这是问题 952287：[用户反馈 - 稳定] 由于 GPG 签名密钥过期，Linux 版 Chrome 无法安装/更新的报告
今天，apt在我所有的机器上运行时，谷歌 PPA 都会出现这个错误（对于google-chrome）：
me@mymachine:~$ sudo apt clean && sudo apt update && sudo apt full-upgrade -y && sudo apt autoremove -y && sudo apt autoclean -y && sudo snap refresh
[sudo] password for me:
Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu bionic InRelease
Hit:3 http://dl.google.com/linux/chrome/deb stable Release
Hit:4 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88,7 kB]
Get:6 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74,6 kB]
Err:7 http://dl.google.com/linux/chrome/deb stable …W: GPG error: http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2F7F0DA5FD5B64B9
W: The repository 'http://download.opensuse.org/repositories/home:/strycore/xUbuntu_16.04 ./ Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
我试图摆脱上面似乎与释放密钥和 opensuse url 相关的错误消息。
什么是正确的解决方案？