0
votes
4answers
9k views

Update Manager Not working Fail to Download Repository Information

When I try to update, I get this error: Failed to Download your repository information Check your internet connection W:GPG error: http ://ppa.launchpad.net oneiric Release: The following ...
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 ...
0
votes
1answer
1k views

How to reinstall apps?

I am having trouble re-installing Create Launcher. I downloaded it two days ago but my Ubuntu was acting weird. Because I am new to Linux/Ubuntu, I un-installed it and re-installed it. I am trying to ...
0
votes
1answer
795 views

W: GPG error and WARNING: The following packages cannot be authenticated!

I am getting following output of sudo apt-get update and sudo apt-get upgrade command. user@user-VPCCB45FN:~$ sudo apt-get update ...... ...... Ign http://in.archive.ubuntu.com trusty-backports/main ...
3
votes
1answer
485 views

/var/cache/apt-show-versions/files: No such file or directory

When I run sudo apt-get update this is the result: can't create /var/cache/apt-show-versions/files: No such file or directory at /usr/bin/apt-show-versions line 196. E: Problem executing scripts APT::...
0
votes
2answers
604 views

I am installing jenkins server but its giving W: GPG error:

Hello all i am installing Jenkins server but i am facing below issue. W: GPG error: http://pkg.jenkins-ci.org binary/ Release: The following signatures couldn't be verified because the public key is ...
1
vote
1answer
572 views

Too many no_pubkey errors . How to fix?

After some updates few months ago i have these outputs: W: Erro GPG: http://sft.if.usp.br trusty Release: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar ...
0
votes
1answer
327 views

How can I get rid of this NO_PUBKEY errors?

sudo apt-get update is giving me this error at the end. I'm using "Y PPA Manager" and it seems that now all PPA's are O.K., but the problem (I think) is with the official Ubuntu repos: W: GPG error: ...
1
vote
1answer
406 views

Cannot remove codeblocks using apt-get - Ubuntu 14.04

Whenever I try to run sudo apt-get remove codeblocks I am met with this message: The following packages have unmet dependencies: codeblocks-contrib : Depends: libgamin0 but it is not going to be ...
0
votes
3answers
233 views

what causes this error by `apt-get update`

What causes this error when sudo apt-get update is issued? W: GPG error: http://download.virtualbox.org trusty InRelease: The following signatures couldn't be verified because the public key is not ...
0
votes
0answers
398 views

How to solve the problems in “sudo apt-get update” [duplicate]

Here is my /etc/apt/source.list file. I get many problems in the output of sudo apt-get update: $ sudo apt-get update [sudo] password for tim: Err http://cran.cnr.Berkeley.edu precise/ Release.gpg ...
1
vote
1answer
268 views

Updage Manager considers generic packages as untrusted packages

Update Manager refuses to install updates because it would require installing untrusted packages. However, if I look at the list of so-called untrusted packages, those seem like they should be ...
1
vote
0answers
251 views

The following signatures couldn't be verified because the public key is not available: NO_PUBKEY

When I look for my error key number 0429ACCAF7AA50B3, it is not in the database, thus I cannot receive or generate anything even none of this did not work: http://opensourceforgeeks.blogspot.cz/2013/...
0
votes
1answer
177 views

W: GPG error: message in my terminal

I get this msg in my terminal W: GPG error: https://download.01.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A902DDA375E52366 ...

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