Re^3: Deleting first and last lines of a text file

[2teez]

The script given to you by morgon is a oneliner, which you should "run" from your command line interface, not from your a script.
If you want a full script of the oneliner this would do:

BEGIN { $^I = ".old"; }
LINE: while ( defined( $_ = <ARGV> ) ) {
    print $_ unless $. == 1 or eof;
}

putting the above in a script should work.

Of course, morgon code works fine from the CLI.

[vsmeruga]

Hi I should automate the task of deleting the lines in the file so that it runs every day and deletes particular file Thanks VJ

[2teez]

.. should automate the task of deleting the lines in the file ..
Then, in that case, you can specify the filename in your script, then open a filehandle to read from,doing all you wanted done. Like so:

use warnings;
use strict;

my $filename = '...';  # specify the file name here
open my $fh, '<', $filename or die "can't open $filename: $! ";
while ( defined( $_ = <$fh> ) ) {
    print $_ unless $. == 1 or eof;
}
close $fh or die "can't close $filename: $!";

[vsmeruga]

Thanks for your time. I tried with below code. but it deleted just first line. Can you please help me to delete last 2 lines as well

#!/usr/bin/perl
use strict;
use warnings;

my $file='tgtfile.txt';

open STDOUT, ">", $file or die "$0: open: $!";
open STDERR, ">&STDOUT"        or die "$0: dup: $!";

my $filename = 'srcfile_20140319.txt';  # specify the file name here
open my $fh, '<', $filename or die "can't open $filename: $! ";
while ( defined( $_ = <$fh> ) ) {
    print $_ unless $. == 1 or eof;
}
close $fh or die "can't close $filename: $!";

[vsmeruga]

But where are we specifying the filename here ?. I mean from which file first and last lines has to be deleted? Thanks VJ

[2teez]

But where are we specifying the filename here ?...
"We" are using ARGV, the special filehandle that iterates over command-line filenames in @ARGV, from the CLI.