这是在 Ubuntu 12.04 服务器上。
尝试运行任何apt-get install（尝试安装不相关的任意包）时出现此错误：
dpkg: dependency problems prevent configuration of openssh-server:
openssh-server depends on openssh-client (= 1:5.9p1-5ubuntu1.1); however:
Version of openssh-client on system is 1:5.9p1-5ubuntu1.4.
dpkg: error processing openssh-server (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
dpkg: dependency probms prevent configuration of ssh:
ssh depends on openssh-server; however:
Package openssh-server is not configured yet.
dpkg: error processing ssh (--configure):
dependency …