Skip to content

Instantly share code, notes, and snippets.

View michaelbutler's full-sized avatar
💥
Reticulating splines...

Michael Butler michaelbutler

💥
Reticulating splines...
View GitHub Profile
@rxaviers
rxaviers / gist:7360908
Last active February 11, 2026 07:39
Complete list of github markdown emoji markup

People

:bowtie: :bowtie: 😄 :smile: 😆 :laughing:
😊 :blush: 😃 :smiley: ☺️ :relaxed:
😏 :smirk: 😍 :heart_eyes: 😘 :kissing_heart:
😚 :kissing_closed_eyes: 😳 :flushed: 😌 :relieved:
😆 :satisfied: 😁 :grin: 😉 :wink:
😜 :stuck_out_tongue_winking_eye: 😝 :stuck_out_tongue_closed_eyes: 😀 :grinning:
😗 :kissing: 😙 :kissing_smiling_eyes: 😛 :stuck_out_tongue:
@jboner
jboner / latency.txt
Last active February 11, 2026 06:12
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@ahmed-musallam
ahmed-musallam / compress_pdf.md
Last active February 10, 2026 18:10
How to compress PDF with ghostscript

How to compress PDF using ghostscript

As a developer, it bothers me when someone sends me a large pdf file compared to the number of pages. Recently, I recieved a 12MB scanned document for just one letter-sized page... so I got to googlin, like I usually do, and found ghostscript!

to learn more abot ghostscript (gs): https://www.ghostscript.com/

What we are interested in, is the gs command line tool, which provides many options for manipulating PDF, but we are interested in compressign those large PDF's into small yet legible documents.

credit goes to this answer on askubuntu forum: https://askubuntu.com/questions/3382/reduce-filesize-of-a-scanned-pdf/3387#3387?newreg=bceddef8bc334e5b88bbfd17a6e7c4f9

@CristinaSolana
CristinaSolana / gist:1885435
Created February 22, 2012 14:56
Keeping a fork up to date

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream
@thesamesam
thesamesam / xz-backdoor.md
Last active January 9, 2026 08:45
xz-utils backdoor situation (CVE-2024-3094)

FAQ on the xz-utils backdoor (CVE-2024-3094)

This is a living document. Everything in this document is made in good faith of being accurate, but like I just said; we don't yet know everything about what's going on.

Update: I've disabled comments as of 2025-01-26 to avoid everyone having notifications for something a year on if someone wants to suggest a correction. Folks are free to email to suggest corrections still, of course.

Background

@joaopizani
joaopizani / .screenrc
Created May 17, 2012 11:55
A killer GNU Screen Config
# the following two lines give a two-line status, with the current window highlighted
hardstatus alwayslastline
hardstatus string '%{= kG}[%{G}%H%? %1`%?%{g}][%= %{= kw}%-w%{+b yk} %n*%t%?(%u)%? %{-}%+w %=%{g}][%{B}%m/%d %{W}%C%A%{g}]'
# huge scrollback buffer
defscrollback 5000
# no welcome message
startup_message off
@michaelbutler
michaelbutler / Witcher_3_Linux_Easy_README.md
Last active January 4, 2026 17:29
Install and Play The Witcher 3 Complete Edition (GOG & GOG Galaxy) on Ubuntu Linux 20.04 with Lutris.net and Wine

How to install and play The Witcher 3 (GOG Edition) on Linux

It's really quite simple!

Step 1: Buy The Witcher 3 on gog.com

Simply go to https://www.gog.com/game/the_witcher_3_wild_hunt_game_of_the_year_edition (this should also work with the regular edition) and buy and add the game to your library.

Do NOT click "Download and Install" at this point. We will do this through Lutris.

@coolaj86
coolaj86 / Create a Bootable MacOS Recovery USB with Linux.md
Last active December 20, 2025 05:34
How to create Apple's Bootable MacOS Rescue Image from Linux

See bootableinstaller.com

How to create a Bootable MacOS Recovery USB from Linux

If your Mac is out-of-order or you otherwise cannot download macOS from the App Store, you can still create a bootable OS X recovery USB, and you can use that to create an Installer USB.

The downloads used in this process are legal and freely avaliable - including disk images directly from Apple's IT support pages, and open source utilities for extracting and converting pkg, dmg, and HFS+.

@pixelhandler
pixelhandler / pre-push.sh
Last active September 25, 2025 11:25
Git pre-push hook to prevent force pushing master branch
#!/bin/sh
# Called by "git push" after it has checked the remote status,
# but before anything has been pushed.
#
# If this script exits with a non-zero status nothing will be pushed.
#
# Steps to install, from the root directory of your repo...
# 1. Copy the file into your repo at `.git/hooks/pre-push`
# 2. Set executable permissions, run `chmod +x .git/hooks/pre-push`
@chadrien
chadrien / README.md
Last active August 24, 2025 21:28
Debug PHP in Docker with PHPStorm and Xdebug

Debug your PHP in Docker with Intellij/PHPStorm and Xdebug

  1. For your local dev, create a Dockerfile that is based on your production image and simply install xdebug into it. Exemple:
FROM php:5

RUN yes | pecl install xdebug \
&& echo "zend_extension=$(find /usr/local/lib/php/extensions/ -name xdebug.so)" > /usr/local/etc/php/conf.d/xdebug.ini \