ubuntu 18.04 이후 버전 /etc/rc.local 활성화

# rc.local 활성화
if [ -f /lib/systemd/system/rc-local.service ]
then
  echo "" >> /lib/systemd/system/rc-local.service
  echo "[Install]" >> /lib/systemd/system/rc-local.service
  echo "WantedBy=multi-user.target" >> /lib/systemd/system/rc-local.service
  systemctl daemon-reload
  systemctl enable rc-local.service
fi