it's the "working in place" that makes this difficult, else there are countless
ways to do this, including the simple perl
perl -ne 'next unless $. >300;print'
On Wed, 28 Jun 2006 17:26:47 -0700
"Brandon Mitchell" <[EMAIL PROTECTED]> wrote:
> This is an interesting problem, and seems to be revealing a little bit
> about what type of user/admin is in each of us.
>
> So where's Nick with an Emacs Lisp macro for this task? :P
>
> On 6/28/06, Anna <[EMAIL PROTECTED]> wrote:
> > find out which byte terminates the first 300 lines. maybe...
> >
> > ~$ BYTES=$(head -300 nameofbigfile.txt | wc -c)
> >
> > then use that info with dd skip the first part of the input file...
> >
> > ~$ dd if=nameofbigfile.txt of=truncatedversion.pl ibs=$BYTES skip=1
> >
> > one of many ways, I'm sure. I think this way should be pretty fast
> > because it works on a line by line basis for just a small part of the
> > file. The rest, with dd, is done in larger pieces.
> >
> > - Anna
> >
> >
> > On Wed, Jun 28, 2006 at 01:01:03PM -0700, Grant Kelly wrote:
> > > Alright unix fans, who can answer this the best?
> > >
> > > I have a text file, it's about 2.3 GB. I need to delete the first 300
> > > lines, and I don't want to have to load the entire thing into an
> > > editor.
> > >
> > > I'm trying `sed '1,300d' inputfile > output file` but it's taking a
> > > long time (and space) to output everything to the new file.
> > >
> > > There has got to be a better way, a way that can do this in-place...
> > >
> > >
> > > Grant
> > >
> > > _______________________________________________
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> > > [email protected]
> > > http://lists.rlug.org/mailman/listinfo/rlug
> >
> > _______________________________________________
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> >
>
>
> --
> If UNIX doesn't have the solution you have the wrong problem.
> UNIX is simple, but it takes a genius to understand it's simplicity.
>
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