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Tip #94   Overwrite a file with zeroes

Overwrites a file with zeroes.
Put in in your .bashrc or .bash_profile in Mac OS X. 

zero() {

        case "$1" in

                "")     echo "Usage: zero <file>"

                        return -1;

        esac

        filesize=`wc -c  "$1" | awk '{print $1}'`

        `dd if=/dev/zero of=$1 count=$filesize bs=1`

}

 
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