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Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

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Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

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#!/bin/sh

# Make sure to:
# 1) Name this file `backup.sh` and place it in /home/ubuntu
# 2) Run sudo apt-get install awscli to install the AWSCLI
# 3) Run aws configure (enter s3-authorized IAM user and specify region)
# 4) Fill in DB host + name
# 5) Create S3 bucket for the backups and fill it in below (set a lifecycle rule to expire files older than X days in the bucket)
# 6) Run chmod +x backup.sh
# 7) Test it out via ./backup.sh

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Run Docker commands without sudo

1. Add the docker group if it doesn't already exist

$ sudo groupadd docker

2. Add the connected user $USER to the docker group

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let arrayToObject = (arr) => {
  return arr.reduce(
		(obj, item) => Object.assign(obj, { ...item }),
		{}
	);
}


let arr = [
  {

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const chalk = require('chalk');

// Declare the debug module
let debug = {};

debug.log = message => console.log(chalk.magenta.bgYellow.underline(message));

debug.info = message => console.log(chalk.blue(message));

debug.warn = message => console.log(chalk.yellow(message));

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const chalk = require('chalk');

// Declare the debug module
let debug = {};

debug.log = message => console.log(chalk.magenta.bgYellow.underline(message));

debug.info = message => console.log(chalk.blue(message));

debug.warn = message => console.log(chalk.yellow(message));

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var path = require('path');

module.exports = (function () {
  return path.dirname(require.main.filename || process.mainModule.filename);
})();

// Example of usage:
var rootPath = require('rootPath'); // In root will be absolute path to your application

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tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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1/ Solution 1:

sudo -u postgres psql

\password postgres