[centos] Centos 설치 후 처리

1. 보안설정
 - 방화벽설치
 - 서비스 port 오픈

 
yum -y install firewalld

systemctl start firewalld
systemctl enable firewalld

systemctl stop firewalld

firewall-cmd --permanent --zone=public --add-port=80/tcp
firewall-cmd --permanent --zone=public --add-port=8080/tcp
 

firewall-cmd --reload

firewall-cmd --list-ports

firewall-cmd --list-services


1. setup 설치 
 yum -y install setup  setuptool  system-config-*

2. ntp 설치  
 yum -y install ntp
 
systemctl enable ntpd
systemctl restart ntpd

systemctl status  ntpd.service

systemctl is-enabled ntpd.service



2. yum 자동업데이트 
yum -y install yum-cron

systemctl enable yum-cron

systemctl restart yum-cron

  서비스 목록 확인 
  systemctl list-unit-files --type=service
  
  해당서비스의 상태확인 
  systemctl status sshd.service
  
  
  부팅시 실행되는 서비스인지 확인(ex : sshd)
  systemctl is-enabled sshd