List key IDs trusted by the system to certify user identities. `l'
may be used in place of `list-identity-certifiers'.
.TP
+.B gpg-authentication-cmd
+Execute a gpg command on the gnupg-authentication keyring as the
+monkeysphere user. This takes a single command (multiple gpg
+arguments need to be quoted). Use this command with caution, as
+modifying the gnupg-authentication keyring can affect ssh user
+authentication.
+.TP
.B help
Output a brief usage summary. `h' or `?' may be used in place of
`help'.