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The input of a statement may be redirected from a file by using < file. Similarly, the output of a statement may be sent to a file by using > file, or by using >> file to append output to the end of a file.
The output from standard error may be redirected by using 2> file to send it to a file, or by using 2>> file to append it to the end of a file.
As in the UNIX shell, whitespace between > or < and file is optional.