Fix WiFi problems that sometimes happen on Ubuntu.

fix-wifi

#!/bin/bash

if [[ $UID -ne 0 ]]; then
    sudo "$0"
    exit
fi

echo "Stopping network manager..."
service network-manager stop
echo "Done."
echo

echo "Killing wpa_supplicant..."
killall wpa_supplicant
echo "Done."
echo

echo "Restarting network manager application..."
nmcli nm wifi off
nmcli nm wifi on
echo "Done."
echo

echo "Purging network manager state..."
rm /var/lib/NetworkManager/NetworkManager.state
echo "Done."
echo

echo "Starting network manager..."
service network-manager start
echo "Done."