1 給 /etc/rc.d/rc.local 可執行權限：
chmod +x /etc/rc.d/rc.local
2 開啓 rc-local.service 服務：
systemctl enable rc-local.service
systemctl start rc-local.service
3．Systemctl enable rc-loacl.service 如果不成功，就按如下修改 rc-local.service
systemctl
enable rc-local.service
The unit files have no [Install] section. They are not meant to be enabled
using systemctl.
Possible reasons for having this kind of units are:
1) A unit may be statically enabled by being symlinked from another unit's
.wants/ or .requires/ directory.
2) A unit's purpose may be to act as a helper for some other unit which has
a requirement dependency on it.
3) A unit may be started when needed via activation (socket, path, timer,
D-Bus, udev, scripted systemctl call, ...).
4．Vi /lib/system/system/rc-local.service
[Install]
WantedBy=multi-user.target
5．ln -s '/lib/systemd/system/rc-local.service' '/etc/systemd/system/multi-user.target.wants/rc-local.service'
6．systemctl enable rc-local.service
7．Systemctl start rc-local.service