top
top is a Linux command in the Process Management category, rated intermediate difficulty. Real-time interactive process viewer. Updates every few seconds. The syntax is top [options]. It returns interactive process view. A practical example: top # Press: q=quit, k=kill process, r=renice # Sort by: M=memory, P=CPU, T=time top -u username # Show only user's processes top -b -n 1 # Batch mode (one iteration) A close relative is ps, which reports a snapshot of current processes. A close relative is kill, which sends a signal to a process. Default signal is SIGTERM (terminate). A close relative is killall, which kills all processes matching a given name. More about this category: Linux process management commands — ps, top, kill, killall, pgrep, and more. Manage running processes and system resources. Related Process Management commands: ps, kill, killall, pgrep, pkill, nice, renice, nohup.