commandline session
$free -b
total used free shared buffers cached
Mem: 2043490304 1840762880 202727424 0 37040128 823631872
-/+ buffers/cache: 980090880 1063399424
Swap: 5984219136 15114240 5969104896
$free -k
total used free shared buffers cached
Mem: 1995596 1795388 200208 0 36196 804388
-/+ buffers/cache: 954804 1040792
Swap: 5843964 14760 5829204
$free -m
total used free shared buffers cached
Mem: 1948 1749 199 0 35 785
-/+ buffers/cache: 928 1020
Swap: 5706 14 5692
$free -g
total used free shared buffers cached
Mem: 1 1 0 0 0 0
-/+ buffers/cache: 0 0
Swap: 5 0 5
$