Final answer:
To see a list of all available packages from internet repositories on an RPM-based Linux system, the command "yum list all" should be used. This includes both installed and installable packages.
Step-by-step explanation:
To list all packages available for installation from the internet repositories configured on a Linux system that uses RPM (Red Hat Package Manager) for package management, you would use the command "yum list all". This command will display all the packages available in the repositories that YUM has access to, including those that are already installed and those that can be installed.
Other listed commands such as "apt-get list" or "yum show available" are either incorrect syntax or are appropriate for different package management systems. "apt-get" is associated with Debian-based systems and not RPM-based systems. And while "yum show available" is not a standard yum command, "yum list available" can be used specifically to show packages that are available to be installed and are not already installed on the system.