1. Oracle Linux 8 시작
A) Linux GUI 접속
B) 설치 내역 확인
cat /etc/oracle-release cat /etc/redhat-release uname -r
[root@ol8 ~]# cat /etc/oracle-release Oracle Linux Server release 8.1 [root@ol8 ~]# cat /etc/redhat-release Red Hat Enterprise Linux release 8.1 (Ootpa) [root@ol8 ~]# uname -r 4.18.0-147.el8.x86_64
C) 리눅스 설정 변경
vi /etc/hosts 로 서버 정보 추가
vi /etc/hosts
[root@ol8 ~]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 10.0.1.20 ol8
vi /etc/selinux/config 로 SELinux 설정 변경
SELINUX=permissive
SELinux 모드 permissive 로 적용
setenforce permissive
기존의 값을 주석처리하고 permissive로 대체
[root@ol8 ~]# cat /etc/selinux/config | grep SELINUX= # SELINUX= can take one of these three values: #SELINUX=enforcing SELINUX=permissive
실시간으로 적용
[root@ol8 ~]# setenforce permissive
vi /etc/fstab 로 tmpfs 재설정
tmpfs /dev/shm tmpfs size=8g 0 0
/dev/shm 영역 remount 수행
mount -o remount /dev/shm
tmpfs /dev/shm tmpfs size=8g 0 0
[root@ol8 ~]# df -h | grep shm tmpfs 4.9G 0 4.9G 0% /dev/shm [root@ol8 ~]# mount -o remount /dev/shm [root@ol8 ~]# df -h | grep shm tmpfs 8.0G 0 8.0G 0% /dev/shm
D) 사용하지 않는 서비스 끄기
### 블루투스 중지 systemctl stop bluetooth.service systemctl disable bluetooth.service ### 방화벽 중지 systemctl stop firewalld systemctl disable firewalld ### 시간 동기화 중지 systemctl stop chronyd systemctl disable chronyd ### NTP 중지 systemctl stop ntpdate systemctl disable ntpdate ### DNS 중지 systemctl stop avahi-daemon systemctl disable avahi-daemon ### 가상 시스템 관리 중지 systemctl stop libvirtd systemctl disable libvirtd.service
[root@ol8 ~]# systemctl stop bluetooth.service [root@ol8 ~]# systemctl disable bluetooth.service Removed /etc/systemd/system/dbus-org.bluez.service. Removed /etc/systemd/system/bluetooth.target.wants/bluetooth.service. [root@ol8 ~]# systemctl stop firewalld [root@ol8 ~]# systemctl disable firewalld Removed /etc/systemd/system/multi-user.target.wants/firewalld.service. Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service. [root@ol8 ~]# systemctl stop chronyd [root@ol8 ~]# systemctl disable chronyd [root@ol8 ~]# systemctl stop ntpdate Failed to stop ntpdate.service: Unit ntpdate.service not loaded. [root@ol8 ~]# systemctl disable ntpdate Failed to disable unit: Unit file ntpdate.service does not exist. [root@ol8 ~]# systemctl stop avahi-daemon Warning: Stopping avahi-daemon.service, but it can still be activated by: avahi-daemon.socket [root@ol8 ~]# systemctl disable avahi-daemon Removed /etc/systemd/system/multi-user.target.wants/avahi-daemon.service. Removed /etc/systemd/system/sockets.target.wants/avahi-daemon.socket. Removed /etc/systemd/system/dbus-org.freedesktop.Avahi.service. [root@ol8 ~]# systemctl stop libvirtd [root@ol8 ~]# systemctl disable libvirtd.service Removed /etc/systemd/system/multi-user.target.wants/libvirtd.service. Removed /etc/systemd/system/sockets.target.wants/virtlogd.socket. Removed /etc/systemd/system/sockets.target.wants/virtlockd.socket.
{}
