unix清除文件中的内容而不删除任何目录

Question

我有一个目录“ADir”，包含递归的一些目录。

我可以运行什么unix命令来确保

1) directories are not deleted AND 
2) NO file is deleted
3) all the files currently present contain only one data and that is 0 

以及

的命令

1) directories are not deleted AND 
2) NO file is deleted
3) all the files currently present are  emptied out 

Answer 1

使用find(1)：

1. echo 0 > {} :( {}替换为匹配的文件路径）

   find ADir -type f -exec sh -c "echo 0 > {}"  \;
   

2. > {}：

   find ADir -type f -exec sh -c "> {}"  \;
   

<强>更新

对于大量文件，请使用单个shell实例：

find Adir -type f | while read path; do echo 0 > $path; done

find Adir -type f | while read path; do > $path; done