I'm attempting to enable authentication through haproxy, but using octoprint is my first time with a raspberry pi, so I'm not sure where the command line is to access files. To be more specific I'm trying to run "sudo nano /etc/haproxy/haproxy.cfg". I have access to the server but do not see anywhere to enter commands unless I overlooked something.
I found this: https://discourse.octoprint.org/t/where-is-haproxy-config-in-0-15/1715/3
however, I still cannot find where to enter the commands.