Replace the public key in ~/.ssh/authorized_keys on your existing instance so the attacker can no longer unlock it with their private key. Here’s a summary of how to replace the keys mentioned ...

I would like to turn off password authentication for SSH to my server, using keys instead. I don't see an option in Filezilla to use a public key though: is this not a feature of the SFTP spec ...

The Termius client allows you to create SSH connections with ease and even use SSH key authentication, commands and scripts when you connect. Find out how it all works.

AWS CLI installed and configured with a named profile that provides access into the AWS account; While Codespaces and other remote dev solutions also leverage SSH to work on remote machines in VS Code ...

SSH holds fingerprints of your remote machines in the known_hosts file. Sometimes you might need to remove or update one of those entries. Jack Wallen shows you how.