The key(s) in the keyring /etc/apt/trusted.gpg.d/appstore.gpg are ignored as the file has an unsupported filetype.

问题描述：执行sudo apt update报警告

W: https://community-packages.deepin.com/printer/dists/eagle/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/appstore.gpg are ignored as the file has an unsupported filetype.

解决方法： 删除/etc/apt/trusted.gpg.d/appstore.gpg 或者将其重命名为.bak

cd /etc/apt/trusted.gpg.d/
sudo mv appstore.gpg appstore.gpg.bak