directadmin pre-install:

yum install wget screen gcc gcc-c++ flex bison make bind bind-libs bind-utils openssl openssl-devel perl quota libaio libcom_err-devel libcurl-devel gd zlib-devel libcap-devel  bzip2 db4-devel cyrus-sasl-devel perl-ExtUtils-Embed autoconf automake libtool

run screen and install:

screen

wget http://www.directadmin.com/setup.sh && chmod 755 setup.sh

begin directadmin installation: ./setup.sh