0
votes
1answer
292 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 ...
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votes
0answers
336 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 ...
0
votes
2answers
255 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
250 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 ...
0
votes
3answers
131 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
1answer
162 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 ...
1
vote
0answers
197 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: ...
1
vote
2answers
165 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 ...
1
vote
1answer
89 views

14.04 - GPG error, public key not available

apt-get update returns: W: GPG error: http://ppa.launchpad.net trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D46F45428842CE5E i've ...
0
votes
1answer
89 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
1answer
50 views

Why am I getting errors today when updating Oneiric PPAs? [closed]

When I update software from terminal with sudo apt-get update almost always don't shown errors but this time is different. What I think is that most of the ppa pages has been modified. i.e. When the ...
0
votes
1answer
67 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 ...
1
vote
0answers
47 views

Apt-get commands won't work

On my ubuntu 15.04 server the apt-get command won't work. I think it has something to do with perl. Does anyone know how to fix it? I've already tried apt-get -f install, but that outputs the same ...
0
votes
0answers
37 views

Unity Player for Ubuntu 14.04 installation hiccup

I am trying to set up Unity player for mozilla, so I followed the these instructions. How to install unity web player on Ubuntu 14.04? However when I tried "sudo apt-get update" I get... W: GPG ...
0
votes
0answers
35 views

Some index files failed to download. They have been ignored, or old ones used instead

I'm quite new to linux and I've been facing a lot of prob. Every single time I use sudo apt-get update I get the following output: (I apologize for not being able to upload it here directly ...

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