Tried to install numix-gtk-theme on Ubuntu 22.04 LTS in a VirtualBox VM, but add-apt-repository couldn't find ppa:numix/ppa:
$ sudo add-apt-repository ppa:numix/ppa
[sudo] password for user:
Repository: 'deb https://ppa.launchpadcontent.net/numix/ppa/ubuntu/ jammy main'
Description:
The official PPA for the Numix Project - http://numixproject.org
The PPA consists of various artwork packages from the Numix Project.
More info: https://launchpad.net/~numix/+archive/ubuntu/ppa
Adding repository.
Press [ENTER] to continue or Ctrl-c to cancel.
Adding deb entry to /etc/apt/sources.list.d/numix-ubuntu-ppa-jammy.list
Adding disabled deb-src entry to /etc/apt/sources.list.d/numix-ubuntu-ppa-jammy.list
Adding key to /etc/apt/trusted.gpg.d/numix-ubuntu-ppa.gpg with fingerprint 43E076121739DEE5FB96BBED52B709720F164EEB
Get:1 http://ar.archive.ubuntu.com/ubuntu jammy InRelease [270 kB]
Hit:2 https://packages.microsoft.com/repos/code stable InRelease
Hit:3 https://ppa.launchpadcontent.net/git-core/ppa/ubuntu jammy InRelease
Hit:4 https://ppa.launchpadcontent.net/gottcode/gcppa/ubuntu jammy InRelease
Hit:5 http://ar.archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:6 http://ar.archive.ubuntu.com/ubuntu jammy-backports InRelease
Hit:7 http://ar.archive.ubuntu.com/ubuntu jammy-security InRelease
Ign:8 https://ppa.launchpadcontent.net/numix/ppa/ubuntu jammy InRelease
Err:9 https://ppa.launchpadcontent.net/numix/ppa/ubuntu jammy Release
404 Not Found [IP: 91.189.95.85 443]
Reading package lists... Done
E: The repository 'https://ppa.launchpadcontent.net/numix/ppa/ubuntu jammy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Tried to install
numix-gtk-theme
on Ubuntu 22.04 LTS in a VirtualBox VM, butadd-apt-repository
couldn't findppa:numix/ppa
: