After upgrading to Ubuntu Zesty 17.04 I'd like to install a cool wallpaper but that apt-get installation fails with following
W: GPG error: http://ppa.launchpad.net/realtime.sunlight.wallpaper/rsw/ubuntu quantal Release: The following signatures were invalid: 471A70A2000BD747ED3E0F6C15A8576D6E46FCAD
W: The repository 'http://ppa.launchpad.net/realtime.sunlight.wallpaper/rsw/ubuntu quantal Release' is not signed.
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.
How can I sign this manually and have apt-get
always ignore that warning?
Thanks for any clues!
dpkg -i
orgdebi
.