andersonlizardo at yahoo.com.br
Wed Dec 3 17:21:54 PST 2003
Jason Kircher wrote:
> > First of all, I strongly suggest you read some doc about "Regular
> > Expressions". It may solve many problems you may enconter while
> > to use regex-ready tools like grep and sed.
> Know of such a good document on regex?
The basics are already on sed info pages. You can read more about
regular expressions http://www.tldp.org/LDP/abs/html/regexp.html.
Someone please suggest more links here.
> That's a regex page specific to perl. Is there a more universal one?
There is a regex manual that comes with man-pages package. See "man 7
regex". It's very basic, but serves as a quick reference.
> > > Reading a little more, and I tried:
> > > sed 's/.*\(:\)\1//' sitelog
> > > That hung sed. (^C gets out, thankfully.)
> > What is that?!? :)
Okay, now I see you've used "back reference". I've never used this
feature before, so I didn't recognise it at first ;).
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