There are multiple system managers which can by possibly running on your Linux system. The current most common system managers are SysV (init), Systemd and Upstart. You may find this short guide to be of use to you, if you are unsure which, system manager is running on your Linux system.
Privileged access to your Linux system is required.
In some cases, it is necessary to disable Docker's IPtables rules to avoid overwriting any existing firewall rules. The following article describes a simple to follow procedure on how to disable disable Docker's IPtables rules on Systemd Linux systems.
Privileged access to your Systemd Linux is required.