Added simple example of using API just to create a namespace.

examples/baresshd.py

+#!/usr/bin/python
+
+"This example doesn't use OpenFlow, but attempts to run sshd in a namespace."
+
+from mininet.node import Host
+
+print "*** Creating nodes"
+h1 = Host( 'h1' )
+root = Host( 'root', inNamespace=False )
+
+print "*** Creating links"
+h1.linkTo( root )
+
+print "*** Configuring nodes"
+h1.setIP( h1.intfs[ 0 ], '10.0.0.1', 8 )
+root.setIP( root.intfs[ 0 ], '10.0.0.2', 8 )
+
+print "*** Creating banner file"
+f = open( '/tmp/%s.banner' % h1.name, 'w' )
+f.write( 'Welcome to %s at %s\n' % ( h1.name, h1.IP() ) )
+f.close()
+
+print "*** Running sshd"
+h1.cmd( '/usr/sbin/sshd -o "Banner /tmp/%s.banner"' % h1.name )
+
+print "*** You may now ssh into", h1.name, "at", h1.IP()