无法在Ubuntu18.04上安装网络管理器-L2TP

Question

试图在Ubuntu 18.04上安装网络管理器-L2TP。

sudo add-apt-repository ppa:nm-l2tp/network-manager-l2tp
sudo apt-get update
sudo apt-get install network-manager-l2tp-gnome

在这个命令之后

sudo add-apt-repository ppa:nm-l2tp/network-manager-l2tp

我明白了：

    ...    
    E: The repository 'http://ppa.launchpad.net/nm-l2tp/network-manager-l2tp/ubuntu bionic 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.
    E: The repository 'http://ppa.launchpad.net/seriy-pr/network-manager-l2tp/ubuntu bionic 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.

我怎样才能解决这个问题？

Answer 1

正如我们在与@Jos交谈时在评论中发现的：

Ubuntu18.04LTS不需要上述的PPA (ppa:ubuntu/network-manager-l2tp)。

如果您已经添加了它-用以下方式删除它：

sudo ppa-purge ppa:ubuntu/network-manager-l2tp

所有包都可以在宇宙存储库中使用(请参阅链接为network-manager-l2tp和链接为libreswan)。

因此，您所需要的只是启用宇宙存储库并从其中安装包：

sudo add-apt-repository universe
sudo apt-get update
sudo apt-get install network-manager-l2tp-gnome