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I went through all the existing posts on this but it didn't work. I tried doing 

sudo dpkg --add-architecture armhf

which didn't do anything. I also tried running a script i found on other questions and getting rid of the ppa but that didn't work either.... How do i fix this :( ? Or How do i get rid of this error?

I get the following error(Sorry i tried to post an image but it wouldn't let me b/c of my low reputation)

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-armhf/Packages  404  Not Found [IP: 2001:67c:1360:8c01::19 80]

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/multiverse/binary-armhf/Packages  404  Not Found [IP: 2001:67c:1360:8c01::19 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.
JayC
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    I would avoid trying to put armhf packages on anything that isn't an armhf operating system... is there a specific reason you're trying ot do this? – Thomas Ward May 30 '15 at 14:50
  • possible duplicate of [How can I fix a 404 Error when using a PPA or updating my package lists?](http://askubuntu.com/questions/65911/how-can-i-fix-a-404-error-when-using-a-ppa-or-updating-my-package-lists) – JoKeR May 30 '15 at 15:01
  • @Thomas W. I actually do not know why it's trying to install armhf. I think it's because currently i'm trying to install stuff to NVIDIA's jetson tk1 via ubuntu – JayC May 30 '15 at 15:29
  • @JoKeR I ran the script banish404 but it got stuck and i had to force quit. – JayC May 30 '15 at 15:30

1 Answers1

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In /etc/apt/sources.list, edit the lines which look like

deb http://archive.ubuntu.com/ubuntu/ trusty-security universe
deb http://archive.ubuntu.com/ubuntu/ trusty-security multiverse

so they look like this

deb [ arch=amd64,i386 ] http://archive.ubuntu.com/ubuntu/ trusty-security universe
deb [ arch=amd64,i386 ] http://archive.ubuntu.com/ubuntu/ trusty-security multiverse

then run sudo apt-get update again. The reason for your issue is that the repository you are trying to update from does not support the armhf architecture. You can test this yourself by navigating to http://archive.ubuntu.com/ubuntu/dists/trusty-security/universe in your web browser. You will see binary-amd64 and binary-i386 directories, but no binary-armhf directory.

nsteele
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