bug fixes to default_configuration(). Resolves #174. Thanks @Austin-RR

installers/common.sh

@@ -191,15 +191,16 @@ function default_configuration() {
     # Generate required lines for Rasp AP to place into rc.local file.
     # #RASPAP is for removal script
     lines=(
-    'echo 1 > /proc/sys/net/ipv4/ip_forward #RASPAP'
+    'echo 1 > \/proc\/sys\/net\/ipv4\/ip_forward #RASPAP'
     'iptables -t nat -A POSTROUTING -j MASQUERADE #RASPAP'
+
     )
     
     for line in "${lines[@]}"; do
         if grep "$line" /etc/rc.local > /dev/null; then
             echo "$line: Line already added"
         else
-            sed -i "s/exit 0/$line\nexit0/" /etc/rc.local
+            sudo sed -i "s/^exit 0$/$line\nexit 0/" /etc/rc.local
             echo "Adding line $line"
         fi
     done