Error message on running apt-get install or apt-get update:
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.debian.org wheezy/updates Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553
W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY C5E6A5ED249AD24C
W: GPG error: http://ftp.fr.debian.org wheezy Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 6FB2A1C265FFB764
W: GPG error: http://ftp.fr.debian.org wheezy-updates Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553
W: Failed to fetch http://security.debian.org/dists/wheezy/updates/Release
Fix:
Add the keys:
# apt-key adv --recv-keys --keyserver keyserver.ubuntu.com C5E6A5ED249AD24C
Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.
He is a full stack developer, whose favorite languages are currently Python and Vue.js. He is also fluent in Javascript, Flutter/Dart, Perl, PHP, SQL, C and bash shell scripting. He loves Linux, and can often be found tinkering with linux kernel code, and source code for GNU applications. He used to be an active developer on XDA forums, and his tinkered ROMS used to be very popular in the early 2000s.
His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.
When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.