修改sshd_config解决 xshell 链接 linux 错误 connection closed by foreign host

用xshell连接服务器总是报错 connection closed by foreign host，害的我一个程序每次都跑到一半

解决方案是：    

sudo vim /etc/ssh/sshd_config

添加两行：

ClientAliveInterval 60
ClientAliveCountMax 3

sudo /etc/init.d/ssh restart