[Jack-Devel] jackd start/stop

I could not find a solution online for such a trivial matter, therefore my question here. jackd is not a service as I tried to stop and start it with service jackd stop/start and it reports no such service Therefore it seems the only way to stop jackd is with kill -9 <pid> That would be fine, but there is no such process jackd when i do ps. # ps -A |grep -i jack 2905 ? 00:01:02 jackdbus There is is only jackdbus which must be something else. I can see that ardour/mixbus calls jackd with parameters at startup, but if I manually try to start jackd it says it is already running .... but it has no PID. So is it a runaway process on my system. jack disappears often and I have to reboot to get it back, obviously want to avoid that if I can stop and start it cleanly, or preferably reset it cleanly erasing all lock files if any exists etc.