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system('/usr/local/bin/AddVirtUser' => "tpasswd=$password", => $domain, ... => 5, => '0 0 0', )
system('/usr/local/bin/AddVirtUser' => "tpasswd=$password", undef, $domain, undef, $username, undef, $fullname, undef, 5, undef, '0 0 0', undef)