Update & Upgrade First Your VPS for Debian 10 & 11

apt-get update && apt-get upgrade -y && update-grub && sleep 2 && reboot

Update & Upgrade First Your VPS for Ubuntu 18.04 & 20.04

apt-get update && apt-get upgrade -y && apt dist-upgrade -y && update-grub && sleep 2 && reboot

INSTALLATION SCRIPT

sysctl -w net.ipv6.conf.all.disable_ipv6=1 && sysctl -w net.ipv6.conf.default.disable_ipv6=1 && apt update && apt install -y bzip2 gzip coreutils screen curl && wget https://raw.githubusercontent.com/mztechone/multiport/main/setup.sh && chmod +x setup.sh && sed -i -e 's/\r$//' setup.sh && screen -S setup ./setup.sh

Copy & paste 👇👇 to your VPS if ERROR (WG ONLY)

Wireguard

echo "deb http://deb.debian.org/debian/ unstable main" >/etc/apt/sources.list.d/unstable.list
printf 'Package: *\nPin: release a=unstable\nPin-Priority: 90\n' >/etc/apt/preferences.d/limit-unstable
apt update
apt install -y wireguard-tools iptables iptables-persistent
apt install -y linux-headers-$(uname -r)

systemctl restart wg-quick@wg0