Move cache dir to /var/cache/devstack
diff --git a/build_pxe_ramdisk.sh b/build_pxe_ramdisk.sh
index 51220ab..a01656b 100755
--- a/build_pxe_ramdisk.sh
+++ b/build_pxe_ramdisk.sh
@@ -7,7 +7,7 @@
 fi
 
 PROGDIR=`dirname $0`
-CHROOTCACHE=${CHROOTCACHE:-/root/cache}
+CHROOTCACHE=${CHROOTCACHE:-/var/cache/devstack}
 
 # Source params
 source ./stackrc
@@ -103,7 +103,7 @@
 
 # Configure host network for DHCP
 mkdir -p $CHROOTCACHE/natty-stack/etc/network
-cat > $$CHROOTCACHE/natty-stack/etc/network/interfaces <<EOF
+cat > $CHROOTCACHE/natty-stack/etc/network/interfaces <<EOF
 auto lo
 iface lo inet loopback