100%解决gnupg, gnupg2 and gnupg1 do not seem to be installed

Kali-Linux     apt-get update不了，换源要安装KEY，安装KEY要安装gnupg，安装gnupg要apt-get update，死循环啊

执行sudo apt-get update后，Kali报错：

Get:1 http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease [30.6 kB]

Err:1 http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease

  The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <[e-mail]>

Fetched 30.6 kB in 1s (20.7 kB/s)

Reading package lists... Done

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <[e-mail]>

W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/InRelease  The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <[e-mail]>

W: Some index files failed to download. They have been ignored, or old ones used instead.

这个时候需要安装一个key。

可以浏览器访问：https://http.kali.org/kali/pool/main/k/kali-archive-keyring/然后看里面文件名是什么。现在是 kali-archive-keyring_2022.1_all.deb 这个名字可能过几天会变得

执行下面命令：

wget https://http.kali.org/kali/pool/main/k/kali-archive-keyring/kali-archive-keyring_2022.1_all.deb --no-check-certificate

然后：

sudo apt install ./kali-archive-keyring_2022.1_all.deb

愉快的 sudo apt update 去吧