How to fix OpenVPN 'failed to find UID for user openvpn'
Problem:
In your OpenVPN server logs you see this error message
failed to find UID for user openvpn
followed by a server restart (Exiting due to fatal error).
Solution
Run this command to add the openvpn user and add that user to the openvpn group:
sudo useradd openvpn -g openvpn
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