"dabbede@gmail.com" writes: […] > Sure. I receive a bunch of messages of this form: > > Oct 14 10:04:23 localhost vmunix: [ 5869.880044] audit: type=1326 > audit(1665734663.369:6): auid=4294967295 uid=989 gid=983 > ses=4294967295 subj=unconfined pid=599 comm="sshd" > exe="/gnu/store/jgw64z5w2q6b4nph7a74jc97ihfxkfsf-openssh-8.9p1/sbin/sshd" > sig=31 arch=40000003 syscall=414 compat=0 ip=0xb7f94549 code=0x0 > Oct 14 10:04:23 localhost shepherd[1]: 0 connections still in use > after sshd-5 termination. > Oct 14 10:04:23 localhost shepherd[1]: Service sshd-5 (PID 598) exited with 255. > Oct 14 10:04:23 localhost shepherd[1]: Service sshd-5 has been disabled. > Oct 14 10:04:23 localhost shepherd[1]: Transient service sshd-5 > terminated, now unregistered. > Oct 14 10:05:43 localhost shepherd[1]: Service sshd-6 has been started. > Oct 14 10:05:43 localhost vmunix: [ 5950.061859] audit: type=1326 > audit(1665734743.553:7): auid=4294967295 uid=989 gid=983 > ses=4294967295 subj=unconfined pid=601 comm="sshd" > exe="/gnu/store/jgw64z5w2q6b4nph7a74jc97ihfxkfsf-openssh-8.9p1/sbin/sshd" > sig=31 arch=40000003 syscall=414 compat=0 ip=0xb7fba549 code=0x0 > Oct 14 10:05:43 localhost shepherd[1]: 0 connections still in use > after sshd-6 termination. > Oct 14 10:05:43 localhost shepherd[1]: Service sshd-6 (PID 600) exited with 255. > Oct 14 10:05:43 localhost shepherd[1]: Service sshd-6 has been disabled. > Oct 14 10:05:43 localhost shepherd[1]: Transient service sshd-6 > terminated, now unregistered. > > I see "Service sshd-6 (PID 600) exited with 255." but I don't know > what it means nor why. > In order to gain more insight I've tried to connect with verbose > output "ssh -v test@localhost" and this is the output 255 usually means something wrong with a program execution (e.g. missing binary). In the current case it should a Shell program by SSH default. Could you try to specify a non-interactive program manually? E.g.: ssh -vvv 127.0.0.1 -- /run/current-system/profile/bin/id It should output SSH client log and ‘id’ program output. Oleg.