ssh连接报Connection closed by foreign host.

今天连接linux时居然连不上，报错信息是：

 Connecting to 192.168.16.133:22...
 Connection established.
 To escape to local shell, press 'Ctrl+Alt+]'.

 Connection closed by foreign host.

 Disconnected from remote host(hadoop3) at 10:56:11.

 Type `help' to learn how to use Xshell prompt.

查了一下终于找到了解决办法，只需要一些命令就可以了：

 cd /etc/ssh
 sudo chmod 644 ./*
 sudo chmod 600 ssh_host_dsa_key
 sudo chmod 600 ssh_host_rsa_key
 sudo chmod 755 .
 /etc/init.d/sshd restart

完成后在重新连接就行了。

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