转载自：http://blog.csdn.net/quqi99/article/details/51434248
SSH连接总是隔一段时间没有输入时就断开，解决办法如下：
方法一：修改服务端配置
sudo vi /etc/ssh/sshd_config
ClientAliveInterval 60 #服务端主动向客户端请求响应的间隔
ClientAliveCountMax 10 #服务器发出请求后客户端没有响应的次数达到一定值就自动断开
sudo restart ssh
方法二：修改客户端配置
sudo vi /etc/ssh/ssh_config #或~/.ssh/config
TCPKeepAlive=yes
ServerAliveInterval 60 #客户端主动向服务端请求响应的间隔
或
ssh -i <key-file> -o StrictHostKeyChecking=no -o TCPKeepAlive=yes -o ServerAliveInterval=30 ubuntu@<ip>
上面方式任选一种，我选客户端配置方式。
在mac os下ssh登录的时候出现了如下错误：
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@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the RSA key sent by the remote host is SHA256:5vuaB3OnzyT/hXdeckzmIRARZMczEj3fJJXYVV8sg10. Please contact your system administrator. Add correct host key in /Users/liuderu/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /Users/liuderu/.ssh/known_hosts:4 RSA host key for 10.10.10.10 has changed and you have requested strict checking. Host key verification failed. |
解决办法：在命令行执行如下命令
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vi ~/.ssh/known_hosts |
在打开的编辑器中删除相关的信息，按Esc，输入wq保存即可