How to automatically disconnect the server when ssh times out

When you use SSH Secure Shell to connect to centos, if you do not perform any operation in a few minutes, the connection will be disconnected. You must log on again. It is annoying to repeat the same operation every time. This annoying problem can be solved by modifying the two places.

1. echo $ TMOUT
If it is blank, it indicates that it is not set. It is equal to the default value 0. Generally, it should not time out. If it is greater than 0, it can be set to 0 in files such as/etc/profile.
Definition: TMOUT: If set to a value greater than zero, the value is interpreted as the number of seconds to wait for input after issuing the primary prompt. bash terminates after waiting for that number of seconds if input does not arrive

2. Modify the/etc/ssh/sshd_config file, remove the comments of ClientAliveInterval 0 and ClientAliveCountMax 3, and change the 0 corresponding to ClientAliveInterval to 60, clientAliveInterval specifies the time interval for the server to request messages from the client. The default value is 0 and no message is sent. clientAliveInterval 60 indicates that the request is sent once every minute, and then the client responds, so that the persistent connection is maintained. clientAliveCountMax. Use the default value of 3. clientAliveCountMax indicates that after the server sends a request, the client will be automatically disconnected If no response is received by the client. normally, the client does not respond.