Date: Wed, 18 Dec 2002 19:30:23 +0100 From: Roman Neuhauser <neuhauser@bellavista.cz> To: questions@FreeBSD.ORG Subject: Re: is there a delete/backspace command on Freebsd ? Message-ID: <20021218183022.GJ45336@freepuppy.bellavista.cz> In-Reply-To: <20021218134137.GA74300@happy-idiot-talk.infracaninophi> References: <007101c2a688$ccc06880$dc96eed5@ymmaslak> <20021218134137.GA74300@happy-idiot-talk.infracaninophi>
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# m.seaman@infracaninophile.co.uk / 2002-12-18 13:41:37 +0000:
> On Wed, Dec 18, 2002 at 01:29:59PM +0200, Malik Bülent wrote:
>
> > I have a file.
> > How can I backspace 5 character that start with expressions(the expression
> > starts /aaa) in a file ?
> > for example my file;
> > " /aaa/yy/
> > /aaa/..
> > "
>
> If you mean "how can I delete each instance of 5 characters starting
> with /aaa from a file", then something like this should do it:
>
> perl -pi.bak -e 's:/aaa.::g;' filename
>
> which deletes the /aaa and the following (fifth) character. If you
> mean to delete the 5 characters immediately *following* /aaa then:
>
> perl -pi.bak -e 's:(?<=/aaa).{5}::g' filename
sed -i.bak 's:/aaa.::g' filename
sed -Ei.bak 's:(/aaa).{5}:\\1:g' filename
would probably be quite faster (neither tested)
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