search for: id_ed25519_somekey

...th to the key. Using this knowledge I just have my script infer the path using sed. This strategy works, but I noticed that when you call ssh (with AddKeysToAgent set to 'yes') vs ssh-add, the prompts are slightly different: $ ssh user at host Enter passphrase for key '/home/user/.ssh/id_ed25519_somekey': $ ssh-add /home/user/.ssh/id_ed25519_somekey Enter passphrase for /home/user/.ssh/id_ed25519_somekey: Notice the single quotes around the path in the prompt when calling ssh. I'm not sure if that's a bug with regard to consistency. I was able to modify the regex to account for this...