Which command shows processes in real-time in a Linux system?

The command that shows processes in real-time in a Linux system is "top." This command provides a dynamic, real-time view of running processes, allowing users to monitor system performance, memory usage, CPU load, and other critical system metrics. When you run the "top" command, it continuously updates the display every few seconds, giving you immediate feedback on what processes are consuming resources. This makes it an invaluable tool for system administrators who need to maintain and troubleshoot system performance.

The other commands listed serve different purposes: "ps -elf" displays a snapshot of current processes but does not update in real-time; "ll" is typically an alias for "ls -l," which lists directory contents with details; and "ifconfig" is used for configuring network interfaces, not monitoring processes.