tag 21128 notabug close 21128 stop On 24/07/15 09:20, liuquan wrote: > 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?
The shell truncated the file before paste could read it. You need to write to a temp file first. For details see: http://www.pixelbeat.org/docs/unix_file_replacement.html thanks, Pádraig.
