Linux以字节显示内存大小
youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -b
total used free shared buffers cached
Mem: 3177537536 1761021952 1416515584 8433664 69103616 715993088
-/+ buffers/cache: 975925248 2201612288
Swap: 4094685184 0 4094685184
youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free --bytes
total used free shared buffers cached
Mem: 3177537536 1760796672 1416740864 8433664 69111808 715997184
-/+ buffers/cache: 975687680 2201849856
Swap: 4094685184 0 4094685184