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Lightsail ssh not working after Ubuntu Upgrade 16.04 to 18.04
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How to resolve while upgrading Ubuntu 16.04 into 18.04 
Lightsail ssh client not working from browser after upgrade the Ubuntu version 16.04 to 18.04. This is very headache to find and resolve the issues. I am here sharing to help our developers to resolve easily.


1) Open TWO ssh connection terminal or putty. (one could be browser ssh).
2) Do all the upgrade functionality in one terminal.

IMPORTANT: ONCE YOU GET BELOW SCREEN WITHOUT GIVING RESPONSE (Y) GOTO ANOTHER OPENED TERMINAL OF THE INSTANCE.


3) Run below commands
    sudo sed -i 's/^Ciphers .*/Ciphers +aes256-cbc,aes192-cbc,aes128-cbc/' /etc/ssh/sshd_config
    sudo systemctl restart sshd

4) Close both terminals then Restart the instance from lightsail.

I hope this should work. Thanks
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