total       used       free      shared       buffers        cached
Mem:      1009        863        146       0            16             815

-/+ buffers/cache:    31         978
Swap:     0           0          0

$ free -m
             total       used       free     shared    buffers     cached
Mem:          1504       1491         13          0         91        764
-/+ buffers/cache:        635        869
Swap:         2047          6       2041