Tell the setup.sh to run the pre-install commands:
echo 1 > /root/.preinstall
Install DA without the need for a license:
echo 1 > /root/.skip_get_license
To install using insecure http://directadmin.com instead of secured https://directadmin.com, do the following:
echo 1 > /root/.insecure_download
Installation (Please Replace Your IP & Hostname)
cd /root/
curl -s https://cpanelseller.com/setup.sh > setup.sh
chmod 755 setup.sh
./setup.sh