This article explains how to solve this warning message message. To solve this problem, get the key using gpg command and add it to the local apt repository using apt-key add command as shown below:. Please note that you may get the same error message for a different keys. Anytime you get a key missing issue, you should take that new key and add it as shown below using apt-key add.
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All about secure apt
It only takes a minute to sign up. The other answers will work, or not, depending on whether or not the key '8B48AD' is present in the packages they indicate. If you need a key, you have to get that key, and where to find it, it's in a key server very probably any key server will do :. According to There is no public key available for the following key ID , this will fix it:. The error There is no public key available for the following key IDs indicates a serious security issue : an operating-system package cannot be checked for integrity with its public key, because its public key is missing. I faced the same problem in Linux Mint Kernel Version 3. Courtesy this answer. You can also comment-out the eval line for a "dry-run": the scriptlet will then only show you what it intends to do, without actually doing it. I was getting a similar error for a PPA repository on Ubuntu Then the PPA repositries started to update on doing sudo apt-get update.
There are times when running apt-get update in Ubuntu will result in error messages such as the following:. For example:. The apt packaging system has a set of trusted keys that determine whether a package can be authenticated and therefore trusted to be installed on the system.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. I added some extra repositories with the Software Sources program. But when I reload the package database, I get an error like the following:. I know I can fix it using apt-key in a terminal, according to the official Ubuntu documentation. But I would have liked to do it graphically. Is there a way to do this without using a terminal?