Which command displays real-time processor utilization in a readable format?

The command that displays real-time processor utilization in a highly readable format is "htop." This tool is an interactive process viewer that provides a visually appealing interface, making it easy to monitor system resource usage, including CPU, memory, and processes. It allows users to sort the information, use color to indicate resource usage levels, and even send signals to processes directly from the interface.

In contrast, while "top" also provides real-time monitoring of processor utilization and is useful for monitoring system performance, its interface is less visually structured than that of "htop." The "ps" command shows a snapshot of current processes but does not provide real-time information or an interactive interface. "ps aux" is a variation that also gives a snapshot but includes more details about each process, yet still lacks the dynamic, real-time display and interactive capabilities that "htop" offers. Hence, "htop" stands out as the most suitable choice for displaying real-time processor utilization in a user-friendly manner.