How to redirect output from dd command to /dev/null ?
If you want to redirect the data output, use the
dd if=/dev/urandom of=/dev/null count=1
If you want to redirect both the data output and the progress messages:
dd if=/dev/urandom count=1 >/dev/null 2>&1
If you want to save the data and throw away the messages:
dd if=/dev/urandom of=output_file count=1 2>/dev/null
In these examples
/dev/urandom and the
count argument are simply being used for demonstration.
dd sends what it read from
stdout, but usually (always?) one wants to redirect it to a file. Use the
of parameter for that.
dd if=from of=to
So you want to replace