Shell中的＞/dev/null 2＞&1 与 2＞&1 ＞/dev/null 与&＞/dev/null 的区别

https://blog.csdn.net/reyleon/article/details/11595985?spm=1001.2101.3001.6650.14&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-14-11595985-blog-53367353.235%5Ev43%5Epc_blog_bottom_relevance_base5&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-14-11595985-blog-53367353.235%5Ev43%5Epc_blog_bottom_relevance_base5&utm_relevant_index=15