Something similar has happened to me, I'm still trying to recover my EC2 instance ..
In Upstart config file , instead of -- exec /usr/sbin/sshd -D inside scricpt block doing a config test with -t parameter and revert to a backup config like /etc/ssh/sshd_config.bk if config test fails could save someone from trouble.. ++ script if [ "$(/usr/sbin/sshd -t 2>&1)" != "" ]; then exec /usr/sbin/sshd -D -f /etc/ssh/sshd_config.bk else exec /usr/sbin/sshd -D fi end script ++ -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/911753 Title: Wrong directive in config file cause server to crash To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/911753/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs