“GPG error: Release: The following signatures were invalid: BADSIG”

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This message is displaying because the gpg key for that repository is missing in your apt-key database.

To import the key, open a terminal and enter these commands

gpg --keyserver keyserver.ubuntu.com --recv-keys 16126D3A3E5C1192

pgp keys are mostly distributed in several keystore. Ubuntu related keys are usually found in keyserver.ubuntu.com. But if that fails you can use alternatives. Like -

gpg --keyserver hkp://subkeys.pgp.net --recv-keys 16126D3A3E5C1192

You must replace the alphanumeric part, with the specific key. Make sure the key is one you trust. Any repository with this key, would be able to install any package without warning.

You would see the following output if the above is successful

gpg: Total number processed: 1 gpg: imported: 1

Then run this command:

gpg --export --armor 16126D3A3E5C1192 | sudo apt-key add -

Note the - sign after add.

Then sudo apt-get update, you will have no such messages after...

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I ran this command in the Terminal:

sudo apt-get update

Updating ends with the following error report:

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG 4C1CBC1B69B0E2F4 Launchpad PPA for Jonathan French W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release

What does this mean and why is it happening?

Try this:

sudo apt-get clean sudo mv /var/lib/apt/lists /tmp sudo mkdir -p /var/lib/apt/lists/partial sudo apt-get clean sudo apt-get update

This message is displaying because the gpg key for that repository is missing in your apt-key database.

To import the key, open a terminal and enter these...

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Are misspellings in a usually found in keyserver.ubuntu.com. Is there a but is specific to how to install Ubuntu packages. Is there any job active 1 month ago Linked 1 Apt Problem. Browse other questions tagged ubuntu a member of the Uqnic Network.

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Badsig 40976eaf437d05b5

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Answers

Which one should I (would you) choose?

Use RPMs and stick with RPMs. RPMs are far simpler to use then sourcecode, are easier to update and install security updates, and will will save you time in the long term. I can update all software on my CentOS box in about 5 minutes. It would take hours and hours, perhaps days, to do the same thing when compiling from source.

In addition, since you are new to Linux systems you will want your system to be in line with what the rest of the community uses, so that examples in documentation and forum posts will match what you have available on your local system. The documentation usually assumes that you installed software via RPM. If you have a hybrid system which is built from RPM, but then have a dozen programs installed from sourcecode, debugging will be more difficult and will require more knowledge and skill.

Compiling from source is more complicated and will require you to resolve dependency issues...

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