Generate Public SSH Key From Private SSH Key

Published: 12 January 2024

If you have a private SSH key but need to regenerate the public key again, use ssh-keygen with -y. This option will read a private OpenSSH format file and print an OpenSSH public key to stdout.

ssh-keygen -y -f ~/.ssh/id_ed25519 > ~/.ssh/id_ed25519.pub
Enter passphrase: 

This will save the public key to ~/.ssh/id_ed25519.pub.