delete lines from a file.

Shell Programming and Scripting
1

I have a file which has about 500K records and I need to delete about 50 records from the file. I know line numbers and am using
sed '13456,13457,......d' filename > new file.
It does not seem to be working.
Any help will greatly appreciated.

2

how about useing perl and the TIE function load the file into an array and cycle through the file leaving out the elements you dont want in the file?

3

Try:
sed '13456d;13457d' filename > newfile

4

It works when you put double quotes instead of single quotes.
sed "line1,line2..d" filename.

5

If You know the begining line number say p and the end line number you can use the follwing:

say begining line number=16
ending line number =25
file=file

#!/bin/sh
p=16
q=25
p=` expr $q - $p`
head -$q file | tail -$p >>file1.c

6

If You know the begining line number say p and the end line number you can use the follwing:

say begining line number=16
ending line number =25
file=file

#!/bin/sh
p=16
q=25
p=` expr $q - $p`
head -$q file | tail -$p >>file1.c