Linked Questions

0
votes
1answer
26 views

Remove Webcontent Control

I installed this program to filter the content. It's not quite user friendly and I'd like to remove it completely. I installed and remove through software manager on Ubuntu 12.04. I'm getting red ...
5
votes
2answers
3k views

GPG error, signatures public key not available TRIED A LOT

apt-get update returns : W: GPG error: http://pl.archive.ubuntu.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 ...
0
votes
1answer
14 views

Cannot find the package to unsinstall it

In a Lubuntu OS someone installed the geosuite now i need to uninstall it becuase when i try to update: sudo apt-get update i get this error: W: GPG error: http://apt.boundlessgeo.com precise ...
5
votes
1answer
916 views

Error authenticating some packages while upgrade

When I try to upgrade my ubuntu 13.04 to 13.10, it gives the following error: It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again ...
79
votes
3answers
73k views

How do I deal with “unauthenticated sources” errors in the Software Center?

Any install that I'm trying through the Software Center is telling me: Requires installation of untrusted packages: The action would require the installation of packages from not authenticated ...
0
votes
1answer
431 views

Can't get anything to install, dependency errors

I'm extremely new to Linux/command line stuff, so please forgive my ignorance. Every time I try to install anything using sudo apt-get install ... I get dependency errors. I'm trying to get OpenSSH ...
0
votes
0answers
13 views

I cant Update my system via terminal [duplicate]

I cant Update my system via terminal, I receive his message: Reading package lists... Error! W: GPG error: http://ppa.launchpad.net trusty Release: The following signatures couldn't be verified ...
0
votes
2answers
1k views

Signatures not verified [duplicate]

These are the signature errors that persist after I tried several fixes mentioned on the Internet W: GPG error: http://deb.opera.com stable InRelease: The following signatures couldn't be verified ...
8
votes
1answer
16k views

GPG ERROR NO_PUBKEY : WARNING: The following packages cannot be authenticated! [closed]

I have just stared to receive some strange errors regarding GPG keys. Namely I have just added ppa:ubuntu-toolchain-r/test and wanted to update and after that I got this: W: GPG error: ...
0
votes
1answer
66 views

What is GPG error?

When my update is complete I am getting an GPG error but I don't know what is GPG.Can someone explain me what is this error and why it has occurred? I know how to fix it but I want to know what is ...
1
vote
2answers
82 views

can't update recommended Updates

I can't update the system. The recommended Updates pops up with some updates but when I hit install it says"Requires installation of untrusted packages"(screen shot below ) and when I hit O.K it ...
0
votes
1answer
46 views

Error message W: GPG error [duplicate]

After updating my system as usual from the terminal it goes on fetching updates but at last it shows the following messages. What does it mean and how do I fix the red icon. Actually to fix the red ...
0
votes
0answers
11 views

I keep getting the GPG error, I've tried almost all the solutions but none are working in my case [duplicate]

W: GPG error: http://ubuntu.ntc.net.np utopic Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32 W: ...

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