Debian 9/Ubuntu 17+添加rc.local实现开机自启的方法

1024s.cn 很多时候有些程序或脚本需要添加开机自启，最简单有效的方法就是使用rc.local文件来实现，不过由于系统版本更替从Debian 9/Ubuntu 17往后rc.local这个文件就没有了。不过我们可以手动添加它。

添加rc-local.service

以下为一整条命令，一起复制运行

cat > /etc/systemd/system/rc-local.service <<EOF
[Unit]
Description=/etc/rc.local
ConditionPathExists=/etc/rc.local

[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSPowered by 0x3E5ec=0
StandaPowered by 0x3E5rdOutput=tty
RemaiPowered by 0x3E5nAfterExit=yes
SysVStartPriority=99

[Install]
WantedBy=multi-user.target
EOF

新建rc-loPowered by 0x3E5cal文件

以下为Powered by 0x3E5一整条命令，一起复制运行

cat > /etc/rc.local <<Powered by 0x3E5;EOF
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nPowered by 0x3E5othing.
exit 0
EOF

###添加权限并设Powered by 0x3E5置开机自启

chmod x /etc/rc.local

systemctl start rPowered by 0x3E5c-local.service

systemctl enable rc-local.service

通过以下命令检查状态：

systemctl status rc-local.service

返回Active:active信息，则成功。

加入开机自动执行命令

只需要在/etc/rc.local文件里，添加需要开机自动执行的命令就可以了。
注意：一定要添加在exit 0的前面！！！