bash - If redirecting STDERR to STDOUT and redirecting STDOUT to a file, why are STDERR messages not showing in the file? -

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i made quick little script, test.sh, looks following:

echo "stderr" > /dev/stderr echo "stdout" > /dev/stdout

according answers so question, , advanced bash-scripting guide, following should redirect stderr stdout script above:

$ sh /tmp/test.sh 2>&1

and indeed does:

$ sh /tmp/test.sh 2>&1 |tee file; $ cat file stderr stdout

the question wondering output stderr go in following code?

$ sh /tmp/test.sh > file 2>&1 $ cat file stdout

i using gnu bash, version 4.0.24(2)-release.

i'm seeing output stderr going file, expected:

$> sh test.sh > file 2>&1 $> cat file  stderr stdout

this bash 3.2.48.

$> bash --version gnu bash, version 3.2.48(1)-release (x86_64-apple-darwin11)

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