Вы можете запустить для запуска эмуляции.
Пример:
$ sudo mn --version
2.2.1
$ sudo mn
[sudo] password for user:
*** No default OpenFlow controller found for default switch!
*** Falling back to OVS Bridge
*** Creating network
*** Adding controller
*** Adding hosts:
h1 h2
*** Adding switches:
s1
*** Adding links:
(h1, s1) (h2, s1)
*** Configuring hosts
h1 h2
*** Starting controller
*** Starting 1 switches
s1 ...
*** Starting CLI:
mininet>
*** Stopping 0 controllers
*** Stopping 2 links
..
*** Stopping 1 switches
s1
*** Stopping 2 hosts
h1 h2
*** Done
completed in 2.173 seconds
Альтернатива, попробовать: which mn
$ which mn
/usr/bin/mn