显示系统内存使用情况
free [-m / -g / -h]
[root@localhost test]# free -m total used free shared buff/cache available Mem: 1823 715 180 10 927 833 Swap: 2047 0 2047 [root@localhost test]# free -g total used free shared buff/cache available Mem: 1 0 0 0 0 0 Swap: 1 0 1 [root@localhost test]# free -h total used free shared buff/cache available Mem: 1.8G 715M 180M 10M 927M 833M Swap: 2.0G 44K 2.0G [root@localhost test]#
原文：http://www.cnblogs.com/tdcqma/p/5848851.html