checks for root, appends to end of file

scripts/swappiness.sh

@@ -1,8 +1,14 @@
 #!/bin/sh
-if [ $1 -n]
-then 
-	echo "Please provide a number to set swappiness value!" && exit 1
-else 
-	echo "vm.swappiness="$1
+if [ $(id -u) -ne 0 ]
+        then echo "Please run as root"
+        exit 1
+fi
+
+if [ -z "$1" ]
+then 
+	echo "Please provide a number to set swappiness value!" && exit 2
+else 
+	sudo echo "vm.swappiness="$1 >> /etc/sysctl.conf
+        sudo sysctl -p
 fi