[ 환경 ] RedHat Version 7 3대이상 EC2 Server [ EC2 보안그룹 셋팅 ] 해당 Document를 참조 : https://docs.cloudera.com/management-console/cloud/environments/topics/mc-environment-aws-security-groups.html [ 설치 ] - 관련 패키지 설치 $ sudo yum update -y && sudo yum install wget -y && sudo yum install -y ntp && sudo systemctl start ntpd && sudo systemctl enable ntpd && sudo yum install iptables-services -y $ sudo chkconfig n..