🛠️ Issue Summary – GPG Key Error When Running `sudo apt update` on Fresh Kali Install

Image -> https://postimg.cc/WtZ6QD3V <-Image Hi all, I just installed Kali Linux and ran:

sudo apt update

But I got this error:

GPG error: http://mirrors.tuna.tsinghua.edu.cn/kali  kali-rolling InRelease: 
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 827CB569F2518CC677FECA1AED65462ECB5E4C5
E: The repository is not signed.

I also saw warnings about apt-key being deprecated, and attempts to use curl | gpg returned a 404. --- **What I Want:** I don’t care about using the Tsinghua mirror — I just want a clean fix using the **official Kali sources and keys**. --- **What I’ve Tried:** * Replacing the mirror in /etc/apt/sources.list with the official Kali one. * Using the modern gpg --dearmor method to import the official Kali archive key. My sources.list [I copied it from chatgpt, its not the default one]

# See https://www.kali.org/docs/general-use/kali-linux-sources-list-repositories/ 
deb [signed-by=/etc/apt/keyrings/tuna-kali.gpg] http://mirrors.tuna.tsinghua.edu.cn/kali  kali-rolling main non-free contrib

# Additional line for source packages
# deb-src http://http.kali.org/kali  kali-rolling main contrib non-free non-free-firmware

Thanks in advance!