On Thu, Dec 14, 2023 at 04:44:07AM +0000, Kerin Millar wrote: > On Wed, 13 Dec 2023 23:16:11 -0500 > Zachary Santer <zsan...@gmail.com> wrote: > > > On Wed, Dec 13, 2023 at 11:06 PM Greg Wooledge <g...@wooledge.org> wrote: > > > Is that on a system that lacks a process manager? Something like > > > "systemctl reload ssh" or "service ssh reload" would be preferred from > > > a system admin POV, on systems that have process managers. > > I am not super knowledgeable in this kind of stuff, but would that not > > cause you to lose your SSH connection? > > It would not. Nor would even a restart, owing to the way privilege separation > is implemented in sshd(8).
To expand on this: in most process managers used on Linux systems, the "reload" action sends a SIGHUP or equivalent, if the service supports it. The "restart" action stops and then starts the service. sshd is a special case, with each active connection being managed by a child of the main daemon. Stopping and restarting the main daemon does not cause the existing children to be terminated. This was true even before privilege separation was added.
