As user:
$ nm-tool

NetworkManager Tool

get_nm_state(): didn't get a reply from NetworkManager.


NetworkManager appears not to be running (could not get its state).

As root:
# nm-tool

NetworkManager Tool

State: disconnected

print_devices(): didn't get a reply from NetworkManager.
There are no available network devices.

$ ps aux|grep Network
root     11689  0.0  0.1   3972  1832 ?        Ss   10:51   0:00 /usr/sbin/NetworkManager --pid-file /var/run/NetworkManager/NetworkManager.pid
root     11696  0.0  0.1   2900  1076 ?        Ss   10:51   0:00 /usr/sbin/NetworkManagerDispatcher --pid-file /var/run/NetworkManager/NetworkManagerDispatcher.pid
benq     13498  0.0  0.0   3076   688 pts/0    S+   11:30   0:00 grep Network