Summary

Linux is a family of open-source operating systems built around the linux_kernel. You interact through the command_line using a shell like bash. Files live in a single tree with file_paths and a home_directory. Access is controlled by permissions and the root_user via sudo. Software is installed with a package_manager. Running programs are processes. Key settings are stored in environment_variables. Common tools include a text_editor and basic scripting. Popular forms are called distributions.