tor-print-ed-signing-cert <path to ed25519_signing_cert file>
tor-print-ed-signing-cert is utility program for Tor relay operators to check expiration date of ed25519 signing certificate.
Expiration date is printed in three formats:
tor(1)
https://spec.torproject.org/cert-spec
Roger Dingledine <arma@mit.edu>, Nick Mathewson <nickm@alum.mit.edu>.
Tor Project, Inc.