How to setup headless Qortal node with minting on Vultr VPS - Ubuntu 18.04

Alternate link for this blog with better formatting:
https://gist.github.com/Traxo7/5016efd0deec1af7ef52efcee27ad74b

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This article goes through the process of setting up a headless Qortal node using Vultr VPS, and setting up a minting account for the node.

Setup VPS

Register Vultr account and create a server

Register an account with Vultr
(referral link, you get $100 credits): https://www.vultr.com/?ref=8976898-8H)

Deploy a new server, under Server Type select Ubuntu 18.04.
Rest of the form should be filled, change what you need and submit the form to finish deployment.
(Wait a while until installation is completed, usually up to few minutes)

Install Qortal Core on the server

• Connect to the server from your local machine:
  local@home:~$ ssh [email protected] (use your VPS ip)

• Download core, install dependencies and core:

root@vultr:~# git clone https://github.com/Qortal/qortal.git
root@vultr:~# sudo apt install maven

root@vultr:~# cd qortal/
root@vultr:~/qortal# echo '{}' > settings.json
root@vultr:~/qortal# mvn clean package

• run the core:
  root@vultr:~/qortal# tmux
  in tmux screen:
  root@vultr:~/qortal# java -jar target/qortal-2.1.0.jar (might be different version)
  Press CTRL + B, then D to exit tmux.
  Node is now running (should be downloading and extracting bootstrap automatically).

Add minting key

Make sure Qortal Core is running.
Navigate to home directory
cd

download the Qort tool script (source https://github.com/Qortal/qortal/blob/master/tools/qort):
root@vultr:~# wget https://raw.githubusercontent.com/Qortal/qortal/master/tools/qort

make the script executable
root@vultr:~# chmod +x qort

Add minting key
root@vultr:~# ./qort admin/mintingaccounts YOUR_MINTING_KEY

(optional) Check for added minting keys:
root@vultr:~# ./qort -p admin/mintingaccounts

More info

If running a VPS with less than 2GB RAM, you might need to allocate some swap space.
https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-18-04

If running a VPS with 2GB RAM or less, your core might run out of RAM ocassionally, so limit the RAM which Java process can use when running the core:

root@vultr:~/qortal# java -Xmx1500M -jar qortal.jar