Did this happen before or after you rebooted into Ubuntu 23.04? If before the reboot, /run/sshd should already have been present on the system, created by the previous version of /lib/systemd/system/ssh.service.
If after the reboot, it should be created by /usr/lib/tmpfiles.d/openssh-server.conf, via /lib/systemd/system/systemd-tmpfiles-setup.service. /lib/systemd/system/systemd-tmpfiles-setup.service is a dependency of sysinit.target, so this directory should be created on boot before the ssh socket connection starts up. So I don't see why this directory would be missing for you. ** Changed in: openssh (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/2023001 Title: sshd not starting because of missing /run/sshd Status in openssh package in Ubuntu: Incomplete Bug description: I recently upgraded from Ubuntu to 22.04 to 23.04 using do-release- upgrade (twice because I upgraded via 22.10). After doing so, sshd stopped working. The output of "journalctl -xeu ssh.service" includes the line: Jun 06 01:51:05 big-bucks sshd[4544]: Missing privilege separation directory: /run/sshd This fixed the problem: sudo mkdir /run/sshd It seems like either the upgrade sequence or the service startup sequence should have done this automatically. Currently running: ssh/lunar 1:9.0p1-1ubuntu8 all There was also a problem reported with /run/sshd on bug #1991283, but I guess the fix for that didn't prevent this. ProblemType: Bug DistroRelease: Ubuntu 23.04 Package: ssh (not installed) Uname: Linux 6.2.6-76060206-generic x86_64 ApportVersion: 2.26.1-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Tue Jun 6 02:37:21 2023 SourcePackage: openssh UpgradeStatus: Upgraded to lunar on 2023-06-04 (1 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2023001/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp