# top > Display dynamic real-time information about running processes. > More information: . - Start `top`, all options are available in the interface: `top` - Start `top` sorting processes by internal memory size (default order - process ID): `top -o mem` - Start `top` sorting processes first by CPU, then by running time: `top -o cpu -O time` - Start `top` displaying only processes owned by given user: `top -user {{user_name}}` - Display help about interactive commands: `?`