Many times you may observe because of Multiple session on SSH service stop responding and that will lead to a problem and no new session will be established, In such situation you will not be able to connect the server using SSH. To resolve this either reboot the server from console or kill all the Running SSH session by logging into console. to check the session run below Command # /etc/init.d/sshd status or #ps -ef | grep sshd this command will list the number of session running currently. To kill all the SSH running session run the below command. in some situation restarting SSH...

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