Add header

wireguard-install.sh

@@ -199,10 +199,28 @@ EOF
 	chmod 600 "$export_dir$client".conf
 }
 
+show_header() {
+cat <<'EOF'
+
+WireGuard Script  3 Oct 2022
+https://github.com/hwdsl2/wireguard-install
+EOF
+}
+
+show_header2() {
+cat <<'EOF'
+
+Copyright (c) 2022 Lin Song
+Copyright (c) 2020-2022 Nyr
+EOF
+}
+
 show_usage() {
 	if [ -n "$1" ]; then
 		echo "Error: $1" >&2
 	fi
+	show_header
+	show_header2
 cat 1>&2 <<EOF
 
 Usage: bash $0 [options]
@@ -322,11 +340,13 @@ if [[ ! -e /etc/wireguard/wg0.conf ]]; then
 	fi
 	if [ "$auto" = 0 ]; then
 		echo
-		echo 'Welcome to this WireGuard VPN server installer!'
+		echo 'Welcome to this WireGuard server installer!'
+		echo 'GitHub: https://github.com/hwdsl2/wireguard-install'
 		echo
 		echo 'I need to ask you a few questions before starting setup.'
 		echo 'You can use the default options and just press enter if you are OK with them.'
 	else
+		show_header
 		echo
 		echo 'Starting WireGuard setup using default options.'
 	fi
@@ -644,6 +664,7 @@ WantedBy=multi-user.target" >> /etc/systemd/system/wg-iptables.service
 	echo "The client configuration is available in: $export_dir$client.conf"
 	echo "New clients can be added by running this script again."
 else
+	show_header
 	echo
 	echo "WireGuard is already installed."
 	echo