Shell Programming and Scripting

number=`head -n 1 text3 | awk '{print $4}'`

while read LINE
do
 echo "$LINE" | grep -q "^LINE"
 if [ $? -eq 0 ]; then
  echo "$number $LINE"
 else
  echo "$LINE"
  number=`echo "$LINE" | awk '{print $4}'`
 fi
done < yourFile

[project4] # ./import                                       
head: cannot open text3: No such file or directory (error 2)

number=`head -n 1 yourFile | awk '{print $4}'`

while read LINE
do
 echo "$LINE" | grep -q "^LINE"
 if [ $? -eq 0 ]; then
  echo "$number $LINE" >> resultFile
 else
  echo "$LINE" >> resultFile
  number=`echo "$LINE" | awk '{print $4}'`
 fi
done < yourFile

mv resultFile yourFile