Hey everyone, I've read the man page and I've googled for about 30 minutes now and have not found an answer. I've got a file with thousands of lines like this: Oct 21 04:01:05 10.0.0.1 id=name x=value y=value time="timestamp" ... What I want to do is put a tab in front of every [a-z]{,4}. During my googling I found that \t doesn't add a tab when used on the command line so you have to create a sed script and use the tab key instead. My sed script looks like this: s/([a-z]{,4})=/ $1=/g As far as I know I am using the correct regex to solve my problem but when I run this script on my file I don't get any changes at all to the output file. I've even tried: s/([a-z])/zaq$1/g Still nothing. Can someone let me know what I'm doing wrong? Thanks, Chris. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list