Is pivpn safe on Raspberry Pi?

That being said ... PiVPN should be, bar none, the simplest and fastest way to Install and set up an extremely secure OpenVPN or Wireguard server on your raspberry pi. You won't need a guide or tutorial as PiVPN will do it all for you in a fraction of the time with hardened security settings in place by default.

How do I remove pivpn from my Pi?

If at any point you wish to remove PiVPN from your Pi and revert it to a pre-installation state, such as if you want to undo a failed installation to try again or you want to remove PiVPN without installing a fresh Raspbian image, just run pivpn uninstall.

Does pivpn work with Ubuntu?

Running a VPN on a server elsewhere means you can connect to the VPN from home, and because your traffic will be getting out from the cloud/VPS provider, your ISP will only see encrypted traffic. PiVPN should also work with most Ubuntu and Debian based distributions, including those using UFW by default instead of raw iptables.