-.B import-subkey FILE [KEYID]
-Import an existing ssh RSA key as an authentication subkey for a
-private key in your GnuPG keyring. KEYID is the key ID for the
-primary key for which the subkey with "authentication" capability will
-be imported. If no key ID is specified, but only one key exists in
-the secret keyring, that key will be used. `i' may be used in place
-of `import-subkey'.
-.TP
-.B gen-subkey [KEYID]