Hi Huy, The bug report appears to indicate some sort of syntax error in your /etc/ssh/sshd_config file. What's on line 13 of that file?
SSHDConfig: Error: command ['/usr/sbin/sshd', '-T'] failed with exit code 255: /etc/ssh/sshd_config: line 13: Bad configuration option: Include /etc/ssh/sshd_config: terminating, 1 bad configuration options If you're uncertain, then can you please attach your /etc/ssh/sshd_config for us to review? If that file contains any information that is security sensitive or personally identifying please change this bug report from "Public" to "Private". Thanks ahead of time. ** Summary changed: - package openssh-server 1:7.6p1-4ubuntu0.3 failed to install/upgrade: installed openssh-server package post-installation script subprocess returned error exit status 1 + failed to install/upgrade: sshd_config: line 13: Bad configuration option ** Changed in: openssh (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905088 Title: failed to install/upgrade: sshd_config: line 13: Bad configuration option To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1905088/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs