查看一个目录文件的大小
du -h --max-depth=1 ./test 1.7M ./test
https://mp.weixin.qq.com/s?__biz=MzU3NTgyODQ1Nw==&mid=2247551972&idx=1&sn=204ae5842c17120a8e03169a01ba14ff&chksm=fd1f7362ca68fa74cb7397432ec77364201d469ca197909d2a065118003393e095c195cdb5e1#rdopen in new window
