Roberto Salgado rsalgado

psql: FATAL: Peer authentication failed for user “postgres” (or any user)

The connection failed because by default psql connects over UNIX sockets using peer authentication, that requires the current UNIX user to have the same user name as psql. So you will have to create the UNIX user postgres and then login as postgres or use sudo -u postgres psql database-name for accessing the database (and psql should not ask for a password).

If you cannot or do not want to create the UNIX user, like if you just want to connect to your database for ad hoc queries, forcing a socket connection using psql --host=localhost --dbname=database-name --username=postgres (as pointed out by @meyerson answer) will solve your immediate problem.

But if you intend to force password authentication over Unix sockets instead of the peer method, try changing the following pg_hba.conf* line:

from

Python3 Virtualenv Setup

Requirements

Python 3
Pip 3

$ brew install python3

Generate a new Elixir project using mix and add cowboy and plug as dependencies in mix.exs:

  defp deps do
    [
      {:cowboy, "~> 1.0.0"},
      {:plug, "~> 0.8.1"}
    ]
  end

Lambda: standard

# Creating a lambda
l = lambda { |name| "Hi #{name}!" }

# Executing the lambda
l.call("foo") # => Hi foo!

SQL to MongoDB Mapping Chart

SQL to MongoDB Mapping Chart¶

In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB.

Executables¶

The following table presents the MySQL/Oracle executables and the corresponding MongoDB executables.

	#To Decrypt Jenkins Password from credentials.xml
	#<username>jenkins</username>
	#<passphrase>your-sercret-hash-S0SKVKUuFfUfrY3UhhUC3J</passphrase>


	#go to the jenkins url
	http://jenkins-host/script

	#In the console paste the script
	hashed_pw='your-sercret-hash-S0SKVKUuFfUfrY3UhhUC3J'

	/**
	* = Recursive descent parser =
	*
	* MIT Style License
	* By Dmitry Soshnikov <[email protected]>
	*
	* In this short lecture we'll cover the basic (non-predictive, backtracking)
	* recursive descent parsing algorithm.
	*
	* Recursive descent is an LL parser: scan from left to right, doing

	defmodule MyApp do
	use Application

	def start(_type, _args) do
	import Supervisor.Spec, warn: false

	children = [
	Plug.Adapters.Cowboy.child_spec(:http, MyApp.Router, [], [
	dispatch: dispatch
	])

	defmodule MyList do
	# Takes 2 lists like [1,2] and [3,4]
	# and produces a single list like [1,3,2,4]
	def zip_merge([heada \| taila], [headb \| tailb]) do
	[heada] ++ [headb] ++ zip_merge(taila, tailb)
	end

	def zip_merge([heada \| taila], []) do
	[heada] ++ zip_merge(taila, [])
	end

	// this is the background code...

	// listen for our browerAction to be clicked
	chrome.browserAction.onClicked.addListener(function (tab) {
	// for the current tab, inject the "inject.js" file & execute it
	chrome.tabs.executeScript(tab.ib, {
	file: 'inject.js'
	});
	});