bash - 我是否需要生成第二个文件来对文件进行排序？

Question

我想对一堆文件进行排序。我能行

sort file.txt > foo.txt
mv foo.txt file.txt

但是我需要第二个文件吗？

(当然，我尝试了 sort file.txt > file.txt，但最终得到的是一个空文件。)

Answer 1

尝试:

sort -o file.txt file.txt

参见 http://ss64.com/bash/sort.html

`-o OUTPUT-FILE'
     Write output to OUTPUT-FILE instead of standard output.  If
     OUTPUT-FILE is one of the input files, `sort' copies it to a
     temporary file before sorting and writing the output to
     OUTPUT-FILE.