On Fri, Nov 17, 2023 at 7:11 PM Adam Weremczuk <[email protected]> wrote: > > Yesterday SSH on my desktop PC running Ubuntu 20.04 became unresponsive. > > The machine was responding to ping and "telnet 22" was briefly > connecting before connection closed. > > The graphical login prompt was visible, but when I tried to log in, it > threw me to the text console. No login prompt on any virtual consoles > and Ctrl-Alt-Del did nothing. > > There is no information logged in wtmp, kern.log and dmesg. Nothing > interesting in auth.log > > The last 40 lines from syslog look as below: > > Nov 16 17:04:23 ubu20 systemd[1]: session-5089.scope: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1]: Stopping User Manager for UID 0... > Nov 16 17:04:33 ubu20 systemd[1259208]: Stopped target Main User Target. > Nov 16 17:04:33 ubu20 systemd[1259208]: Stopped target Basic System. > Nov 16 17:04:33 ubu20 systemd[1259208]: Stopped target Paths. > Nov 16 17:04:33 ubu20 systemd[1259208]: ubuntu-report.path: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Stopped Pending report trigger > for Ubuntu Report. > Nov 16 17:04:33 ubu20 systemd[1259208]: Stopped target Sockets. > Nov 16 17:04:33 ubu20 systemd[1259208]: Stopped target Timers. > Nov 16 17:04:33 ubu20 systemd[1259208]: dbus.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed D-Bus User Message Bus > Socket. > Nov 16 17:04:33 ubu20 systemd[1259208]: dirmngr.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed GnuPG network certificate > management daemon. > Nov 16 17:04:33 ubu20 systemd[1259208]: gpg-agent-browser.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed GnuPG cryptographic agent > and passphrase cache (access for web browsers). > Nov 16 17:04:33 ubu20 systemd[1259208]: gpg-agent-extra.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed GnuPG cryptographic agent > and passphrase cache (restricted). > Nov 16 17:04:33 ubu20 systemd[1259208]: gpg-agent-ssh.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed GnuPG cryptographic agent > (ssh-agent emulation). > Nov 16 17:04:33 ubu20 systemd[1259208]: gpg-agent.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed GnuPG cryptographic agent > and passphrase cache. > Nov 16 17:04:33 ubu20 systemd[1259208]: pk-debconf-helper.socket: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed debconf communication socket. > Nov 16 17:04:33 ubu20 systemd[1259208]: snapd.session-agent.socket: > Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Closed REST API socket for snapd > user session agent. > Nov 16 17:04:33 ubu20 systemd[1259208]: Reached target Shutdown. > Nov 16 17:04:33 ubu20 systemd[1259208]: systemd-exit.service: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1259208]: Finished Exit the Session. > Nov 16 17:04:33 ubu20 systemd[1259208]: Reached target Exit the Session. > Nov 16 17:04:33 ubu20 systemd[1]: [email protected]: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1]: Stopped User Manager for UID 0. > Nov 16 17:04:33 ubu20 systemd[1]: Stopping User Runtime Directory > /run/user/0... > Nov 16 17:04:33 ubu20 systemd[2567]: run-user-0.mount: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1294]: run-user-0.mount: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1]: run-user-0.mount: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1]: [email protected]: Succeeded. > Nov 16 17:04:33 ubu20 systemd[1]: Stopped User Runtime Directory > /run/user/0. > Nov 16 17:04:33 ubu20 systemd[1]: Removed slice User Slice of UID 0. > > Does anybody have an idea what could have happened?
Whenever I see Snap, I get suspicious. You should probably ask on the ubuntu-users list. The list has a person that answers Snap questions. <[email protected]>. You should also show the SSH connection log for the client and server. I think that's 'ssh -vvv' for the client, and 'journalctl -u ssh' for the server. Jeff
