命令打印出当前目录下的所有文件和目录列表。
The find . command prints out the list of all files and directories in the current directory and under.
shift从参数列表中删除所有已处理的参数,保留待处理的文件和目录列表。
Shift removes all the processed arguments from the argument list, leaving the list of files and directories to process.
同样,和前一个列表相同,它与该目录中的任何文件的时间戳都不同。
Also, as in the previous listing, it is different from the timestamps of any of the files in the directory.
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