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I'm actually working on two Slackware distributions here: my wife's, and my own. My wife's is Slackware 11; my own is Slackware 9.1. My system has an older version of sed, which doesn't even have the -i and -r switches. My wife's system has both, so I've been using hers to pursue your question.
But I don't have access to my wife's system at this point, so help me out here.
It looks as though the regular expression isn't matching. What does "man sed" on your system say about regular expressions? (Search the whole thing for "reg".)
That's pretty much what I had to do, I ended up just going 's/\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]\)/"\1"/g' although your way seems much more eligant, it only saves a few charectors. I think i must have been looking at different versons GNU does not like the \d switch for digits. Thanks for the reply guys, linuxquestions.org is good because of it.