Linux以GB显示内存大小
youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -g
total used free shared buffers cached
Mem: 2 1 1 0 0 0
-/+ buffers/cache: 0 2
Swap: 3 0 3
youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free --giga
total used free shared buffers cached
Mem: 2 1 1 0 0 0
-/+ buffers/cache: 0 2
Swap: 3 0 3原文：http://www.cnblogs.com/gavanwanggw/p/6885371.html