Difference among various logging methods

[Sabniveesu Shashank]

[Avoiding application specific details for brevity; Please ask if needed]

Hi!

I could log data from an NS3 script into terminal. To save it, I did

./waf --run=first|tee first.txt   (I see output on terminal; just an
empty file is created)

./waf --run=first > first.txt     (I see output on terminal; just an
empty file is created)

./waf --run=first >& first.txt    (saved 327 MB)

I found the last one in a blog. I don't understand why it alone is working.

Can someone respond?

Thanks




S.V.R.S.N. Shashank
about.me/shashank.computers
    <http://about.me/shashank.computers>

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