chg: Added a message explaining the need for sudo

captive-portal-login.sh

@@ -0,0 +1,21 @@
+#!/bin/env bash
+
+# This script allows one to log into captive portals by temporarily using the provided DNS records. Otherwise, captive portals 
+# don't work with custom resolvconf setups
+
+# Get the DNS resolver provided by the network
+DNS=$(nmcli -f IP4.DNS dev show wlan0 | awk '{print $2}')
+
+# Temporarily put the DNS resolver in place
+echo "Need sudo permission to work with /etc/resolv.conf"
+sudo cp /etc/resolv.conf /etc/resolv.conf.bk
+echo "# Temporary resolv.conf generated by captive-portal-login.sh" | sudo tee /etc/resolv.conf
+echo "nameserver $DNS" | sudo tee -a /etc/resolv.conf
+
+echo "Put temporary DNS resolver in place. Now try opening an website, and fix the captive portal before continuing."
+
+read -p "Press enter to continue..."
+
+# Put back own resolvers
+sudo mv /etc/resolv.conf.bk /etc/resolv.conf
+