This script will ask the file name and the pattern which need to be searched in file and give the formatted output with the line no with line. You can select the no of lines which display before and after the string.

search_pattern.sh

#!/bin/ksh

echo "enter the file name"
read V_file_name

echo "enter the string to be searched"
read V_string

line_num=`grep -n "$V_string" $V_file_name|awk -F":" '{print $1}'`

echo "The entered string occurs at the following line(s) in the file"
echo $line_num

echo "enter the required line number"
read V_req_line_num

echo "How many lines before and after the string would you like to be displayed ?"
read V_bef_aft

var_1=$(($V_bef_aft+1))
var_2=$(($V_req_line_num+$V_bef_aft))

head -$V_req_line_num $V_file_name|tail -$var_1 > req_file.txt
head -$var_2 $V_file_name|tail -$V_bef_aft >> req_file.txt

echo "The required text is....."
cat req_file.txt