尝试在 Bionic Beaver 18.04.1 上安装 NordVPN 时出现 GNUPG2 依赖项错误

Question

Ubuntu/Linux 新手，遇到问题。我正在尝试在 18.04.1 Bionic Beaver 上设置 NordVPN，并尝试使用此处网站上的 4 个安装步骤：

https://nordvpn.com/download/linux/

...当我运行第一个命令时，出现此错误：

sudo apt-get install /home/ubuntu/Downloads/nordvpn-release_1.0.0_all.deb
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'nordvpn-release' instead of '/home/ubuntu/Downloads/nordvpn-release_1.0.0_all.deb'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nordvpn-release : Depends: gnupg2 but it is not installable
E: Unable to correct problems, you have held broken packages.

看来我对 GNUPG2 有依赖性问题？所以我接着说：

sudo apt-get install gnupg2
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package gnupg2 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  gpgv gpgsm gnupg-l10n gnupg dirmngr

E: Package 'gnupg2' has no installation candidate

...其次是：

sudo apt show gnupg
Package: gnupg
Version: 2.2.4-1ubuntu1.1
Priority: optional
Section: utils
Source: gnupg2
Origin: Ubuntu
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Debian GnuPG Maintainers <pkg-gnupg-maint@lists.alioth.debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 370 kB
Depends: dirmngr (= 2.2.4-1ubuntu1.1), gnupg-l10n (= 2.2.4-1ubuntu1.1), gnupg-utils (= 2.2.4-1ubuntu1.1), gpg (= 2.2.4-1ubuntu1.1), gpg-agent (= 2.2.4-1ubuntu1.1), gpg-wks-client (= 2.2.4-1ubuntu1.1), gpg-wks-server (= 2.2.4-1ubuntu1.1), gpgsm (= 2.2.4-1ubuntu1.1), gpgv (= 2.2.4-1ubuntu1.1)
Suggests: parcimonie, xloadimage
Breaks: debsig-verify (<< 0.15), dirmngr (<< 2.2.4-1ubuntu1.1), gnupg2 (<< 2.1.11-7+exp1), libgnupg-interface-perl (<< 0.52-3), libgnupg-perl (<= 0.19-1), libmail-gnupg-perl (<= 0.22-1), monkeysphere (<< 0.38~), php-crypt-gpg (<= 1.4.1-1), python-apt (<= 1.1.0~beta4), python-gnupg (<< 0.3.8-3), python3-apt (<= 1.1.0~beta4), software-properties-common (<= 0.96.24.3)
Replaces: gnupg2 (<< 2.1.11-7+exp1)
Homepage: https://www.gnupg.org/
Task: ubuntu-desktop, mail-server, cloud-image, samba-server, server, kubuntu-desktop, xubuntu-core, xubuntu-desktop, lubuntu-desktop-share, lubuntu-gtk-desktop, lubuntu-desktop, lubuntu-qt-core, lubuntu-qt-desktop, lubuntu-qt-desktop, ubuntustudio-desktop-core, ubuntustudio-desktop, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop, ubuntu-budgie-desktop
Supported: 5y
Download-Size: 249 kB
APT-Manual-Installed: yes
APT-Sources: http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
Description: GNU privacy guard - a free PGP replacement
 GnuPG is GNU's tool for secure communication and data storage.
 It can be used to encrypt data and to create digital signatures.
 It includes an advanced key management facility and is compliant
 with the proposed OpenPGP Internet standard as described in RFC4880.
 .
 This package contains the full suite of GnuPG tools for cryptographic
 communications and data storage.

N: There is 1 additional record. Please use the '-a' switch to see it

来源：gnupg2？

在我尝试更长的安装过程之前，我假设我会遇到这个问题（如果不是更多问题的话），是否有关于如何解决此 gnupg2 依赖问题并安装 NordVPN 的建议？或者有什么我可以尝试的吗？我宁愿使用最新的 Ubuntu 而不必降级。我不可能是唯一经历过这种事的人。我已经从 Ubuntu 站点重新安装了 18.04 两次。谢谢！

Answer 1

apt-get update遇到了同样的问题，通过在安装之前运行来解决gnupg。