Combine Output Streams with >&
How to use the duplication redirection to combine one output stream into another output stream? I want to combine STDERR and STDIN together and send them to a file.
To combine one output stream into another output stream, you can use the duplication redirection operator as described below:
command options redirections x>&y Combines output stream handler x into y
For example, the following combines handler 2 (STDERR) into handler 1 (STDOUT). So info.txt will get both outputs and error.txt will be empty.
C:\fyicenter>dir junk 1> info.txt 2>error.txt 2>&1
For example, the following combines handler 1 (STDOUT) into handler 2 (STDERR). So error.txt will get both outputs and info.txt will be empty.
C:\fyicenter>dir junk 1> info.txt 2>error.txt 1>&2
Note that duplication redirection must be specified after other redirections. The following will not work:
C:\fyicenter>dir junk 1>&2 1> info.txt 2> error.txt
2021-05-15, 2186👍, 0💬
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