Git and SSH, which key is used?

Question

Say your .ssh directory contains 30 keys (15 private and 15 public).

Where in Git can one check which one is used to connect to a given remote repository?

Answer 1

Unless it is specified on the .ssh/config it will use the default private key file.

The default file is ~/.ssh/id_rsa or ~/.ssh/id_dsa or ~/.ssh/identity depending on the protocol version.