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how do i find out what's using (or claiming to be using) a particular port on the NAS.
i powered off the NAS to phyiscally move it, powered it back on.
everything came back up nicely apart from 1 docker instance, apparently because the port that it used for months is now being used by something else.
port 5900
i've checked all the other docker instances and nothing there is using 5900, so i'm at a loss as to what the NAS things is using 5900 that it can't start the docker.
i powered off the NAS to phyiscally move it, powered it back on.
everything came back up nicely apart from 1 docker instance, apparently because the port that it used for months is now being used by something else.
port 5900
i've checked all the other docker instances and nothing there is using 5900, so i'm at a loss as to what the NAS things is using 5900 that it can't start the docker.