Bash Cookbook

How to do it...

Open a terminal and create a new script called data-maker.sh.

The following is the code snippet of the script:

#!/bin/bashN_FILES=3TYPE=binaryDIRECTORY="qa-data"NAME="garbage"EXT=".bin"UNIT="M"RANDOM=$$TMP_FILE="/tmp/tmp.datamaker.sh"function get_random_number() {   SEED=$(($(date +%s%N)/100000))  RANDOM=$SEED  # Sleep is needed to make sure that the next time rnadom is ran, everything is good.  sleep 3  local STEP=$1  local VARIANCE=$2  local UPPER=$3  local LOWER=$VARIANCE  local ARR;    INC=0  for N in $( seq ${LOWER} ${STEP} ${UPPER} );   do    ARR[$INC]=$N    INC=$(($INC+1))  done    RAND=$[$RANDOM % ${#ARR[@]}]  echo $RAND}

Let's begin the execution of the script using the following command. It uses the -t flag for type and is set to text ...