[accessiblelinux] Re: the stream editor?
- From: Storm Dragon <stormdragon2976@xxxxxxxxx>
- To: accessiblelinux@xxxxxxxxxxxxx
- Date: Thu, 14 Oct 2010 08:29:36 -0400
Hi,
Yes sed is very powerful and can use regexps. This page is awesome, I
refer to it for almost all of my sed needs:
http://www-h.eng.cam.ac.uk/help/tpl/unix/sed.html
Funny thing is, the thing you need, double spacing is the first thing in
the list.
sed G yourfile.txt > doublespaced.txt
Note the page just shows you the sed line, you have to know how to
redirect to a file etc. if you just do:
sed G yourfile.txt
it will display the file with double spacing, not actually write the
file with the double spaces, so that's why the > and the new file name.
If you try to write it to the same file it will erase everything in the
file which is probably not a good thing lol.
HTH
Storm
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http://www.stormdragon.us/
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On Thu, 2010-10-14 at 08:04 -0400, aerospace1028@xxxxxxxxxxx wrote:
> Salutations,
> does anyone here have experience using sed, the command-line stream
> editor? Can sed use regular expressions in the replacement-string?
> I'm wading through the documentation, but I'm having trouble digesting
> it all (it's very robust, which is good once you master it, but adds
> to the initial learning curve).
>
> I can find lots of applications to search for regular expressions, but
> I still can't find anything to use regular expressions in the
> substitution field. I want to run through a text file and find every
> carriage-return (designated "$" IN MOST PROGRAMS) and substitute it
> with two carriage-returns (in openoffice, the only place I can do this
> right now, it has to be "\n\n").
>
> Before I commit myself to learning sed, I wanted to double-check it
> can do what I want it to.
>
> thank you:-)
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