Shell Programming and Scripting

Hi all,


I am trying to replace a few lines with other lines of all files in a directory which contain those few lines.

say - there are some 10 files in a dir having the same 4 lines as 1.txt at the starting
1.txt
line 1
line 2
line 3
line 4
....................................
....................................
....................................


i would like to replace all the 10 files with these lines in place of the pervious four lines.

this is one
this is two
this is three
..........................................
.........................................
........................................


i was able to change upto a line ie one line with no new line character ,i could not do it for multiple lines.

here is the code for one line replacement

Code:

#!/bin/sh

echo "Enter the string to be changed :"
read stringToBe
clear


echo "Enter the string to be replaced"
read repWord
clear


for file in $( grep -il $stringToBe   * )
do
sed -e "s/$stringToBe/$repWord/" $file > /tmp/tempfile.tmp
mv /tmp/tempfile.tmp $file
done

could the forum help me in replacing old multiple lines with new multiple lines.