Posăceanu Marian marianposaceanu

Run sudo commands without entering a password

Simple way to run stuff like sudo shutdown without entering a password.

Tip: do not use this in production, I use it to shutdown my VMs when I'm done working

run: sudo EDITOR=vim visudo
add a new group, let's say named noners : %noners ALL=(ALL) ALL
run: sudo vim /etc/sudoers.d/g_noners
let's say the user you want to run sudo without password is marian then just add:

Faster specs

Add to Gemfile into test and development groups:

gem 'perftools.rb', require: 'perftools'

From the command line:

Linux fun-o-matic

How to have some fun using the terminal.

Install cowsay [0] via : sudo apt-get install cowsay
Install fortune [1] via : sudo apt-get install fortune
Make sure you have Ruby installed via : ruby -v
Install the lolcat [2] via : gem gem install lolcat
Profit!

Basic git tips

Issue with missing tracked files

git update-index --assume-unchanged my-tracked-file-that-is-awol
git status -u --ignored
git update-index --no-assume-unchanged my-tracked-file-that-is-awol

VIM Tips

Record a sequence

Use q + [lowercase letter to name the macro] then do stuff and when done q and @a or 22@a to repeat.

Advanced search and replace

s:url("../images/\(.*\)");:url("<%= asset_path '\1' %>");:gi

Functional Ruby

Basic Rails security tips

Secret tokens in version control

# in config/initializers/secret_token.rb

MySite::Application.config.secret_token = ENV['SECRET_TOKEN']

	data_sample = [
	name: "Mrianescu"
	coords: [0, 0]
	,
	name: "Marianescu"
	coords: [0, 0]
	,
	name: "Marian"
	coords: [0, 0]
	,

	module KawaiiPhrase
	# Makes awesome random phrases such as "Enjoyable Green Turtle"

	ADJ_1 = [
	'epic',
	'tasty',
	'shiny',
	'mega',
	'ultra',
	'hyper',

	# Rails 4

	class AddHstoreIndexes < ActiveRecord::Migration
	def change
	add_index "nodes", "properties", using: :gin
	end
	end

	# Rails 3.x