Which command is used to manage IP sets and requires superuser privileges?

The command used to manage IP sets and requires superuser privileges is ipset. This tool allows users to create and manage sets of IP addresses, which can be particularly useful in firewall configurations. It enables the efficient handling of large sets of IP addresses by grouping them together, allowing for easier and faster rule management compared to traditional methods.

Using ipset, administrators can add or remove IP addresses from sets, list current sets, or use them in combination with iptables to manage network filtering rules effectively. This feature is especially beneficial in scenarios where you need to block or allow traffic from multiple IP addresses without needing to create extensive individual rules in iptables.

Utilizing superuser privileges is essential because manipulating IP sets can significantly affect network security and performance, requiring authorized access to execute such operations.