Extracting substring from string

Shell Programming and Scripting
1

Hi awk and sed gurus,

Please help me in the following.

I have the following entries in the file

ABCDErules
AbHDPrules
ABCrules

--
--

and other entries in the file.

Now, I want to extract from the file that contain entries for *rules and process it separately.
How can i do it with sed or awk command. Please help.

-San

2

Do you want to filter the lines which contains "rules"?
Please post the expected output from the above sample. and how do you want to process them.

3

hi use following :

for i in `grep 'rules$' filename`
do
......
......
done

Hope this is what u are looking for...

4

I want to extract this output to some variable and process one by one using for loop.
ABCDErules
AbHDPrules
ABCrules

5 
awk '/rules$/ { -- process for each line here -- }' file

or,

while read line
do
 found=$(echo $line | grep 'rules$')
 if [ "$found" ]; then
  # do process
 else
  echo 'no found'
 fi
done < file
6

or grep/awk/sedless:

while read line
do
 case $line in 
   *rules) echo "$line"
 esac
done < infile
7

@ Scrutinizer and @ anchal_khare

Thanks a lot, it worked with little modification. Since i don't want full line. just only the first field. so i printed the first field after filtering the entire line.