大数据
科普 | 一文读懂 DAG(有向无环图)技术
https://baijiahao.baidu.com/s?id=1613728387077554506&wfr=spider&for=pc
https://baike.baidu.com/item/%E6%9C%89%E5%90%91%E6%97%A0%E7%8E%AF%E5%9B%BE/10972513?fr=aladdin
https://blog.csdn.net/omnispace/article/details/80381329
- java文件编译后额外生成的$1.class是怎么一回事
https://www.aliyun.com/jiaocheng/848594.html
java编译后的文件出现xx$1.class的原因
https://blog.csdn.net/u013703363/article/details/68059296
class$1,class$2,class$innerclass中的$的含义
https://www.cnblogs.com/stefanlee/p/3403445.html
solaris du命令
https://blog.csdn.net/iteye_11541/article/details/82062938
https://docs.oracle.com/cd/E26926_01/html/E29113/mv-1.html#scrolltoc
Solaris 命令 小结
https://jingyan.baidu.com/article/656db918f9640ae381249c82.html
shell echo打印换行的方法
https://blog.csdn.net/lixiaohuiok111/article/details/18313039
shell脚本--echo和printf打印输出
https://www.cnblogs.com/f-ck-need-u/p/5915076.html