八.Ubutu18.04系统添加开机自启动脚本

参考文章：https://www.cnblogs.com/airdot/p/9688530.html
RedHat系列以及Ubuntu14可以通过编辑rc.local来设置开机启动脚本，Ubutu18.04就需要添加开机自启动的服务来恢复rc.local的功能。
1、建立rc-local.service文件,添加如下内容：

sudo vi /etc/systemd/system/rc-local.service
###########################################################
[Unit]
Description=/etc/rc.local Compatibility
ConditionPathExists=/etc/rc.local
 
[Service]
Type=forking
ExecStart=/etc/rc.local start
TimeoutSec=0
StandardOutput=tty
RemainAfterExit=yes
SysVStartPriority=99
 
[Install]
WantedBy=multi-user.target
############################################################

2.创建rc.local文件并添加如下内容：

sudo vi /etc/rc.local
############################################################
#!/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 nothing.
echo "111111111111" > /usr/local/test.log
exit 0
############################################################

3.给rc.local加上执行权限

sudo chmod +x /etc/rc.local

4.启动服务并添加开机自启动以及查看服务状态

sudo systemctl enable rc-local
sudo systemctl start rc-local.service
sudo systemctl status rc-local.service
############################################################
● rc-local.service - /etc/rc.local Compatibility
   Loaded: loaded (/etc/systemd/system/rc-local.service; enabled; vendor preset: enabled)
  Drop-In: /lib/systemd/system/rc-local.service.d
           └─debian.conf
   Active: active (exited) since Sat 2019-06-22 18:13:55 CST; 11s ago
  Process: 2907 ExecStart=/etc/rc.local start (code=exited, status=0/SUCCESS)

6月 22 18:13:55 turingvideo-virtual-machine systemd[1]: Starting /etc/rc.local Compatibility...
6月 22 18:13:55 turingvideo-virtual-machine systemd[1]: Started /etc/rc.local Compatibility.

############################################################

5.重启系统后检查test.log文件确认开机是否加载启动脚本

cat /usr/local/test.log