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sudo apt-get update gives me the following error:

 W: Failed to fetch http://ppa.launchpad.net/scitools/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found

    W: Failed to fetch http://ppa.launchpad.net/scitools/ppa/ubuntu/dists/trusty/main/binary-i386/Packages  404  Not Found

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

I have removed the scitool using Synaptic package manager, but it still gives me this error. How can I remove scitool from the apt-get update?

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  • Did you remove the PPA you added for it? Open Software and Updates, go to Other Software and remove the scitools PPA. Dec 16, 2014 at 10:04

2 Answers 2

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Although you have removed the scitools package, you haven't removed the PPA.

To remove the scitools PPA -

sudo add-apt-repository --remove ppa:scitools/ppa

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Else you can also use Y PPA Manager to off that PPA

Open your terminal and type/paste as

sudo add-apt-repository ppa:webupd8team/y-ppa-manager
sudo apt-get update
sudo apt-get install y-ppa-manager

Then open that tool and you will see all your PPA's.

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