Bob Bernstein <b...@fanatick.org> writes:
> My initial question was _meant_ to be, simply: can this (ps ax|grep
> ssh) be done, or approximated to, using sysctl?
No, systemd is not supposed to replace standard system utilities. (Also
sysctl is a completely unrelated tool to configure kernel parameters;
the systemd utility is systemctl.)
However if you configure your ssh tunnel as a service that systemd
manages, then you can query systemd about its state via systemctl or
directly via systemd's DBus interface:
Is the service running?
systemctl is-active my-tunnel
What is the services main process' PID?
systemctl -pMainPID show my-tunnel
Note that there is also a per-user instance of systemd to allow regular
users to use systemd to manage their own services if they choose to do
so. Not everything has to be a system service.
Ansgar
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