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Linux Debian apt-get update error public key is not available: NO_PUBKEY <id>
In The Name OF Allah
Al-Salam Alekum

[Image: ?u=http%3A%2F%2F4.bp.blogspot.com%2F-k3p...F1.png&f=1]

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:
WGPG errorhttp://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
WYou may want to run apt-get update to correct these problems 
 In Debian we will fix it this way:
PHP Code:
apt-get install debian-keyring

--keyserver subkeys.pgp.net --recv 40976EAF437D05B5 //Don't forget replace this with your key "40976EAF437D05B5"
gpg --export --armor 40976EAF437D05B5 apt-key add 
Don't forget replace this "40976EAF437D05B5" with the key you had problem in... As you see in the above Box I had probelm with this key:
PHP Code:
NO_PUBKEY 40976EAF437D05B5 
Hope this help ye....

Wa Salam Alekum
* Thankful to Allah *

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