Ubuntu 17.04 install from repos some repos 404 Not FOUND.

[Darth Anubis]

Installed by following the instructions from the GQRX PPA page.

Err:17 http://ppa.launchpad.net/ettusresearch/uhd/ubuntu zesty/main i386 Packages

  404  Not Found

Reading package lists... Done

W: The repository 'http://ppa.launchpad.net/ettusresearch/uhd/ubuntu zesty Release' does not have a Release file.

N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.

N: See apt-secure(8) manpage for repository creation and user configuration details.

E: Failed to fetch http://ppa.launchpad.net/ettusresearch/uhd/ubuntu/dists/zesty/main/binary-i386/Packages  404  Not Found

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

[Alexandru Csete]

This will happen every time a new version of ubuntu comes out.
Projects need time to update their repositories and so in the mean
while you will get a few "not found" errors. Gqrx should still work
fine.

Alex