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how to grep a subdomain

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Top Forums Shell Programming and Scripting how to grep a subdomain
# 8  
Old 07-24-2009
is it possible by using "sed" ?
# 9  
Old 07-24-2009
This is the way regular expressions work. If you would explain why this is a problem you might get better results.
# 10  
Old 07-24-2009
Ok.. I am almost near to my result. I decided to replace the whole dots in the file with \. and then search for the duplicates. Could you please tell me how to replace each . with \. in a file ?
# 11  
Old 07-24-2009
I think you're misunderstanding. You don't need to modify the input file with the escaped dots (\.), just search for domains using the search term with escapes.

My pseudo code:

grep zone input_file | awk '{print $2}' | uniq (or pretty close to that)
for domain in "domain list from grep output"
  sed to replace . with \. in $domain
  grep -c escaped_domain from input file to get count
  if count > 1
    echo $domain is not unique, fix file

# 12  
Old 07-24-2009
Thank you for your help peterro. I've finished my script Smilie
# 13  
Old 07-24-2009
You can avoid regular expressions by using fgrep instead of grep.
Try this:
fgrep '' /etc/named.conf

This willmake your script simpler.
# 14  
Old 07-24-2009
Originally Posted by edidataguy
You can avoid regular expressions by using fgrep instead of grep.
Try this:
fgrep '' /etc/named.conf

This willmake your script simpler.

WOW.. thats Cool.... Thank you edidataguy

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