输入和输出重定向到同一个文件
我怎么能输入输出重定向到一般相同的文件？我的意思是特别有 -o 为排序命令，并有可能对不同的命令其他类似的选项。但是，我怎么能一般输入输出重定向到同一个文件，而不重挫文件？
How can I redirect input and output to a same file in general? I mean specifically there is -o for sort command and there might be other such options for various command. But how can I generally redirect input and output to same file without clobbering the file?
例如：排序A.TXT＆GT; A.TXT 破坏A.TXT文件的内容，但我想答案存储在同一个文件。我知道我可以使用 MV 和 RM 使用临时文件，但它是可以直接做后？
For example: sort a.txt > a.txt destroys the a.txt file contents but I want to store answer in the same file. I know I can use mv and rm after using temporary file, but is it possible to do it directly?
作为的 BashPitfalls条目＃13 ，则可以使用海绵从 moreutils 来吸收打开文件之前将数据写入到它。
As mentioned on BashPitfalls entry #13, you can use sponge from moreutils to "soak up" the data before opening the file to write to it.
使用示例：排序A.TXT |海绵A.TXT
虽然BashPitfalls页提到，有可能是数据丢失，海绵手册页说。
While the BashPitfalls page mentions that there could be data loss, the man page for sponge says
它还通过重命名一个临时文件到位创建输出文件原子[...]
It also creates the output file atomically by renaming a temp file into place [...]
这会使它没有更多的危险比写入一个临时文件，并做了 MV 。
This would make it no more dangerous than writing to a temp file and doing a mv.
感谢查尔斯达菲以指出在评论中BashPitfalls项。
Credit to Charles Duffy for pointing out the BashPitfalls entry in the comments.