: It could be a utility to disable specific "White List" or "Sign Check" security features in the Kylin environment to allow unauthorized third-party apps.
Could you clarify where you obtained this file or you are trying to solve? Knowing the specific context (e.g., "I'm trying to fix a printer driver on Kylin OS") would allow me to give you more precise steps.
: Use the terminal command sudo apt install p7zip-full . On Windows : Use 7-Zip .