HowTo: Fix Ubuntu “Requires Installation of Untrusted Packages” Update Error

One of the first things I did after I got my Lenovo IdeaPad Y560 was to make it dual boot to Windows 7 and Ubuntu. After I have installed Ubuntu, I immediately run the Update Manager to update the system. Btw, I always update the system (either Windows or Ubuntu) before I install any programs or do any customizations. This makes sure that all components are up-to-date and helps make the system run smoother and lessens the chances of errors or conflicts with other components.

Anyways, when I tried to download and install the available updates for Ubuntu, I got this error message:

Requires installation of untrusted packages – “The action would require the installation of packages from not authenticated sources.”

I’ve installed Ubuntu lots of times before and this was the first time that I encountered this issue/error. I Googled the error message and found the very short and very simple solution from the Ubuntu forums. I’m sharing this in case someone might encounter the same problem and get the “requires installation of untrusted packages” error while updating Ubuntu.

Here’s how to do it:
1. On your Ubuntu panel, click on System > Administration > Update Manager.
Ubuntu Update Error

2. Look for Settings at the bottom left corner of the Update Manager window, click on it.
Ubuntu Update Error

3. On the Software Sources window, click on the Ubuntu Software tab.
4. Under Downloadable from the Internet, put a check on Source Code.
Ubuntu Update Error

5. Close the window and the changes will be applied.
6. On Update Manager, click on Install Updates.

As mentioned in one of the comments by Sky WalkeR, this issue can also be fixed by typing in the following command lines in the terminal:

That should do it and you should now be able to download and install the available updates for your system. In my case, the Source Code option was not ticked/checked. After I put a check on it and clicked on Install Updates, the “requires installation of untrusted packages” error went away.

Hope this short and simple tutorial will help you if you encounter the same problem while updating Ubuntu. If you know of a different way to solve this problem when updating Ubuntu, please feel free to share it with us via the comment section. Thank you!

Owner and editor of JaypeeOnline. Self-proclaimed geek. New media writer and consultant. WordPress advocate. Loves blogging, gadgets, video games and sports. You can follow him on Google+, Facebook or Twitter.


  1. amal

    January 23, 2020 at 7:02 AM

    It’s better to click ctrl+alt+t and type the command

  2. آموزش php

    December 31, 2015 at 4:02 PM

    very very good.

  3. Malik Marghoob Khan

    May 15, 2015 at 6:25 PM

    @jaypee Thank you it really worked.

    • JP Habaradas

      May 16, 2015 at 10:08 PM

      You’re welcome! Glad to know that it worked for you.

  4. keny

    October 24, 2012 at 10:51 AM

    Thank you so much. It works…

  5. Sky WalkeR

    May 28, 2012 at 2:02 PM

    I’ve tried the following instead.
    from command-line:

    sudo apt-get update
    sudo apt-get upgrade

    also have worked for me.

    • umpirsky

      September 5, 2012 at 2:35 PM

      @Sky WalkeR Worked, thanks.

    • brian

      March 16, 2016 at 2:27 PM

      thanks for the solution everyone – this was really bugging me as it is somewhat intermittent.
      sudo apt-get update
      sudo apt-get upgrade

      takes care of all of it of course

  6. mnowluck

    April 27, 2012 at 8:57 PM

    The resolution is as simple as typing this line in the terminal

    sudo apt-get update

  7. AyukizZ

    April 19, 2012 at 4:56 AM

    Works as intended ! Thanks !


    March 23, 2012 at 3:03 AM

    I did the same thing Peiter did; I changed from U.S. to main server-worked! Wouldn’t have known to do it if not for this page-thanks!

  9. Abhishke

    March 19, 2012 at 9:02 AM

    still not working

    actually after i shifted it to the main server it is showing no more updates

  10. karmakid64

    March 15, 2012 at 10:21 AM

    i’ve checked the sourcecode box tried main server and every server on the list i also tried checking for best server and i still get this error:

    “Requires installation of untrusted packages
    The action would require the installation of packages from not authenticated sources.”


    libavcodec52 libavutil50 libfaac0 libmjpegtools-1.9 libmp3lame0
    libquicktime1 libswscale0 libvpx0 libx264-112 libx264-118

    please help thanks UBUNTU FOREVER !

  11. Remon

    March 14, 2012 at 12:02 PM

    thanks alot dude

  12. tee

    February 19, 2012 at 3:01 AM

    also look in details tab to see if any other programs are conflicting with the update. I had to uninstall wine in order to stop recieving the error

  13. John

    February 10, 2012 at 6:19 PM

    I had to do like Pieter said and change ‘Download From:’ Mine was set to ‘United States’ I changed it to ‘Main Server’ and all is good thanks

    Pieter Says:
    July 18th, 2011 at 5:23 AM

    neo, I had the same problem. I changed ‘Download from’ from a local / national server to ‘Main server’. After that, I could check the ‘Source code’ checkbox.

  14. GavelMawkish

    January 25, 2012 at 12:47 AM

    I was facing the same problem, updating the system alongside Windows 7..It really helped..Thanks a lot buddy… :)

  15. masha

    December 23, 2011 at 2:41 PM

    thank you so so sooo much! it does work. still have problems with activating wireless driver though, ugh..

  16. AME

    December 20, 2011 at 12:37 PM

    Can’t find the update manager in 11.10 unfortunately, so still stuck.

    • AME

      December 20, 2011 at 12:38 PM

      Found it now, but it won’t let me check the ‘source code’ box

      • Euloiix

        January 4, 2012 at 4:37 AM

        You have to switch “download from:” to either “main server” or “united states” (which is probably the same :)

        After switching, I was able to select it and it worked out for me.
        I hope it helps

        • AlexR

          January 7, 2013 at 1:37 PM

          Switching the source did it. Thank you!

      • Joshhredd

        January 17, 2012 at 11:17 AM

        Me too. I can not check the box.

      • kc

        January 18, 2012 at 10:43 PM

        choose the “main server”, not the ‘country’ server. then, the source code will authenticate and all available options will be seen/available

  17. Terence

    October 31, 2011 at 5:16 AM

    It helps me, thank you very much!

  18. Muraleedharan VN,Perambra

    October 26, 2011 at 1:41 PM

    dear,dearer, dearest friend,

    no words enough 2 thank u 4 the precious help . It works pretty well

  19. masterchris

    October 16, 2011 at 7:44 AM

    just change in software sources where it say download from to
    main server

  20. masterchris

    October 16, 2011 at 7:41 AM

    just change in software sources where it say download from main server

  21. cchannel

    September 15, 2011 at 7:55 AM

    Excellent! You’re D man.

  22. george

    September 12, 2011 at 5:24 AM

    thanks so much … u have saved me a lot.

  23. Brandon

    September 8, 2011 at 3:09 PM

    Thanks a lot! It has bothered me to no ends. Your technique worked beautifully.

  24. skydvr

    September 1, 2011 at 9:30 PM

    is there a way to do this via command line? I run a server and generally ssh into it….

  25. Dave

    August 23, 2011 at 1:43 PM

    I can make the checkbox orange, but it won’t let me ‘check’ the check box. Now what?

    • webtrekr

      September 19, 2011 at 9:21 AM

      thanks a lot dude, it was really helpfull

    • webtrekr

      September 19, 2011 at 9:26 AM

      dave, i had the same problem, but it started updating properly anyways. So i guess jus making d box orange is enough. Try updating once.

  26. Gaurav

    August 5, 2011 at 11:27 AM

    Thanks a lot dude. This solved my problem :)

  27. Hbibie

    July 25, 2011 at 3:51 PM

    thank you dude…

  28. ferrysimple

    July 24, 2011 at 9:32 PM

    thnx bro……god bless u. peace

  29. Kamal

    July 24, 2011 at 4:04 AM

    dude..u made my day

  30. Pieter

    July 18, 2011 at 5:23 AM

    neo, I had the same problem. I changed ‘Download from’ from a local / national server to ‘Main server’. After that, I could check the ‘Source code’ checkbox.

  31. Amar

    July 15, 2011 at 1:25 AM

    Thank you much boss..

  32. mohammad

    June 17, 2011 at 6:11 AM

    Many thanks sir. you solved my big problem

  33. laijin kj

    May 26, 2011 at 1:25 AM

    it really worked successful. thanx a looootttttttt

  34. A

    April 9, 2011 at 3:34 AM

    Thanks :)

  35. daniel odjam

    April 5, 2011 at 8:19 AM

    yes, it has really work for me. you are genius. thank you

  36. Amit Srivastava

    April 2, 2011 at 4:10 AM

    Thanks it working

  37. Everard Onggon

    January 31, 2011 at 11:06 AM

    It works for me… :)

  38. neo

    January 28, 2011 at 4:28 PM

    problem fixed. i used “ubuntu tweak” for this. i also got new repositories added, the real google chrome is now added, not the chromium one. plus skype :)

  39. VigneshChennai

    January 24, 2011 at 10:57 AM

    It worked for me .. Thanks

  40. neo

    January 22, 2011 at 9:08 PM

    im using ubuntu 10.10 now. it didnt work though :( i only get a minus [-] tickbox. cant set it to check. any help? the one bugging my update was the “nautilus”.

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