Are you using Net::FTP?
Because that its documentation says that $ftp->ls($dir) returns a directory listing.
Assuming that to be the case, then something like this should work. 
use strict;
use warnings;

my @files_to_check = ( 'abc.txt', 'xyz.txt', 'efg.txt' );      # list 
+of files to check

my @directory_listing = $ftp->ls($dir);

my %files_on_FTP_server;

foreach my $file (@directory_listing)
{
    # extra processing here?
    $files_on_FTP_server{$file} = 1;
}

foreach my $file (@files_to_check)
{
    if ( ! $files_on_FTP_server{$file} ) { print "File $file is missin
+g\n"; }
}

[download]
However, as I do not know the format of @directory_listing, you might need some extra processing where indicated on line 12.
If @directory_listing contains a line of info for each file, you'd need a regexp to extract the file from each line, and you'd change line 10 from
foreach my $file (@directory_listing) to:
foreach my $line (@directory_listing)


UPDATE: s/Net::FTP/Net::FTP/ (ie linkified it)
s/that/its documentation/

In reply to Re^3: Script to check for multiple files on FTP and print the one missing by zork42
in thread Script to check for multiple files on FTP and print the one missing by perlvroom

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