delete lines from a file.


 
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# 1  
Old 04-20-2004
Data delete lines from a file.

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  
Old 04-20-2004
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  
Old 04-20-2004
Try:
sed '13456d;13457d' filename > newfile
# 4  
Old 04-21-2004
It works when you put double quotes instead of single quotes.
sed "line1,line2..d" filename.
# 5  
Old 04-26-2004
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  
Old 04-26-2004
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
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