[RHEL9] enable rc.local on systemd (rhel8, rhel9)

Enable rc.local on systemd

rc.local 파일에 권한 부여

• 파일 : /etc/rc.d/rc.local
• chmod +x /etc/rc.d/rc.local

rc-local 서비스 활성화

# systemctl enable rc-local.service
The unit files have no installation config (WantedBy=, RequiredBy=, Also=,
Alias= settings in the [Install] section, and DefaultInstance= for template
units). This means they are not meant to be enabled or disabled using systemctl.

Possible reasons for having this kind of units are:
• A unit may be statically enabled by being symlinked from another unit's
.wants/ or .requires/ directory.
• A unit's purpose may be to act as a helper for some other unit which has
a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer,
D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some
instance name specified.

그냥 시도하면 위와 같은 메세지 발생

rc-local 수정

• 파일 : /lib/systemd/system/rc-local.service
• 하단에 내용 추가

[Install]
WantedBy=multi-user.target

rc-local 활성화 (재시도)

# systemctl enable rc-local
#