Using Ubuntu 14.04 LTS (64 bit).  $ sudo apt-get update    . . . Fetched 2,079 kB in 1min 1s (33.7 kB/s)                                         Reading package lists... Done   W: GPG error: http://public-repo-1.hortonworks.com HDP InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B9733A7A07513CAD   W: GPG error: http://public-repo-1.hortonworks.com HDP-UTILS InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B9733A7A07513CAD   How can I resolve this problem?
5304
I frequently cross this issue, and always have to google for an answer. Does anyone have a permanent fix for BADSIG errors from apt-get?     W: GPG error:    lucid   Release: The following signatures were   invalid: BADSIG 54422A4B98AB5139   Oracle Corporation (VirtualBox archive   signing key)
9300
On googling this error it seems that a lot of people are having this issue.  apt-get upgrade hangs at 0% [waiting for headers] apt-get install apache2 hangs at 0% [waiting for headers]. Some apt-get commands are working, but only certain packages.  Any ideas? I don't think this is an issue with slow repos because I've had it up for a long while and it hasn't budged from 0%. I have edited sources.list but I removed the lines I added when this issue presented itself and it hasn't made a difference.  Any clues would be really useful.
35536
After installing Ubuntu 13.10 I try to install ubuntu-restricted-extras or any software, it shows me:  E: GPG error: http://archive.canonical.com saucy InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication
83147
I want to upgrade my Ubuntu 13.04 to Ubuntu 13.10. I'm unable to do via GUI.   [ The reason why I'm unable to do so:  Via software updater, I proceed ahead and click upgrade (for upgrading my OS). I authenticate by providing my password. Then it proceeds and downloads upgrade tool. That time only (while downloading the tool) error message comes "system program problem detected". It then doesn't proceed ahead and I click to report the problem ]  So, I tried via command line but here also I couldn't succeed upgrading my OS.  For the same I ran   $ sudo apt-get update   Then I ran  $ sudo apt-get dist-upgrade   And then:  ravbholua@ravbholua-Aspire-5315:~$ sudo do-release-upgrade Checking for a new Ubuntu release Get:1 Upgrade tool signature [198 B]                                                                                                  Get:2 Upgrade tool [1,135 kB]                                                                                                         Fetched 1,135 kB in 6s (32.9 kB/s)                                                                                                    authenticate 'saucy.tar.gz' against 'saucy.tar.gz.gpg'  gpg exited 2 Debug information:    gpg: Signature made Friday 01 November 2013 10:34:27 AM IST using DSA key ID 437D05B5 gpg: Can't check signature: public key not found  Authentication failed Authenticating the upgrade failed. There may be a problem with the network or with the server.  ravbholua@ravbholua-Aspire-5315:~$    Please suggest how to go ahead and upgrade my OS.
84798
Possible Duplicate:    I am using 10.04 LTS - Lucid Lynx. I shutdown the computer while a software update was running. Then after I restarted my computer and while the update manager was running, I got this error:  Could not download all repository indexes The repository may no longer be available or could not be contacted because of network problems. If available an older version of the failed index will be used. Otherwise the repository will be ignored. Check your network connection and ensure the repository address in the preferences is correct. GPG error: http://toolbelt.herokuapp.com ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C927EBE00F1B0520 Failed to fetch  http://ppa.launchpad.net/rabbitvcs/ppa/ubuntu/dists/**DISTRIBUTION**/main/binary-i386/Packages.gz 404  Not Found   I went through the answers to  and I tried this $ sudo launchpad-getkeys  Please wait... launchpad-getkeys is running an update so it can detect the missing GPG keys Trying to import all the missing keys gpg: requesting key 0F1B0520 from hkp server keyserver.ubuntu.com gpgkeys: key C927EBE00F1B0520 not found on keyserver gpg: no valid OpenPGP data found. gpg: Total number processed: 0 launchpad-getkeys has finished importing all missing GPG keys.  Try running sudo apt-get update - you shouldn't see any key  errors anymore  But when I run sudo apt-get update again, it again shows that the key was not found on the keyserver. How to solve this problem?
103387
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&gt; /tmp/keymissing; for key in $(grep "NO_PUBKEY" /tmp/keymissing |sed "s/.*NO_PUBKEY //"); do echo -e "\nProcessing key: $key"; gpg --keyserver subkeys.pgp.net --recv $key &amp;&amp; sudo gpg --export --armor $key | apt-key add -; done   How to fix this problem?
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I've added the ppa here  When I run sudo apt-get update, the software sources aren't found. I figured maybe they hadn't updated their repos to the newest version, so I changed the distro in Software Center to natty. Now when I try to install handbrake-gtk I get the message  handbrake-gtk : Depends: libnotify1 (&gt;= 0.5.0) but it is not installable Depends: libnotify1-gtk2.10 but it is not installable  It looks like the only packages starting with libnotify are libnotify0.4-cil libnotify-bin libnotify-dev libnotify4 libnotify-cil-dev libnotify-doc  The only relevant one seemed like libnotify4, which is already installed. The CLI version installs fine. How can I install Handbrake?
56089
I'm a new user of Ubuntu 13.10.  I recently tried to resolve a Skype installation issue and added some PPA involving binary-1386.  Every time I run sudo apt-get update, I get the following error:  W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/saucy/Release  Unable to find expected entry 'restricted/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/saucy/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file) ... ... E: Some index files failed to download. They have been ignored, or old ones used instead.   I have spent the last two hours trying to resolve this issue, and made changes to my sources.list file by resetting to.the default saucy settings, but these errors are still occuring.  I've also unchecked everything in Software and Updates section, but this still seems to appear.  The error messages seem to be related to the 'binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file) issue as shown above.
48222
So I had intel-Linux-graphics-installer on my computer  but lately when I   sudo apt-get update   I get the following error  Err https://download.01.org trusty/main amd64 Packages                          server certificate verification failed.  CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none   Tried reinstalling intel-linux-graphics-installer but nothing happend. And various solutions found here on askubuntu.com on certificates problems but didnt end up anywhere.  Any ideas on how to get that CRLfile? Also is this problem on my side or on the servers side?
17076
(This question was not resolved. Due to time constraints Computer was restored to factory settings.)  I was attempting to upgrade from 14.04 to 16.04, but apt threw this error:  The required dependency 'apt (&gt;= 1.0.1ubuntu2.13)' is not installed.   What does this mean, and how can I fix it?  When I type in the command apt-cache policy apt  Shageenth@shageenth-Inspiron-3451:~$ apt-cache policy apt apt: Installed: 1.0.1ubuntu2.11 Candidate: 1.0.1ubuntu2.11 Version table: *** 1.0.1ubuntu2.11 0 100 /var/lib/dpkg/status 1.0.1ubuntu2 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64  Packages   The error happens when I run the command:   sudo do-release-upgrade -d   and it produces the following:  Checking for a new Ubuntu release Get:1 Upgrade tool signature [198 B] Get:2 Upgrade tool [1,265 kB] Fetched 1,265 kB in 0s (0 B/s) authenticate 'xenial.tar.gz' against 'xenial.tar.gz.gpg' extracting 'xenial.tar.gz'  Reading cache  Checking package manager Reading package lists... Done Building dependency tree Reading state information... Done Building data structures... Done  Required depends is not installed  The required dependency 'apt (&gt;= 1.0.1ubuntu2.13)' is not installed.
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Friends, I would like to specify my question a little bit, cause a lot of you give me suggestions that are already written in this page  www.ubuntu.com/download/how-to-verify  What confused me is that tip in the 2nd step, where it says :      Tip: On non-Linux systems, you might need to download the GPG tools for this next step. To check if you have the GPG tools installed, run the command gpg --version or gpg2 --version.   Now, it's not written WHERE do I have to write these commands. At the beginning in that page it says "These instructions assume basic knowledge of the command line", so I assumed I needed to open a "Command prompt" program for that, is it right ?  I don't understand why isn't it mentioned in that tip, it is really confusing for a newbie like me. And the results that I get when writing these commands in the "Command prompt" are confusing as well. But knowing that the gnuPG has never ever been installed on my laptop I don't expect too much more.  But still it would be good if it was written in that tip what you should see if it's not installed AND that from Windows OS you have to open a Command prompt program to write these commands in.   Previous question  I want to install Ubuntu on my laptop. I downloaded the iso image and now I want to verify it. I currently have Windows 7 as OS on my computer.   In this page www.ubuntu.com/download/how-to-verify in the 2nd step there is this tip that says:      Tip: On non-Linux systems, you might need to download the GPG tools for this next step. To check if you have the GPG tools installed, run the command gpg --version or gpg2 --version.   Now as I understand I need to write gpg --version when I open the command promt program is that right? I tried and it is unrecognized. But it's okay because I have never ever installed it on my laptop. The thing I worry a bit is am I doing it right? Do I need to use command prompt program for this?
84501
I am running 19.10 on a Lenovo flex 11 and all seems to be working smoothly. I regularly check for updates and often get something new installed apparently. Well, today I checked for updates and get the message "Failed to load repository information". My network connection is good...hello, my question is getting in here...so what is going on? Fetching e-mail works, surfing the web works, streaming works, but am unable to download repository information. What's up? results of update attempt:  tom@tom-Lenovo-FLEX-6-11IGM:~$ sudo apt update [sudo] password for tom:  Ign:1 http://dl.google.com/linux/earth/deb stable InRelease Hit:2 http://us.archive.ubuntu.com/ubuntu eoan InRelease                     Hit:3 http://us.archive.ubuntu.com/ubuntu eoan-updates InRelease             Hit:4 http://us.archive.ubuntu.com/ubuntu eoan-backports InRelease Get:5 http://dl.google.com/linux/earth/deb stable Release [933 B] Get:6 http://dl.google.com/linux/earth/deb stable Release.gpg [819 B] Hit:7 http://security.ubuntu.com/ubuntu eoan-security InRelease Ign:6 http://dl.google.com/linux/earth/deb stable Release.gpg Reading package lists... Done W: GPG error: http://dl.google.com/linux/earth/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 78BD65473CB3BD13 E: The repository 'http://dl.google.com/linux/earth/deb stable Release' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. tom@tom-Lenovo-FLEX-6-11IGM:~$   my ignorance is nearly complete, but it appears to me that something may be lacking in the place where updates live - I am grateful for the assistance I get here.
81530
Whenever I click on software updater it says Failed to download repository information.  It's been saying this for the past few days now and I don't know why, my Internet connection is fine, I am able to manually download software.  Sometimes it crashes when I click okay, then attempts to look for updates again and gives me the same message.  Any ideas?  [EDIT] I just tried an answer posted where I reset where the downloads come from, but I was left with this message:  W:The repository 'http://ppa.launchpad.net/noobslab/noobslab-conky/ubuntu xenial Release' does not have a Release file.,  W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,  W:See apt-secure(8) manpage for repository creation and user configuration details.,  W:https://content.runescape.com/downloads/ubuntu/dists/trusty/InRelease: Signature by key AAC9264309E4D717441DB9527373B12CE03BEB4B uses weak digest algorithm (SHA1),  E:Failed to fetch http://ppa.launchpad.net/noobslab/noobslab-conky/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found,  E:Some index files failed to download. They have been ignored, or old ones used instead.
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There are many  about Unable to locate package.  For example : if user try to install package by using apt-get then the following error shown. (Here package is used only as example for displaying error message):  sudo apt-get install package Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package package   What does this error mean? How do I solve it?    provided General solution to understand and how to solve such type of error (which is helpful for new users that may unaware of repository-apt install mechanism)  Note : For resolving unmet-dependencies, visit: .
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I am getting error while using sudo apt-get upgrade stating:  dpkg: error processing libgfortran3:amd64 (--configure):   package libgfortran3:amd64 is not ready for configuration   cannot configure (current status `half-installed') Errors were encountered while processing:   libgfortran3:amd64 E: Sub-process /usr/bin/dpkg returned an error code (1)   It does not seem to block the installation/upgrade other applications. I believe this problem arose due to direct shutting down of my PC while the application was being upgraded.  How can I fix this?
50553
I use Ubuntu Studio 16.04 LTS, 64 bit, into 3 desktop PC (Intel i5 and i7) and 4 laptops (Intel Pentium). All with 8 GB of RAM.  Since about a week ago, I've been getting the following message each time I try to update/upgrade the system:  https://download.01.org/gfx/ubuntu/16.04/main xenial InRelease" has no Public Key. It isn't safe to use this kind of repository.   I tried to remove that repository (which I don't remember adding) with the terminal command:  sudo add-apt-repository -r &lt;repository to  remove&gt;   But, even though the system seems to perform that action, the repository is used next time I type:  sudo apt-get update   This repository isn't visible in Synaptic Software Manager and/or Ubuntu Software Center.  How can I fix it?
123011
When I run sudo apt-get update on my fully updated Ubuntu 16.04.6 LTS I get the following errors about Google repositories:  $ sudo apt update ... Err:20 http://dl.google.com/linux/earth/deb stable Release.gpg   The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520 Get:21 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Err:13 http://dl.google.com/linux/chrome/deb stable Release.gpg    The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520 ... W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com/linux/earth/deb stable Release: The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520 W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com/linux/chrome/deb stable Release: The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520 W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release.gpg  The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520 W: Failed to fetch http://dl.google.com/linux/earth/deb/dists/stable/Release.gpg  The following signatures were invalid: KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520  KEYEXPIRED 1555048520 W: Some index files failed to download. They have been ignored, or old ones used instead.   The apt-key list returns:  pub   1024D/7FAC5991 2007-03-08 uid                  Google, Inc. Linux Package Signing Key &lt;linux-packages-keymaster@google.com&gt; sub   2048g/C07CB649 2007-03-08  pub   4096R/D38B4796 2016-04-12 uid                  Google Inc. (Linux Packages Signing Authority) &lt;linux-packages-keymaster@google.com&gt; sub   4096R/997C215E 2017-01-24 [expires: 2020-01-24]    Removing Google keys and packages with   sudo apt-key del D38B4796 sudo apt-key del 7FAC5991 sudo apt purge google-chrome-stable  sudo apt purge google-earth-pro-stable sudo apt purge google-earth-stable   and reinstalling packages with   cd ~/Downloads wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb sudo apt-get install --reinstall ./google-chrome-stable_current_amd64.deb  wget https://dl.google.com/dl/earth/client/current/google-earth-pro-stable_current_amd64.deb sudo apt-get install --reinstall ./google-earth-pro-stable_current_amd64.deb   does not help.  Executing command from  :  wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | sudo apt-key add -   does not help.  How should I fix it?  What else I did: 1. sent feedback from Google Chrome with Help → Report an Issue. 2. sent feedback from Google Earth using Help → Send feedback. 3. created thread on