for my $apache_file ( sort { $merge_structure{ apache_log }->{ $a } cmp $merge_structure{ apache_log }->{ $b } } keys( %{ $merge_structure{ apache_log }\
 } ) ) {
        print "$apache_file\n";
    }

##</code><code>##

/var/log/httpd/thermofisherhc/access_log
/var/log/httpd/thermofisherhc/access_log.1
/var/log/httpd/thermofisherhc/access_log.3
/var/log/httpd/thermofisherhc/access_log.4
/var/log/httpd/thermofisherhc/access_log.2