sudo su -
This command line is used to gain root access for the user.
iptables -I INPUT -p tcp --dport 34210 -j ACCEPT
This command line is used to open the 34210 port on the firewall for Runcloud installation.
Remember to manually open port for 80, 443 and 34210 in Virtual Cloud Networking
Never install more than 1 WordPress site on the server, otherwise the database will crashed. The websites on the server will all be destroyed.