lyadmin/perl-script/user_cleanup.pl

#!/usr/bin/perl

use warnings;
use strict;

my $fn;
my $cmd_out;

my $dn;
my @hd;

$dn = "/home/";
    
opendir MYDIR, $dn or die "could not open $dn";
@hd = readdir MYDIR;
closedir MYDIR;

@hd = grep {!($_ =~ /^\..*$/)} @hd;

$fn = "/tilde/lyadmin/user_list.txt";

open FILE, "<", $fn or die "could not open $fn";

while(<FILE>){
    chomp;

    unless(exists( {map { $_ => 1} @hd}->{$_})){
	printf("Deleting user %s\n", $_);
	`userdel $_`;
    }
}
close FILE