Modify the/etc/ssh/sshd_config file, remove the comments of ClientAliveInterval0 and ClientAliveCountMax3, and change the value of 0 corresponding to ClientAliveInterval to 60. ClientAliveInterval specifies the time interval between the server and the client, the default value is 0. clientAliveInterval60 indicates modifying the/etc/ssh/sshd_config file every minute, removing the comments of ClientAliveInterval 0 and ClientAliveCountMax 3, and changing the value of 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.
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