CODEWITHSUNDEEP
vimvi
Rpj
Rpj

Reputation: 6100

How do I open just a subset of very large file using vi

How do I open just a subset of very large file using vi

  1. Open last 10000 lines using vi
  2. Open 10000, 20000 lines using vi

Upvotes: 2

Views: 1255

Answers (2)

JJoao
JJoao

Reputation: 5347

In complement, I wrote a small script to edit/view a file slice (vimslice).

#!/usr/bin/perl -s

my $file=shift or die("Error:
 usage: $0 [-n] file startline [endline]
   -n      don't save changes in file.out\n");

my $sl = shift || 1;
my $el = shift || ($sl+1000);

system("sed -n -e '$sl,$el p' $file > $file.$$");
system("vi $file.$$");

if(not $n){
  system(qq{awk '(NR==$el)          {system("cat $file.$$")}
                  NR==$sl,NR==($el) {next}
                                    {print}' $file> $file.out});}

After chmod and install it do

vimslice bigfile 10000 20000      
     ...  edit the slice, replace and save in "bigfile.out" 
vimslice -n bigfile 10000 20000        
     ...  just view the slice
vimslice bigfile 10000
     ... the same as vimslice bigfile 10000 10000+1000

Upvotes: 1

romainl
romainl

Reputation: 196566

I would not use Vim, here, because of performance issues. A pager would be better fit for the job.

  1. Open last 10000 lines

    $ tail -n 10000 filename | less

  2. Open 10000, 20000 lines

    $ sed -n 10000,20000p filename | less

Anyway, you can replace less with vim - if you really want Vim.

Upvotes: 4

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