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From: http://stackoverflow.com/questions/1676632/whats-a-quick-way-to-comment-uncomment-lines-in-vim

For those tasks I use most of the time block selection.

Put your cursor on the first # character, press Ctrl``V (or Ctrl``Q for gVim), and go down until the last commented line and press x, that will delete all the # characters vertically.

For commenting a block of text is almost the same: First, go to the first line you want to comment, press Ctrl``V, and select until the last line. Second, press Shift``I``#``Esc (then give it a second), and it will insert a # character on all selected lines. For the stripped-down version of vim shipped with debian/ubuntu by default, type : s/^/# in the second step instead.

	#!/bin/bash

	LogFile=/var/log/cache_backup.log
	BackupDir=/mnt/disk6/cache_backup

	echo `date` "Starting cache drive backup to " $BackupDir >> $LogFile

	#Stop plugin services located in /etc/rc.d/
	# enter in plugins to stop here, if any
	# /etc/rc.d/rc.plexmediaserver stop >> $LogFile

	var mediaJSON = { "categories" : [ { "name" : "Movies",
	"videos" : [
	{ "description" : "Big Buck Bunny tells the story of a giant rabbit with a heart bigger than himself. When one sunny day three rodents rudely harass him, something snaps... and the rabbit ain't no bunny anymore! In the typical cartoon tradition he prepares the nasty rodents a comical revenge.\n\nLicensed under the Creative Commons Attribution license\nhttp://www.bigbuckbunny.org",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" ],
	"subtitle" : "By Blender Foundation",
	"thumb" : "images/BigBuckBunny.jpg",
	"title" : "Big Buck Bunny"
	},
	{ "description" : "The first Blender Open Movie from 2006",
	"sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4" ],



	{-# language
	BlockArguments
	, CPP
	, LambdaCase
	, MagicHash
	, PatternSynonyms
	, Strict
	, TypeApplications

	# Many systems, such as Arch, MSys2, Cygwin, etc., need to have Bash interpret
	# their startup scripts, set Environment variables, etc. Therefore, setting your
	# default shell to anything other than Bash might not be a good idea. In these
	# cases, the conventional advice is to append 'exec fish' at the end of your
	# .bashrc. However, this approach creates another problem; should you need to
	# drop into Bash to run a bash script, you need to be careful to use
	# 'bash --norc' every time. Otherwise, Fish will start up again when you don't
	# want it to. Obviously, this is cumbersome and inefficient. Thus, instead of
	# doing a naked 'exec fish' at the end of your .bashrc, use the following:

	<html>
	<head>
	<title>Stripe Gradient</title>
	</head>
	<body>
	<canvas id="gradient-canvas" data-js-darken-top data-transition-in>
	<!--
	Remove data-js-darken-top to keep the same brightness in the upper part of the canvas
	-->
	</canvas>

	{-# LANGUAGE GHC2021, LambdaCase, PatternSynonyms, RecordWildCards,
	ViewPatterns, OverloadedStrings, GADTs, NoMonoLocalBinds,
	UnboxedTuples, MagicHash #-}

	{-# OPTIONS_GHC -O2 -fspec-constr-count=100 -fllvm #-}
	-- need at least 8 to completely remove all allocations
	-- (I don't know what change lead to it)

	{-# OPTIONS_GHC -Wall -Wno-gadt-mono-local-binds -Wno-type-defaults #-}

	QEMU - 52:54:00
	VMWare - 00:50:56
	Xen Source - 00:16:3E
	Xen - 00:ca:fe
	Microsoft - 00:15:5D

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Z-Index Example</title>
	<style>
	html, body { background-color: #00787F; }
	.container {
	position: relative;

	#!/usr/bin/env bash

	# Abort sign off on any error
	set -e

	# Start the benchmark timer
	SECONDS=0

	# Repository introspection
	OWNER=$(gh repo view --json owner --jq .owner.login)