What information does the ip link show command provide?

The command "ip link show" is focused on displaying details about the network interfaces on a Linux system. When executed, it provides information such as the state of each interface (up or down), the interface name, their MAC addresses, and additional attributes like the MTU (Maximum Transmission Unit) size. This command is particularly useful for network troubleshooting or configuration, as it gives users a clear insight into the available network interfaces and their statuses.

Understanding the context of the other options can clarify why they do not pertain to the information provided by this command. For instance, the status of running services is more related to system service managers and utilities, while system memory usage pertains to commands like "free" or "top." Process IDs of currently running programs require different commands like "ps" or "top," which are designed to monitor active processes rather than network interfaces.