− ask NetworkManager whether the network is
is a utility to find out whether we are online. It is done
by asking NetworkManager 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
NetworkManager waits for IPv4 dynamic addressing to complete
but does not wait for the auto IPv6 dynamic addressing. To
wait for IPv6 addressing to complete, either (1) change the
network connection's IPv6 may−fail setting to no,
and/or (2) change the IPv6 addressing method to manual or
dhcp, to indicate that IPv6 connectivity is expected.
| −−timeout seconds
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.
Wait for NetworkManager startup
to complete, rather than waiting for network connectivity
specifically. Startup is considered complete once
NetworkManager has activated (or attempted to activate)
every auto−activate connection which is available
given the current network state. (This is generally only
useful at boot time; after startup has completed,
nm−online −s will just return
immediately, regardless of the current network state.)
exits with status 0 if it succeeds, a value greater than 0
is returned if an error occurs.
Success – already online
or connection established within given timeout.
Offline or not online within
Unknown or unspecified