[RHEL] Target 관리 (과거 runlevel의 대체 모드)
1. Default Target 정보 확인
# systemctl get-default
multi-user.target
2. 설정 가능한 정보 확인
# systemctl list-units --type target
Note. 모든 정보 확인
# systemctl list-units --type target --all
3. 원하는 모드로 Target 설정 (적용을 위해 리부팅 필요)
# systemctl set-default multi-user.target
or
# ln -sf /lib/systemd/system/multi-user.target /etc/systemd/system/default.target
Note. 즉시 적용 (현재 Target 변경)
# systemctl isolate multi-user.target
# systemctl isolate graphical.target
| Runlevel | Target Units | Description |
| 0 | runlevel0.target, poweroff.target | Shut down and power off the system. - 시스템 중단(Halt) |
| 1 | runlevel1.target, rescue.target | Set up a rescue shell. - Single user mode |
| 2 | runlevel2.target, multi-user.target | Set up a non-graphical multi-user system. |
| 3 | runlevel3.target, multi-user.target | Set up a non-graphical multi-user system. - CLI mode |
| 4 | runlevel4.target, multi-user.target | Set up a non-graphical multi-user system. |
| 5 | runlevel5.target, graphical.target | Set up a graphical multi-user system. - GUI mode (X windows) |
| 6 | runlevel6.target, reboot.target | Shut down and reboot the system. - Reboot |
참고자료:
CHAPTER 15. WORKING WITH SYSTEMD TARGETS
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/working-with-systemd-targets_configuring-basic-system-settings
Systemd Target 사용
https://hippogrammer.tistory.com/75
linux systemd(systemctl) 로 run level(target) 관리하기
https://www.lesstif.com/system-admin/linux-systemd-systemctl-run-level-target-98926803.html?selectedPageVersions=1&selectedPageVersions=2