Debian 9 SSH服务启动失败(code=exited, status=255)

1. 卸载

   sudo apt-get remove openssh-server openssh-client --purge && sudo apt-get autoremove && sudo apt-get autoclean && sudo apt-get update

2. 重装

   sudo apt-get install openssh-server openssh-client

参考：dependencies – apt-get dependency issue Open-SSH Client – Ask Ubuntu