CentOS 7.0 - man page for nm-online (centos section 1)
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nm-online - ask NetworkManager whether the network is connected
nm-online [ OPTIONS ]
nm-online is a utility to find out whether we are online. It is done by asking NetworkMan-
ager about its status. When run, nm-online waits until NetworkManager reports an active
connection, or specified timeout expires. On exit, the returned status code should be
checked (see the return codes bellow).
-t, --timeout <timeout_value>
Time to wait for a connection, in seconds. If the option is not provided, the
default timeout is 30 seconds.
Exit immediately if NetworkManager is not running or connecting.
Don't print anything.
0 Success - already online or connection established within given timeout
1 Offline or not online within given timeout
2 Unspecified error
11 July 2013 NM-ONLINE(1)
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