#!/bin/bash if [ $# -gt 2 ]; then echo "Usage : $0 [] []" else if [ $1 ]; then itr=$1 else itr='10' fi if [ $2 ]; then len=$2 else len='15' fi for ((n=0;n<$itr;n++)); do dd if=/dev/urandom count=1 2> /dev/null | /usr/bin/gmimeuuencode -m -| sed -ne 2p | cut -c-$len; done fi