In The Name OF Allah
Al-Salam Alekum
Hey guys you may face this problem in any of the moments while using Linux. This Error shown when you are trying to update your system this led to fail in the process of upgrading the system:
PHP Code:
W: GPG error: http://ftp.de.debian.org stable/non-US Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: You may want to run apt-get update to correct these problems
PHP Code:
apt-get install debian-keyring
gpg --keyserver subkeys.pgp.net --recv 40976EAF437D05B5 //Don't forget replace this with your key "40976EAF437D05B5"
gpg --export --armor 40976EAF437D05B5 | apt-key add -
PHP Code:
NO_PUBKEY 40976EAF437D05B5
Wa Salam Alekum
* Thankful to Allah *
Kurdy