-for i in dns_rfc2136_server dns_rfc2136_port dns_rfc2136_name dns_rfc2136_secret dns_rfc2136_algorithm; do echo "$i = ${!i}" >> /rfc2136.ini; done
-umask 0077
-for i in dns_rfc2136_server dns_rfc2136_port dns_rfc2136_name dns_rfc2136_secret dns_rfc2136_algorithm; do echo "$i = ${!i}" | tee -a /rfc2136.ini; done