Cleaned up sysctl and rlimit test and set

Use files instead of sysctl to set limits

util/install.sh

@@ -144,14 +144,15 @@ function mn_deps {
         python-setuptools cgroup-bin ethtool help2man \
         pyflakes pylint pep8
 
-    # Add sysctl parameters as noted in the INSTALL file to increase kernel
-    # limits to support larger setups:
-    if ! grep Mininet /etc/sysctl.conf; then
-        echo "Adding Mininet sysctl settings"
-        sudo su -c "cat $MININET_DIR/mininet/util/sysctl_addon >> /etc/sysctl.conf"
-    fi
-    # Load new sysctl settings:
-    sudo sysctl -p
+    # TODO: remove this; it's  no longer necessary as these are check when mn starts
+    ## Add sysctl parameters as noted in the INSTALL file to increase kernel
+    ## limits to support larger setups:
+    #if ! grep Mininet /etc/sysctl.conf; then
+    #    echo "Adding Mininet sysctl settings"
+    #    sudo su -c "cat $MININET_DIR/mininet/util/sysctl_addon >> /etc/sysctl.conf"
+    #fi
+    ## Load new sysctl settings:
+    #sudo sysctl -p
 
     echo "Installing Mininet core"
     pushd $MININET_DIR/mininet