bug#21128: Is this a BUG? Please Help Me !

[liuquan]

Dear, engineer! 

I'm writing this E-mail to you since I think I've found something wrong in Ubuntu!

My Operating System here is Ubuntu Kylin 14.04.

I find a question about command 'paste' in command line.

Support there is a file called "test.txt", and its content is the next 2 lines:

ab

cd

If I run the command "paste test.txt", the content of this file will be print at STDOUT. However, when I ran the command "paste test.txt > test.txt" I found that the file "test.txt" became an empty file. Here comes the question, what's going on? Can you help me?

 

 

Yours faithfully,

Quan Liu from Central South University!

 

2015-07-24

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Quan Liu