以下命令需要root用户权限.

新版本的Ubuntu和debian已经默认停用了原有的rc.local开启启动的功能,可能是出于安全或者相关的原因,但并没有完全移除这个功能,我们只要做点小改动就可以重新启用这个功能,因为它确实太有用了.

新系统并不是没有替代方案,但是显得繁琐,用惯了rc.local的人无法适应.

现在我们来重新启用它,回到我们熟悉的状态.

1.我们看新版rc-local.service是什么状况:

cat /lib/systemd/system/rc-local.service

显示的结果如下:

# SPDX-License-Identifier: LGPL-2.1+ # # This file is part of systemd. # 
# systemd is free software; you can redistribute it and/or modify it 
# under the terms of the GNU Lesser General Public License as published by 
# the Free Software Foundation; either version 2.1 of the License, or 
# (at your option) any later version. 
# This unit gets pulled automatically into multi-user.target by 
# systemd-rc-local-generator if /etc/rc.local is executable. 

[Unit] 
Description=/etc/rc.local Compatibility 
Documentation=man:systemd-rc-local-generator(8) 
ConditionFileIsExecutable=/etc/rc.local 
After=network.target 

[Service] 
Type=forking 
ExecStart=/etc/rc.local start 
TimeoutSec=0 
RemainAfterExit=yes 
GuessMainPID=no

我们在以上文本末尾添加几行:

 vi /lib/systemd/system/rc-local.service

# added by yourself 
[Install] 
WantedBy=multi-user.target 
Alias=rc-local.service

保存退出

:wq!

2. 打开 /etc/rc.local 输入：

vi /etc/rc.local

在这个文档里你可以配置开机启动的命令或者脚本,就和以前的版本一样,作者是用来开机启动生效iptables规则:

#!/bin/sh
    iptables-restore < /etc/iptables.up.rules
exit 0

保存退出:

:wq!

配置权限:

chmod 755 /etc/rc.local

3. 配置rc.local服务开机启动:

systemctl enable rc.local

systemctl start rc.local

systemctl status rc-local.service

4. 重启

reboot