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I am trying to download ros package ros-kinetic-desktop using apt-get. I have set the sources.list and the authentication key as well. However, I am encountering an error that says:

Err:1 http://packages.ros.org/ros/ubuntu xenial/main arm64 ros-kinetic-desktop arm64 1.3.0-0xenial-20170303-020026-0800 404 Not Found [IP: 64.50.236.52 80]
W: Can't drop previleges for downloading as file 'home/sam/ros-kinetic-desktop_1.3.0-0xenial-20170303-020026-0800_arm64.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run(13: Permission)
E: Failed to fetch http://packages.ros.org/ros/ubuntu/pool/main/r/ros-kinetic-desktop/ros-kinetic-desktop_1.3.0-0xenial-20170303-020026-0800_arm64.deb 404 Not Found [IP: 64.50.236.52 80]

PS:sudo apt-get download ros-kinetic-desktop is the exact command I'm using.

Can someone please help me to resolve this. Thanks in advance.

EDIT: I am not supposed to use sudo apt-get update to update my entire cache ( especially the system packages) because the updated packages will crash my proprietary drivers. So, in order to just update the repositories I require, I manually added the ros repository to software and updates applet instead of using apt-get update. This way I am able to directly install the ros packages using install but unable to download them and manually install later.

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  • Is their a difference between the package you want an ros-desktop package? – Mark Kirby Mar 23 '17 at 11:09
  • Is download a package name? – George Udosen Mar 23 '17 at 11:11
  • @MarkKirby the package I am downloading is "ros-kinetic-desktop" – samhitha Mar 23 '17 at 11:22
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    @George download is the command that goes with apt-get, just like install but only downloads the package to a certain location and the package has to be manually installed later. ros-kinetic-desktop is my package. – samhitha Mar 23 '17 at 11:25
  • Yes I remember now thanks for the refresher... – George Udosen Mar 23 '17 at 11:30
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Run

sudo apt-get update

(with sudo) to make sure the package list is up to date.

Then use just

apt-get download ros-kinetic-desktop

(without sudo)

If you use sudo then apt-get will download the file not as root but user _apt for security reasons. As _apt doesn't have write permission in home/sam/ you get this error.

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  • I edited my question to add why I cannot use sudo apt-get update. Can you please look into that and let me know if there's a work around? – samhitha Mar 24 '17 at 3:54
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I am not sure of why and how it happened, but restarting the system did the trick! Although it throws the warning ( as above ), the package got downloaded.

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