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Troubleshoot Ubuntu system GPG signature validation error without public key

Source: Internet
Author: User
Keywords UBUNTU GPG Signature Verification
Tags .net apt download error export html http import
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See similar: W:GPG Signature validation error: Http://ppa.launchpad.net karmic 920.html ">release: The following signatures cannot be validated because there is no public key: No_pubkey 27f5b2c1b3eac8d9

Workaround:

Download key:
GPG--keyserver subkeys.pgp.net--recv ********
Import Key:
GPG--export--armor ******** | sudo apt-key add-
Note: * Number refers to the eight digits of the key, or all
sudo apt update

GPG--keyserver wwwkeys.pgp.net--recv b3eac8d9
GPG--export--armor b3eac8d9 | sudo apt-key add-
sudo apt update

GPG--keyserver subkeys.pgp.net--recv b3eac8d9
GPG--export--armor b3eac8d9 | sudo apt-key add-
sudo apt update

Fix Ubuntu Update Badsig 40976eaf437d05b5

Repair method:

Code:

sudo apt clean
Cd/var/lib/apt
sudo mv lists Lists.old
sudo mkdir-p lists/partial
CD ~
sudo apt clean
sudo apt update

The above method is not good can try the following this

Code:

sudo aptitude-o acquire::http::no-cache=true-o acquire::brokenproxy=true update

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Related Keywords:
gpg key ubuntu public key encryption and digital signature gpg encrypt file with public key gpg verify signature error signature troubleshoot system ubuntu public key

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