> > If I understand correctly, you can pipe your output to: `awk '{a=$1} {if > (a > 3) print a}''. `a' is awk variable. `$1' is first column of awk > input so you probably need to change it. > > > Thank you for your message . Yes , you are right . I really need to filter out that CallId with number of occurances say less than three. But your command is not getting through on my centos . Please correct me. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100512/9a2eaddf/attachment-0005.html>