It's Time To Upgrade Your SSH keys

From a blog post by Gert van Dijk:

Whether you’re a software developer or a sysadmin, I bet you’re using SSH keys. Pushing your commits to Github or managing your Unix systems, it’s best practice to do this over SSH with public key authentication rather than passwords. However, as time flies, many of you are using older keys and not aware of the need to generate fresh ones to protect your privates much better. In this post I’ll demonstrate how to transition to an Ed25519 key smoothly, why you would want this and show some tips and tricks on the way there.

Well worth reading this and upgrading your own ssh keys.

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