Simple Usage of ZeroTier One for NAT Traversal on GNU/Linux
Remember to check this option when configuring on the web:

Install ZeroTier Online
curl -s https://install.zerotier.com | sudo bash
Check Installed ZeroTier Version
sudo zerotier-cli status
Join a Network
sudo zerotier-cli join ################(networkid)
View Joined Network Information
sudo zerotier-cli listnetworks
Leave a Joined Network
sudo zerotier-cli leave ################(networkid)
Error Solution: zerotier-cli: missing port and zerotier-one.port not found in /var/lib/zerotier-one
Execute the following command to resolve:
zerotier-one -d