MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

ogrrd

Never touch your local /etc/hosts file in OS X again

To setup your computer to work with *.test domains, e.g. project.test, awesome.test and so on, without having to add to your hosts file each time.

Requirements

• Homebrew
• Mountain Lion -> High Sierra

Install

QueuingKoala

# Assumptions: easyrsa3 available in current dir, and functional openssl.
# This basic example puts the "offline" and "sub" PKI dirs on the same system.
# A real-world setup would use different systems and transport the public components.

# Build root CA:
EASYRSA_PKI=offline ./easyrsa init-pki
EASYRSA_PKI=offline ./easyrsa build-ca nopass

# Build sub-CA request:
EASYRSA_PKI=sub ./easyrsa init-pki

bcantoni

# -*- mode: ruby -*-
# vi: set ft=ruby :

# test setting a guest environment variable based on a host environment variable
# if FOO_BAR is set locally, create command to add it to .profile in the guest

env_var_cmd = ""
if ENV['FOO_BAR']
  value = ENV['FOO_BAR']
  env_var_cmd = <<CMD

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

gituser768

#include <GL/freeglut.h>
#include <vector>
#include <cmath>

const double pi = 3.141593;

typedef struct PhysVector {
  float x;
  float y;
};

JamesMessinger

GitHub Markdown Theme for Visual Studio Code

This CSS stylesheet allows you to preview markdown files in VSCode using GitHub's mardown theme. This CSS was taken directly from the official GitHub Markdown repo. I replaced their top-level .markdown-body class with the body tag so it would work in VSCode, and added styling for the html tag to match GitHub's fixed-width container.

Instructions

1. Copy the CSS file to your computer
   Copy the github-markdown.css file below to your computer. You can put it anywhere you want, but I chose to put it in the same folder as my VSCode settings file.

2. Edit your VSCode settings
   If you want to use this theme for all of your projects, then edit your User Settings file. If you just want to use this them

Tristor

#!/bin/bash
# Flushing all rules
iptables -F FORWARD
iptables -F INPUT
iptables -F OUTPUT
iptables -X
# Setting default filter policy
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP

subfuzion

Go has excellent build tools that mitigate the need for using make. For example, go install won't update the target unless it's older than the source files.

However, a Makefile can be convenient for wrapping Go commands with specific build targets that simplify usage on the command line. Since most of the targets are "phony", it's up to you to weigh the pros and cons of having a dependency on make versus using a shell script. For the simplicity of being able to specify targets that can be chained and can take advantage of make's chained targets,

dreikanter

Symmetic encryption

For symmetic encryption, you can use the following:

To encrypt:

openssl aes-256-cbc -salt -a -e -in plaintext.txt -out encrypted.txt

To decrypt: