RHCE7 Learning Notes 9--Management System Network

1, the basic concept of the network

Ip/mask/gateway/dns

Network devices (device) and network connection (connection) relationships:

Network equipment is a physical concept, and the network connection is a logical concept, add a physical network card device, you have to add a connection to the network card to work, the name and network connection name can be different;

[[email protected] network-scripts]# nmcli connection NAME UUID TYPE DEVICE Ens33 bccbb325-a79e-4ab1-b928-be7b79029771 802-3-ethernet ens33 ens37 39abe0c3-66cd-45d0-a3c8-66ffdaa09a4d 802-3-eth Ernet ENS37

2, through the graphical Interface Management System network

Use the Setup command to graphically configure the network in RHEL6, and use Nm-connector-editor or Nmtui to edit the network in RHEL7

Nm-connector-editor Graphical Interface:

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Nmtui Graphical Configuration Interface:

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The network connection configuration file is placed under the directory:

[Email protected] ~]# cd/etc/sysconfig/network-scripts/

Second, the command line configuration network

To view all network connections:

[[email protected] network-scripts]# nmcli connection NAME UUID TYPE DEVICE Ens33 bccbb325-a79e-4ab1-b928-be7b79029771 802-3-ethernet ens33 ens37 39abe0c3-66cd-45d0-a3c8-66ffdaa09a4d 802-3-eth Ernet ENS37

Add--active option to view the currently active connection

To view a device's connection:

[Email protected] ~]# NMCLI Device status device TYPE state CONNECTION Ens33 Ethernet Connected Ens33 ENS37 Ethernet Connected ens37 lo Loopback unmanaged--

You can use the up or down option to disconnect or turn on the connection

[Email protected] ~]# NMCLI connection Up|^cwn Ens33

To view detailed parameters for a connection:

[[email protected] ~]# nmcli connection show ens33connection.id:                            ens33connection.uuid:                          bccbb325-a79e-4ab1-b928-be7b79029771connection.interface-name:               --connection.type:                         802-3- ethernetconnection.autoconnect:                  yesconnection.timestamp:                    1420706040connection.read-only:                    no

Modify each of the properties of the connection through modify:

[Email protected] ~]# NMCLI connection Modify Ens33 connection.id "Eth1"

To add a network connection for the NIC:

[Email protected] ~]# nmcli connection add con-name my-office ifname ENS33 type Ethernet

Command line configuration network IP is static, you need to configure IP first;

[Email protected] ~]# NMCLI connection Modify Ens33 ipv4.addresses "192.168.10.10/24 192.168.1.1"

To add multiple IP addresses for a network connection:

NMCLI Connection Modify Ens33 +ipv4.addresses "192.168.10.20/24 192.168.10.1"

To reduce the IP address for a network connection:

NMCLI Connection Modify ens33-ipv4.addresses "192.168.10.20/24 192.168.10.1"

This article is from the "Ordinary Road" blog, please be sure to keep this source http://linjohn.blog.51cto.com/1026193/1600794

RHCE7 Learning Notes 9--Management System Network