UNIX for Dummies Questions & Answers

#!/bin/ksh
inDir=$1 #Input Directory
outDir=$2 #output directory
timeStmpExpr='_[0-9]\{8\}.[0-9]\{6\}.txt'
echo 'Just before ls 11111'
ls ${inDir}
echo 'Just before ls-grep 22222'
ls ${inDir} | grep $timeStmpExpr
echo 'Just before ls-grep-while 22222'
ls ${inDir} | grep $timeStmpExpr | \
while read inFile
do
  echo "inside loop==========================="
  mFullInName=${inDir}'/'${inFile}
  FName=`echo ${inFile} | sed "s/\(.*\)${timeStmpExpr}/\1/"`
  mFullOutName=${outDir}'/'${FName}'.txt'
  echo 'inFile = '${inFile}' outFile = '${outFile}' FName = '${FName}
  echo 'mFullInName = '${mFullInName}' mFullOutName = '${mFullOutName}
  sed '1d;$d' ${mFullInName} > ${mFullOutName}
  rm -f ${mFullInName}
done
echo "FIle copying Completed"