# top > Display dynamic real-time information about running processes. > More information: . - Start `top`: `top` - Do not show any idle or zombie processes: `top -i` - Show only processes owned by given user: `top -u {{username}}` - Sort processes by a field: `top -o {{field_name}}` - Show the individual threads of a given process: `top -Hp {{process_id}}` - Show only the processes with the given PID(s), passed as a comma-separated list. (Normally you wouldn't know PIDs off hand. This example picks the PIDs from the process name): `top -p $(pgrep -d ',' {{process_name}})` - Get help about interactive commands: `?`