centos7 rc.local无效

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1 给 /etc/rc.d/rc.local 可执行权限：

chmod +x /etc/rc.d/rc.local

2 开启 rc-local.service 服务：

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

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