I have attempted this again, using the following:

{processId} -f /etc/openvpn/client.ovpn

{processId} -config /etc/openvpn/client.ovpn

Both of those commands show this response:
-ash: {processId}:not found

Please provide the full command that I need to run. What do I need to include regarding the process? Are there additional commands that must be run first?

Note: {processId} stands for the random numerical value assigned to the process, which is what I input in my command.