What is the command used to review and track the number of available subscriptions in Red Hat?

The command used to review and track the number of available subscriptions in Red Hat is "subscription-manager list." This command is part of the subscription-manager utility, which is specifically designed for managing Red Hat subscriptions. By executing this command, users can view detailed information about their subscriptions, including their status, which subscriptions are available, and the systems that are currently utilizing those subscriptions.

The output from this command provides key insights necessary for effective subscription management, allowing administrators to ensure systems are properly registered and have access to the necessary entitlements. This is important for maintaining compliance and for troubleshooting subscription-related issues.

Other options, while they may seem relevant to managing subscriptions, do not exist as valid commands in Red Hat's subscription management toolkit. Therefore, they do not effectively serve the purpose of tracking available subscriptions as the correct command does.