Changing an SSH private key passphrase with ssh-keygenEdit

Created 3/26/2011, updated 10/31/2023
$ ssh-keygen -p -f .ssh/id_dsa

Note this works for adding a passphrase to an unencrypted key, and also for removing a passphrase from an encrypted key.

Alternatively, change or remove the passhprase on the default key with:

$ ssh-keygen -p