FreeBSD: Get Kernel State

Command (Physical memory):

$ sysctl hw.physmem


Result:

hw.physmem: 108580864


Command (Free disk space in human readable format):

$ df -h


Result:

Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ada0p2    9.2G    1.7G    6.8G    20%    /
devfs          1.0K    1.0K      0B   100%    /dev