我有与描述相同的错误和相同的系统Apt Update 导致 Wireguard 出错但是，出于某种原因，那里给出的解决方案对我来说不起作用
bash shell 输出：
drusakov@ldn-dr:~$ sudo apt-add-repository --remove ppa:wireguard/wireguard
Cannot add PPA: 'ppa:~wireguard/ubuntu/wireguard'.
The team named '~wireguard' has no PPA named 'ubuntu/wireguard'
Please choose from the following available PPAs:
drusakov@ldn-dr:~$ sudo apt-get update
Hit:1 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal InRelease
Err:2 http://ppa.launchpad.net/wireguard/wireguard/ubuntu focal InRelease
403 Forbidden [IP: 2001:67c:1560:8008::15 80]
Hit:3 http://packages.cloud.google.com/apt cloud-sdk InRelease
Hit:4 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:5 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:6 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:8 https://download.sublimetext.com apt/stable/ InRelease
Hit:9 http://archive.ubuntu.com/ubuntu focal-security InRelease
Reading package lists... Done
E: Failed to fetch http://ppa.launchpad.net/wireguard/wireguard/ubuntu/dists/focal/InRelease 403 Forbidden [IP: 2001:67c:1560:8008::15 80]
E: The repository 'http://ppa.launchpad.net/wireguard/wireguard/ubuntu focal InRelease' is no longer signed.
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.
drusakov@ldn-dr:~$ sudo apt-get install wireguard
Reading package lists... Done
Building dependency tree
Reading state information... Done
wireguard is already the newest version (1.0.20200513-1~20.04.2).
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
drusakov@ldn-dr:~$ lsb_release -r
Release: 20.04
drusakov@ldn-dr:~$ uname -a
Linux ldn-dr 5.4.0-52-generic #57-Ubuntu SMP Thu Oct 15 10:57:00 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
drusakov@ldn-dr:~$ cat /etc/issue
Ubuntu 20.04.1 LTS \n \l
答案1
您需要手动删除 wireguard 源列表。
sudo rm -f /etc/apt/sources.list.d/wireguard*