Step 1: Import the public key. I downloaded FreeRADIUS source to install on SuSe Linux 10.1. set package-check-signature to nil, e.g. gpg --verified the files. I'm sure there is a simple resolution to this dilemna. M-x package-install RET gnu-elpa-keyring-update RET. gpg --verify callrecording-13.0.9.tgz.gpg gpg: Signature made Fri 15 Jan 2016 09:39:31 AM CST using RSA key ID 69D2EAD9 gpg: requesting key 69D2EAD9 from hkp server keys.pgp.com gpg: keyserver timed out gpg: Can’t check signature: No public key ; reset package-check-signature to the default value allow-unsigned; This worked for me. Before you can do that you need to tell gpg about our public key… A quick and dirty way would be to run both gpg and gpgv.The first run of gpg would ensure the key was fetched from the keyserver, and then gpgv will give you the return code you want.. A more elegant, controlled way (though it would involve more work) would be to use the gpgme library to verify the signature. In the guide to verifying the ISO on the Linux Mint website it does say "Note: Unless you trusted this signature in the past, or a signature which trusted it, GPG should warn you that the signature is not trusted. I hope the guide will be repaired. Last edited by loqs (2018-04-13 17:48:20) Assuming you trust Michal Papis import the mpapis public key (downloading the signatures). We will use the gpg program to check the signatures. During GPG check i get: gpg: Can't check signature: No public key Expected Behavior Proper GPG check Current Behavior During GPG check i get: gpg: Can't check signature: No public key Possible Solution ? As stated in the package the following holds: Signing files with any other key will give a different signature. Following these verification instructions will ensure the downloaded files really came from us. # dpkg-source -x libevent_2.0.12-stable-1.dsc gpgv: Signature made Fri Jun 17 07:12:50 2011 PDT using DSA key ID 7ADF9466 gpgv: Can't check signature: public key not found dpkg-source: warning: failed to verify signature on ./libevent_2.0.12-stable-1.dsc Any idea how to fix this warning? After checking this and doing a bit of searching, it turns out PermitRootLogin no needs to be PermitRootLogin without-password if you want to specifically use just keys for root login. gpg: Can't check signature: public key not found I know I have to import a public key but I don't know where to obtain this file and I've found very little information describing what to do. I'm somewhat new to centos since I'm mainly a debian kind of guy, so I was unaware of /var/log/secure. But instead I just got one of the two keys (second one). Two options come to mind (other than parsing the output). Primary key fingerprint: 4AA4 767B BC9C 4B1D 18AE 28B7 7F2D 434B 9741 E8AC This was using gnupg 2.2.5-2 as provided by arch perhaps the issue is version specific. "gpg: Can't check signature: No public key" Is this normal? M-: (setq package-check-signature nil) RET; download the package gnu-elpa-keyring-update and run the function with the same name, e.g. From the download links, I can download the source "freeradius-server-2.1.1.t ar.gz" and PGP signature file "freeradius-server-2.1.1.t ar.gz.sig".I read some comments from EE experts but I still don't have clear idea on what benefit it needs to verify the source file with the provided sig file. Looking at the log /var/log/secure showed that it was just downright refused. Check server time, its fine. 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