Github上看到的，对于大部分的init script可以这么用，但是其实还是不太准确

Let’s say you have a SysV Init Script named foo

Copy the file to /etc/init.d/foo

Enable the SysV service: chkconfig --add foo

Enable the SysV service: chkconfig foo on

Start the service: service foo start. After this, systemd-sysv-generator will generate this file /run/systemd/generator.late/foo.service, copy this file to /etc/systemd/system by running: cp /run/systemd/generator.late/foo.service /etc/systemd/system/foo.service

Edit /etc/systemd/system/foo.service by running systemctl edit foo.service, add in the following line to foo.servie (this makes the service installable)

[Install] WantedBy=multi-user.target 

Enable the service: systemd enable foo.service

(Optional) You can then remove the SysV script by running

 foo off && chkconfig --del foo