How to uninstall or remove iptables-persistent software package from Ubuntu 16.04 LTS (Xenial Xerus)

You can uninstall or removes an installed iptables-persistent package itself from Ubuntu 16.04 LTS (Xenial Xerus) through the terminal,

$ sudo apt-get remove iptables-persistent

Uninstall iptables-persistent including dependent package

If you would like to remove iptables-persistent and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove iptables-persistent

Use Purging iptables-persistent

If you use with purge options to iptables-persistent package all the configuration and dependent packages will be removed.

$ sudo apt-get purge iptables-persistent

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove iptables-persistent