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I'm using AWS LightAail on Ubuntu.

Initially Web based Terminal was working fine, but when I did

$ sudo apt-get update
$ sudo apt-get upgrade

I got an error

Log in failed. If this instance has just started up, try again in a minute or two.
CLIENT_UNAUTHORIZED [769]
Yevgeniy Afanasyev
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1 Answers1

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0 ) SSH into your instance using a terminal app like in example below, but only provide a real filename of your ssh key and your real ip

$ ssh -i ".ssh/LightsailDefaultKey-.pem" ubuntu@000.000.000.000

1 ) add following 2 lines to /etc/ssh/sshd_config

TrustedUserCAKeys /etc/ssh/lightsail_instance_ca.pub
CASignatureAlgorithms +ssh-rsa

2 ) Restart

sudo /etc/init.d/ssh restart
Yevgeniy Afanasyev
  • 235
  • 3
  • 9