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what does the operation '>&' mean in a shell script what does the operation '>&' mean in a shell script
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Old 05-17-2008
cy163 cy163 is offline
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what does the operation '>&' mean in a shell script
hi, all,

i saw a syntax like this

usr/local/mpiexec -np 8 /home/XXXX/program_exe >& ./temp/out

the output will be put into ./temp/out.

I want to know the meaning of the operation symbol '>&'.


Thanks
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Old 05-17-2008
era era is offline Forum Advisor  
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It redirects standard error as well as standard output to the file in question.

See the manual page of your shell for detailed information about redirection operators.
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Old 05-17-2008
matrixmadhan matrixmadhan is offline Forum Advisor  
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Quote:
Originally Posted by era View Post
It redirects standard error as well as standard output to the file in question.

See the manual page of your shell for detailed information about redirection operators.
in that case,
shouldn't that be as
>1 2>&1
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Old 05-17-2008
era era is offline Forum Advisor  
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It should, but it's available as a shorthand at least in bash. The manual discourages this use. I imagine it's offered for compatibility with older shells.
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