: Distribution of multiple setup files in a single compressed package, such as Linux drivers or virtual machine images like Kali Linux.

Are you trying to a file you found, or are you looking to create a post for a specific community? Setting up Kali Linux on Ubuntu - Packt

To access the contents of a .7z file, you need specialized software: : Download the official 7-Zip client. macOS : Use apps like The Unarchiver or Keka .