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@mwidmann
mwidmann / add_local_trusted_ca_for_valid_https.md
Last active May 9, 2022
Generating trusted SSL keys for development
View add_local_trusted_ca_for_valid_https.md

Generating SSL keys for development

Installation

Thanks to minica it is very easy to create trusted SSL certificates that have a very long expiration date.

In order to get started you have to have the go tools installed and set up correctly in your environment.

Setup

@connorjan
connorjan / rsub.md
Last active Apr 19, 2022
Editing Files Remotely via SSH on SublimeText 3
View rsub.md

Editing Files Remotely via SSH on SublimeText 3

Sometimes you need to edit a file on a remote server, but using vim/emacs is not very practical, due to lag and speed of screen refresh.

TextMate users have the classic rmate, but it was implemented in Ruby, which may not be available on the remote server.

A better option is to use this version of rmate, implemented in pure Bash. It's a single file, self-contained, and with no external dependencies.

Step by step:

@fntlnz
fntlnz / self-signed-certificate-with-custom-ca.md
Last active May 24, 2022
Self Signed Certificate with Custom Root CA
View self-signed-certificate-with-custom-ca.md

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096
@joewiz
joewiz / post-mortem.md
Last active May 18, 2022
Recovery from nginx "Too many open files" error on Amazon AWS Linux
View post-mortem.md

On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files)

2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

  1. * Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
  2. Added fs.file-max = 70000 to /etc/sysctl.conf
View Bahceli.php
<?php
class Bahceli {
function __call($name, $args) {
if (preg_match('/yak|dov/i', $name)) {
return true;
} else {
return false;
}
}
@kevin-smets
kevin-smets / iterm2-solarized.md
Last active May 27, 2022
iTerm2 + Oh My Zsh + Solarized color scheme + Source Code Pro Powerline + Font Awesome + [Powerlevel10k] - (macOS)
View iterm2-solarized.md

Default

Default

Powerlevel10k

Powerlevel10k

@denji
denji / nginx-tuning.md
Last active May 27, 2022
NGINX tuning for best performance
View nginx-tuning.md

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.