Install ssh-import-id by entering the following commands in the terminal:
sudo apt update sudo apt install ssh-import-id
Description:
securely retrieve an SSH public key and install it locally
This utility will securely contact a public keyserver (Launchpad.net by default, but Github.com is also supported), retrieve one or more user's public keys, and append these to the current user's ~/.ssh/authorized_keys file.
Homepage: http://launchpad.net/ssh-import-id
Version: 5.7-0ubuntu1
Section: misc