Hello and thank you for filing this bug report. It appears you have a local configuration error, as indicated by sshd:
Error: command ['/usr/sbin/sshd', '-T'] failed with exit code 255: /etc/ssh/sshd_config: line 66: Bad configuration option: X11UseForwarding /etc/ssh/sshd_config: terminating, 1 bad configuration options Per `man sshd_config`, you want either: X11Forwarding or X11UseLocalhost But I don't know which you intended. "X11UseForwarding" is not a valid option, though. ** Changed in: openssh (Ubuntu) Status: New => Invalid -- 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/1694659 Title: package openssh-server 1:7.2p2-4ubuntu2.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 Status in openssh package in Ubuntu: Invalid Bug description: Can't upgrade my ubuntu because of this ProblemType: Package DistroRelease: Ubuntu 16.04 Package: openssh-server 1:7.2p2-4ubuntu2.2 ProcVersionSignature: Ubuntu 4.8.0-52.55~16.04.1-generic 4.8.17 Uname: Linux 4.8.0-52-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.6 Architecture: amd64 Date: Wed May 31 11:55:36 2017 ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationDate: Installed on 2017-02-27 (92 days ago) InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2) RelatedPackageVersions: dpkg 1.18.4ubuntu1.2 apt 1.2.20 SSHDConfig: Error: command ['/usr/sbin/sshd', '-T'] failed with exit code 255: /etc/ssh/sshd_config: line 66: Bad configuration option: X11UseForwarding /etc/ssh/sshd_config: terminating, 1 bad configuration options SourcePackage: openssh Title: package openssh-server 1:7.2p2-4ubuntu2.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1694659/+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