Edwin Walela EdwinWalela

UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

Synopsis

This is a simple package to generate (pseudo) random strings of specified length separated into "blocks" of specified blockLengths by specified separator characters. This makes this package suitable for generating license or product or serial keys.

The similar looking characters (and numbers) I, 1, 0 and O are always left out of the generated strings to avoid confusion.

Note that the generated keys are just random strings and there's no provision to check their validity cryptographically.

Installation

From npm registry:

	package ec

	import (
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/md5"
	"crypto/rand"
	"crypto/x509"
	"encoding/pem"
	"errors"

	version: "3"
	services:

	postgres-db:
	image: postgres
	restart: always
	ports:
	- 5432:5432
	environment:
	POSTGRES_PASSWORD: postgres