If there are no PIDs at a certain point, you have at least confirmed that sshd has died for some reason. Exagear is gone and so is Eltechs, suprisingly enough their activation server seems to be still working (2022 edit: I highly doubt its still online.
WRT those PIDs: there should be at least one, and while exactly what it is doesn't matter, it should be reasonably consistent (i.e., not change every 15 minutes). The first line indicates there is a working network connection and the second one indicates sshd is running. Every 15 minutes it will print something like this to /tmp/mystery.log: 03/27/15 10:59 Ping OK. You can now log out and that should stay going.
Print2log "sshd PIDs: "$(ps -o pid= -C sshd)Ĭall this check.sh or whatever you want, chmod 755 check.sh to make it executable, and start it from within an ssh login: setsid. Here's a simple starting point: #!/bin/bash Stuff like this can be really tedious to peg down, since unless you have a keyboard and monitor you can plug in, there's no way, if ssh doesn't work, to check what's gone wrong on the live system.
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