Question

Could someone answer how many processes are created in each case for the commands below as I dont understand it :

以下三个指挥机构具有大致相同的效果:

Answer 1

Exactly 2 processes - 1 for rm, the other for find.
3 or more processes. 1 for find, another for xargs, and one or more rm. xargs will read standard input, and if it reads more lines than can be passed as parameters to a program (There is a maximum value named ARG_MAX).
Many processes, 1 for find and another one for each file ending in .o for rm.

我认为,备选方案2是最好的,因为它正确地处理最大参数限制,并且 too开太多的过程。然而,我更喜欢这样使用(在民盟发现和xargs的情况下):

find . -type f -name  *.o  -print0 | xargs -0 rm

这终止了每个档案名称的“<>/code>,而不是一条新线,因为UNIX的档案名称在法律上可以有新线。这也正确地处理档案名称中的空间(比较常见)。