Shell Programming and Scripting

For me below code is working (SunOS 5.9 .. KSH) ...
Better place your code ...

mychk.txt
========
new line added
testing purpose
check for 1 2
for 2 also 4
form 3 also 5 6
for testing only
@@@@@@@@@

for i in `grep -n 'for' mychk.txt | cut -d: -f1`
> do
> endrow=`expr $i + 0`
> strow=`expr $i - 2`
> myline=`echo "sed -n ""${strow},${endrow}p"" mychk.txt"`
> #echo $myline
> $myline; echo "\n"
> done

=== Result
new line added
testing purpose
check for 1 2


testing purpose
check for 1 2
for 2 also 4


check for 1 2
for 2 also 4
form 3 also 5 6


for 2 also 4
form 3 also 5 6
for testing only
====

Dear Kesari,

From the output echo messages it seems yes, how to append these messages in to a output text file.

Best Regards.

Redirect the output (>) ...