create new user for wireguar server

create_user.sh

#!bin/bash

NEW_USER=$NEW_USER_NAME
LAST_IP=$LAST_LOCAL_IP_SERVER_CONFIGURE

cd /etc/wireguard && mkdir "${NEW_USER}"

wg genkey | tee /etc/wireguard/"${NEW_USER}"/privatekey | wg pubkey | tee /etc/wireguard/"${NEW_USER}"/publickey

echo "configured keys for new user:" "${NEW_USER}"

IP="10.0.0.${LAST_IP}/32"

CLIENT_PUBLIC_KEY="$(cat /etc/wireguard/"${NEW_USER}"/publickey)"

arr=(
    ''
    "# ${NEW_USER}"
    '[Peer]'
    "PublicKey = ${CLIENT_PUBLIC_KEY}"
    "AllowedIPs = ${IP}"
);

printf '%s\n' "${arr[@]}" >> wg0.conf

echo "updated wg0.conf"

CLIENT_PRIVATE_KEY="$(cat /etc/wireguard/"${NEW_USER}"/privatekey)"
DNS='8.8.8.8'

SERVER_PUBLIC_KEY="$(cat /etc/wireguard/publickey)"
SERVER_IP=$SERVER_IP
SERVER_PORT=$SERVER_PORT

arr=(
    '[Interface]'
    "PrivateKey = ${CLIENT_PRIVATE_KEY}"
    "Address = ${IP}"
    "DNS = ${DNS}"
    ''
    '[Peer]'
    "PublicKey = ${SERVER_PUBLIC_KEY}"
    "Endpoint = ${SERVER_IP}:${SERVER_PORT}"
    'AllowedIPs = 0.0.0.0/0'
    'PersistentKeepalive = 20'
);

printf '%s\n' "${arr[@]}" >> /etc/wireguard/"${NEW_USER}/${NEW_USER}.conf"

systemctl restart wg-quick@wg0.service

echo "restarted wg0.service"

systemctl status wg-quick@wg0.service