понедельник, 17 декабря 2012 г.

Confusion about 1>&2 and 2>&1

Can anybody tell me the difference between 1>&2 and 2>&1?
 
Answer:
 
1 is stdout; 2 is stderr

By default stdout is the "normal" stream for program out, stderr is for errors and warnings only. Both of those statments combine stdout and stderr into one stream - the first places all stderr and stdout output on 2, the second places all output on 1

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