Create a new SSH key

1. Open a terminal on your workstation and use the ssh-keygen command to generate a new key

ssh-keygen -t rsa -f ~/.ssh/[KEY_FILENAME] -C [USERNAME]

1. Restrict access to your private key so that only you can read it and nobody can write to it.

chmod 400 ~/.ssh/[KEY_FILENAME]

1. Generate a new SSH key that uses Ed25519 algorithm

ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C "john@example.com"

1. Adding your key to ssh agent

ssh-add ~/.ssh/id_ed25519

Reference:

• https://cloud.google.com/compute/docs/instances/adding-removing-ssh-keys
• https://medium.com/risan/upgrade-your-ssh-key-to-ed25519-c6e8d60d3c54