Troubleshooting rc.local for Ubuntu 17

Where is ubuntu rc.local? I found it blank.

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Since Ubuntu 17 rc.local is not complete so we'll need to make it working manually

#nano /etc/rc.local 
type these lines manually or just copy paste
#!/bin/sh
place your code here
place your code here
place your code here
place your code here
place your code here
exit 0
#chmod +x /etc/rc.local