[Unit]
Description=/etc/rc.local
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
新增文件：
vi /etc/rc.local
内容：
#!/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.
exit 0
添加权限：
chmod +x /etc/rc.local
设置到系统启动：
systemctl enable rc-local
启动脚本：
systemctl start rc-local.service
检查服务状态：
systemctl status rc-local.service
上面你已经成功的创建了一个系统启动脚本，接下来你就可以在/etc/rc.loacl中的exit前增加任意你想启动的脚本了，比如：
cd /home/wjf/flypig
sh run.sh