rc.local

=== /etc/systemd/system/rc-local.service
[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
 
=== /etc.rc.local
#!/bin/bash
exit 0
 
chmod +x /etc/rc.local
systemctl enable --now rc-local