NorbiPeti

Problem

You have installed GPG, then tried to perform a git commit and suddenly you see this error message after it 😰

error: gpg failed to sign the data
fatal: failed to write commit object

Understand the error (important to solve it later!)

If anyone is interested in setting up their system to automatically (or manually) sign their git commits with their GPG key, here are the steps:

Generate and add your key to GitHub
$ git config --global commit.gpgsign true ([OPTIONAL] every commit will now be signed)
$ git config --global user.signingkey ABCDEF01 (where ABCDEF01 is the fingerprint of the key to use)
$ git config --global alias.logs "log --show-signature" (now available as $ git logs)
$ git config --global alias.cis "commit -S" (optional if global signing is false)
$ echo "Some content" >> example.txt
$ git add example.txt
$ git cis -m "This commit is signed by a GPG key." (regular commit will work if global signing is enabled)

One can use MD5 or plain text diff to see differences in PDF files. If that's not enough, here's how to use diff-pdf which knows how to diff based on appearance or words:

brew install diff-pdf
edit your ~/.gitconfig to add this:

[difftool "diffpdf"]
  cmd = diff-pdf --view \"$LOCAL\" \"$REMOTE\"

	import requests
	import re
	import sys
	import time
	import json
	import sqlite3
	from websocket import create_connection, WebSocket


	colors = [

	# VERY IMPORTANT! After each kernel update or dkms rebuild the modules must be signed again with the script
	# ~/.ssl/sign-all-modules.sh

	# Place all files in ~/.ssl folder
	mkdir ~/.ssl
	cd ~/.ssl

	# Generate custom keys with openssl
	openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -subj "/CN=Owner/"

	function hash(str) {
	var hash = 0, i, chr, len;
	if (str.length === 0) return hash;
	for (i = 0, len = str.length; i < len; i++) {
	chr = str.charCodeAt(i);
	hash = ((hash << 5) - hash) + chr;
	hash \|= 0;
	}
	return hash;
	};

	package com.comphenix.example;

	import java.lang.reflect.Method;
	import java.util.Collection;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	import org.apache.commons.lang.Validate;
	import org.bukkit.event.Event;