On a ubuntu 18 I try to reboot a service after it start so I was try to use rc.local but this is no longer there .
So you create this file
/etc/systemd/system/rc-local.service
You add into it this
[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
Then make the file chmod +x /etc/rc.local
and add
#!/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
Final step is to enable the service
systemctl enable rc-local