# atop > Linux system and process monitor. > More information: . - Start: `atop` - Start and display memory consumption for each process: `atop -m` - Start and display disk information: `atop -d` - Start and display background process information: `atop -c` - Start and display thread-specific resource utilization information: `atop -y` - Start and display the number of processes for each user: `atop -au` - Display help about interactive commands: `?`