$ curl cheat.sh/
# vmstat
# Report information about processes, memory, paging, block IO, traps, disks and CPU activity.
# More information: <https://manned.org/vmstat>.

# Display virtual memory statistics:
vmstat

# Display reports every 2 seconds for 5 times:
vmstat 2 5

$
Follow @igor_chubin cheat.sh tldr