# Linux Ubuntu 18.04 LTS Server Setup

### On remote machine

#### As `root`

1. Change root password
    - `$ passwd`
1. Create user & their home directory
    - `$ useradd -m <username>`
1. Set user's password
    - `$ passwd <username>`
1. Make user a sudoer
    - `$ usermod -aG sudo <username>`
1. Set user's shell as bash
    - `$ chsh -s /bin/bash <username>`
1. Disconnect SSH session

#### As `<username>`

1. Install essentials
    - Update & upgrade
        - `$ sudo apt update && sudo apt upgrade`
    - Install `nano`, `curl` and `git`
        - `$ sudo apt install nano curl git`
1. Enable passwordless sudo for user
    - `$ sudo nano /etc/sudoers`
    - Add: `<username> ALL=(ALL) NOPASSWD: ALL` (after `includedir /etc/sudoers.d`)

### On local machine

1. Copy SSH public key to remote machine's authorized keys
    - `$ ssh-copy-id -i <public-key-path> <username>@<remote-machine-ip-address>`

### On remote machine

#### As `<username>`

1. Edit SSH daemon configuration
    - `$ sudo nano /etc/ssh/sshd_config`
    - Disable root access
         - Edit: `PermitRootLogin no`
    - Disable password authentication
         - Edit: `PasswordAuthentication no`
    - Restart ssh service: `$ sudo /etc/init.d/ssh restart`
1. Configure locale
    - https://help.ubuntu.com/community/Locale 
    - https://askubuntu.com/questions/89976/how-do-i-change-the-default-locale-in-ubuntu-server
1. Install Docker
    - https://docs.docker.com/engine/install/ubuntu
1. Install Docker Compose 
    - https://docs.docker.com/compose/install/#install-compose-on-linux-systems