运行sudo apt-get update报错apt-secure(8)及GPG签名问题求助

Hey there, let's work through these apt update errors one by one—they're super common with third-party game-focused repos, so no need to panic!

1. Weak Digest Algorithm (SHA1) Warning for Intel Graphics Repo #

W: https://download.01.org/gfx/ubuntu/16.04/main/dists/xenial/InRelease: Signature by key 09D6EF97BFB38E916EF060E756A3DEF863961D39 uses weak digest algorithm (SHA1)

This is just a warning, not a showstopper. The Intel repo for Ubuntu 16.04 uses the older SHA1 hashing method, which modern systems flag as less secure. Your updates will still run fine if you trust the Intel repo (which you should for official graphics drivers). If you want to make the warning go away:

• Option 1: Ignore it (totally safe if you rely on Intel's graphics drivers)
• Option 2: If you don't need this repo anymore, delete its config file from /etc/apt/sources.list.d/ to remove it entirely. Note that Ubuntu 16.04 is end-of-life, so there's no updated official Intel repo available.

2. Missing Public Key for PlayOnLinux Repo #

W: GPG error: http://deb.playonlinux.com trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 73F0D6E88E3D6C3A

This is an easy fix—you just need to add the missing public key to your system. Run this command in your terminal:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 73F0D6E88E3D6C3A

3. GPG Error for OpenSUSE home:strycore Repo #

Your error text got cut off, but based on the context, this is almost certainly another missing public key issue (this repo is often used for game tools like Lutris, included in Ubuntu Game Packs). Fix it by importing the repo's official key with this command:

wget -q https://download.opensuse.org/repositories/home:strycore/xUbuntu_16.04/Release.key -O- | sudo apt-key add -

Once you've run these fixes, execute sudo apt-get update again—those errors should be gone!

内容的提问来源于stack exchange，提问作者Boio