This should be a bunch of commands, handy just for my use.

Create User

adduser user
# add to sudo group
usermod -aG sudo user

# from your station
ssh-copy-id user@ip

Or

# manually
# from your station
cat ~/.ssh/id_rsa.pub
# copy it
# to your remote (user)
mkdir ~/.ssh
chmod 500 ~/.ssh
vim ~/.ssh/authorized_keys
# paste it, save, quit
chmod 600 ~/.ssh/authorized_keys

Swapfile

(thread: https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-16-04)

Allocate

sudo fallocate -l 1G /swapfile

Enable

sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
# see the result
sudo swapon --show

Make Swap Permanent

# back up old setting
sudo cp /etc/fstab /etc/fstab.bak
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab

Docker

(thread: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04)

sudo apt-get update
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
sudo apt-add-repository 'deb https://apt.dockerproject.org/repo ubuntu-xenial main'
sudo apt-get update
apt-cache policy docker-engine

Should see:

docker-engine:
  Installed: (none)
  Candidate: 1.11.1-0~xenial
categories: dev
  Version table:
     1.11.1-0~xenial 500
        500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages
     1.11.0-0~xenial 500
        500 https://apt.dockerproject.org/repo ubuntu-xenial/main amd64 Packages

sudo apt-get install -y docker-engine
sudo systemctl status docker

Should see:

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2016-05-01 06:53:52 CDT; 1 weeks 3 days ago
     Docs: https://docs.docker.com
 Main PID: 749 (docker)

Make it run without sudo:

sudo usermod -aG docker $(whoami)
# relogin

docker info

Docker Compose

(thread: https://docs.docker.com/compose/install/)

You might be tempted to install it from apt-get but you will get an old version.

sudo curl -L "https://github.com/docker/compose/releases/download/1.10.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

docker-compose --help