Network Manager Linux
NetworkManager is a dynamic network control and
configuration system that attempts to keep network devices and connections up
and active when they are available. NetworkManager consists of
a core daemon, a GNOME Notification Area applet that provides network status
information, and graphical configuration tools that
can create, edit and remove connections and interfaces. NetworkManager can
be used to configure the following types of connections: Ethernet, wireless, mobile
broadband (such as cellular 3G), and DSL and PPPoE (Point-to-Point over Ethernet). In
addition,NetworkManager allows for the configuration of network
aliases, static routes, DNS information and VPN connections, as well as many
connection-specific parameters. Finally, NetworkManager provides
a rich API via D-Bus which allows applications to query and control network
configuration and state.
Previous versions of Red Hat Enterprise Linux
shipped with the Network Administration Tool, which
was commonly known as system-config-network after its
command line invocation. In Red Hat Enterprise Linux 6, NetworkManager replaces
the former Network Administration Tool while providing
enhanced functionality, such as user-specific and mobile broadband
configuration. It is also possible to configure the network in Red Hat
Enterprise
Linux 6 by editing interface configuration files; refer to Chapter 4, Network
Interfaces for more information.
NetworkManager may be installed by default on Red Hat
Enterprise Linux. To ensure that it is, first run the following command as the
root user:
~]#yum install Network Manager
5.1. The
NetworkManager Daemon
The Network Manager daemon runs with root privileges and
is usually configured to start up at boot time. You can determine whether the Network Manager daemon
is running by entering this command as root:
~]# service NetworkManager
status
NetworkManager (pid 1527) is running...
The service command
will report NetworkManager is
stopped if the NetworkManager service is not
running. To start it for the current session:
~]# service NetworkManager
start
Run the chkconfig command
to ensure that NetworkManager starts up every time the system
boots:
~]#chkconfig NetworkManager on
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