 31st 2010) I’m a little sad to see some of the paths the internet is taking lately. I personally think it’s enough about the infatuation that people have with “Social Networking”, enough, it’s boring and it makes us waste precious time as a race. Technology is coming together for you to […]

How to resize an EBS (xfs formatted) partition

First of all, create a snapshot of your EBS volume. Then out of that snapshot you will be able to create your new volume. However, when you detach the old one from your instance and attach the new one, you will still see the old available space with df look at my /dev/xvdf/ available space […]