103
votes
3answers
102k 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 ...
99
votes
12answers
193k views

How to fix missing GPG keys?

I have just installed Ubuntu 12.04 and I added some repo, and when I did apt-get update, I got missing gpg key. Following command seems to doesn't work for me: apt-get update 2> /tmp/keymissing; ...
73
votes
2answers
63k views

GPG error: The following signatures couldn't be verified because the public key is not available [duplicate]

Possible Duplicate: How do I fix the GPG error “NO_PUBKEY”? after sudo apt-get update I get this error: W: GPG error: http://archive.hivemind.me all Release: The following signatures couldn't ...
68
votes
4answers
116k views

Requires installation of untrusted packages?

I tried installing VLC Player yesterday, and I got the Requires installation of untrusted packages error. I searched for hours for a solution to this problem, and finally came upon a suggestion that ...
66
votes
9answers
54k views

What's the difference between Wubi and a regular “alongside Windows” installation?

At this time, Wubi does not work with Windows 8 default boot-loader. Thus at this point Wubi would not work on a new Windows 8 machine. Citation fom WubiGuide Question Recently I've learned of ...
52
votes
2answers
24k views

There is no public key available for the following key IDs 1397BC53640DB551 [duplicate]

When I run the command: sudo apt-get update I got this following warning: There is no public key available for the following key IDs: 1397BC53640DB551 This is the only warning I got and I do not ...
31
votes
1answer
47k views

W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available:

I get the following error when i do sudo apt-get update W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: ...
27
votes
1answer
50k views

How to fix GPG in updater [duplicate]

I have asked this question before, but it was closed as a "duplicate." I can assure you that my scenario is original, as it does not refer to third party PPA's. I am having GPG problems with system ...
17
votes
1answer
45k 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: http://extras....
17
votes
1answer
11k 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 ...
9
votes
1answer
808 views

“The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192” [duplicate]

$ sudo 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://extras.ubuntu.com maverick ...
9
votes
2answers
9k 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 ...
8
votes
1answer
14k views

Apt-get update error: http://extras.ubuntu.com Public key unavailable [duplicate]

GPG error: http://extras.ubuntu.com natty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192 I think I selected to ...
7
votes
1answer
2k views

What are the GPG signatures

Looking at questions like THIS, THIS and THIS I ask for public knowledge the following questions: What are the GPG Signatures for? What additional level of security do the Signatures add or provide ...
7
votes
1answer
1k views

How to make a sound effect play whenever I click?

I know that sounds like a weird idea, but I kinda want to experiment with this. Over the past few months, I've kinda turned Ubuntu into my own little Frankenstein's monster, but whatever you tell me ...

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