It looks like you upgraded from Ubuntu 16.04 to Ubuntu 18.04. >From the log file:
Unpacking openssh-server (1:7.6p1-4) over (1:7.2p2-4ubuntu2.4) ... Then the upgrade asked you what to do with the modified conffile, again, from the log: Configuring openssh-server sshd_config: A new version (/tmp/filerMG8sJ) of configuration file /etc/ssh/sshd_config is available, but the version installed currently has been locally modified. What do you want to do about modified configuration file sshd_config? install the package maintainer's version keep the local version currently installed show the differences between the versions show a side-by-side difference between the versions start a new shell to examine the situation <snip> # nano /tmp/filerMG8sJ <snip> Replacing config file /etc/ssh/sshd_config with new version At which point you edited the file and instructed the upgrade process to use the new package version. I'm not quite sure what you expect this bug to resolve, the package seems to be acting as it should. -- 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/1802090 Title: update overwrites sshd_config Status in openssh package in Ubuntu: Incomplete Bug description: The latest update for Bionic (18.04.1) either overwrote or modified my /etc/ssh/sshd_config with the result that I could no longer access my machine using ssh. A specific Port [x] line was removed and replaced by: #Port 22 This was the only change. It happened as part of an automated process this morning - presumably a security update. Was this behaviour intended?! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1802090/+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