Greetings!
tolits wrote:
> thanks. Im just confused with Channel 2, is it the same as errorlevel?
No - that would be the shell variable $?
In Unix you have one input and two output channels:
STDIO - the standard input and output
STDERR - output for error and debug messages (usually)
With this you can pipe the ins and outs of commands
( e.g. cat *.log | sort | uniq > error_summary.log ) and still see error
messages which otherwise won't show up in the pipe (in above example: no
error messages in summe.txt).
With 2>&1 you plumb the separate STDERR pipeline back into the standard
STDIO. With > /dev/null you plug the output into the file or device
(here: the data dump /dev/null).
HTH
Volker
--
Volker Tanger <[EMAIL PROTECTED]>
Wrangelstr. 100, 10997 Berlin, Germany
DiSCON GmbH - Internet Solutions
http://www.discon.de/
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