Shell Programming and Scripting

It prints the whole file and adds a new line 980 if it gets that far.

Hi Era,

I think 980 line will be as it is ,

The content we entered will be 981 line

Yes, sorry for being inexact. The point I wanted to make was actually that if the file has less than 980 lines, it will do nothing.

Yes I know the difference between 2 files, but I don't know how sed works ..
is it possible that it writes to a line number 981 but the file has only 980 lines up to now.. without printing the whole file if that can be avoid it would be awesome and it doesn't have to be sed .. whatever does the trick is good for me awk, sed, cat, head whatever :P

Thank you

find here below a perl script to do what you want

print "\n Enter the line number you want to enter the data to\n";
$line = <STDIN>;
chop($line);
print "\nEnter the text to be inserted\n";
$word = <STDIN>;
chop($word);
open (OUT,">outputfile");
open (IFILE,"inputfile");
$count = 2;
while (<IFILE>) {
chop($_);
print OUT ("$_\n");
if($count == $line){
print OUT ("$word\n");
}
$count++;
}
close INFILE;
close OUT;

find here below a perl script to do what you want

print "\n Enter the line number you want to enter the data to\n";
$line = <STDIN>;
chop($line);
print "\nEnter the text to be inserted\n";
$word = <STDIN>;
chop($word);
open (OUT,">outputfile");
open (IFILE,"inputfile");
$count = 2;
while (<IFILE>) {
chop($_);
print OUT ("$_\n");
if($count == $line){
print OUT ("$word\n");
}
$count++;
}
close INFILE;
close OUT;