Errors

use_warnings

Net::Ping

valid_signature

Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Wed 27 Jun 2018 07:05:52 PM JST
gpg:                using RSA key 2895A881D34270FABFE8F747B4F63339E65D6414
gpg: Can't check signature: No public key