fixup! B-A-C: Also organized dedicated mount namespace for each host

namespace_demo/topo-B-A-C.sh

@@ -2,7 +2,7 @@
 # topo B-A-C creates the following network topology:
 #
 #
-#    netns:B          netns:A         netns:C
+#     ns:B           tns:A            ns:C
 #
 #       B  --- br0 ---  A  --- br1 ---  C
 #        b1  B1   A1  a1 a2  A2   C1  c1
@@ -72,11 +72,6 @@ xnsenter A -- mount -t tmpfs none /var/run
 xnsenter B -- mount -t tmpfs none /var/run
 xnsenter C -- mount -t tmpfs none /var/run
 
-echo
-echo
-echo
-xnsenter B -- pwd
-
 
 # open terminals in A B C for play
 xnsenter B -- xfce4-terminal --title=B &