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Version: 2023.3

Cannot Connect via SSH to Ubuntu 22.04 Machines With Private Key

Description​

Connecting to an Ubuntu 22.04 VM with a private key using the SSH direct access link may fail.

Solution​

To resolve this issue:

  1. Login to Ubuntu 22.04 machine.

  2. Edit /etc/ssh/sshd_config.

  3. Add the following line to the end of the config file:

    PubkeyAcceptedKeyTypes +ssh-rsa

  4. Restart ssh server:

    systemctl restart ssh

Or run this command:

sudo echo -e "PubkeyAcceptedKeyTypes +ssh-rsa\nHostKeyAlgorithms +ssh-rsa" >> /etc/ssh/sshd_config&&systemctl restart ssh

To deploy an Ubuntu-22.04 AWS EC2 App:

  1. Create the script with the below content and place it in an S3 bucket or make it accessible from the deployed App's VM.

    #!/bin/bash

    sudo echo -e "PubkeyAcceptedKeyTypes +ssh-rsa\nHostKeyAlgorithms +ssh-rsa" >> /etc/ssh/sshd_config&&systemctl restart ssh

  2. In the App's Deployment Paths page, specify a link to the script in the USER DATA URL attribute.