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linux 7 nmcli modify,网络配置之-nmcli

使用nmcli配置网络

NetworkManager是管理和监控网络设置的守护进程,设备既就是网络接口,连接是对网络接口的配置,一个网络接口可以有多个连接配置,但同时只有一个连接配置生效。

1 使用nmcli配置主机名

CentOS6 之前主机配置文件:/etc/sysconfig/network

CentOS7主机名配置文件:/etc/hostname,默认没有这个文件,通过DNS反向解析获取主机名,主机名默认为:localhost.localdomain

显示主机名信息

hostname

hostnamectl status

创建并修改文件并生效

hostnamectl set-hostname deskX.example.com

[[email protected] ~]# hostnamectl set-hostname centos7.3.com

[[email protected] ~]# hostname

centos7.3.com

[[email protected] ~]# cat /etc/hostname

centos7.3.com

可以看到已经修改成功。

删除文件。回复默认主机名localhost.localdomain

2 常用命令

nmcli connection show 显示所有连接

nmcli connection show –active    显示所有活动的连接状态

nmcli connection show “ens33”    显示网络连接配置

nmcli device status            显示设备状态

nmcli device show ens33        显示网络接口属性

nmcli connection add help        查看帮助

nmcli connection reload        重新加载配置

nmcli connection down test2        禁用test2的配置,注意一个网卡可以有多个配置。

nmcli connection up test2        启用test2的配置

nmcli device disconnect ens33    禁用ens33网卡,物理网卡

nmcli device disconnect ens33    启用ens33网卡

图形工具

nm-connection-editor

字符工具

nmtui

nmtui-connect

nmtui-edit

nmtui-hostname

3 创建新连接配置

(1)创建新连接配置default,IP通过DHCP自动获取

[[email protected] ~]# nmcli connection add con-name default type Ethernet ifname eth0

Connection 'default' (d62f98af-86ed-4735-80aa-2d80351765b2) successfully added.

删除连接

[[email protected] ~]# nmcli connection delete default

Connection 'default' (d62f98af-86ed-4735-80aa-2d80351765b2) successfully deleted.

(2)创建新的连接配置test2,指定静态IP,不自动连接

[[email protected] ~]# nmcli connection add con-name test2 ipv4.method manual ifname ens33 autoconnect no type Ethernet ipv4.addresses 172.25.100.100/24 gw4 172.25.100.1

Connection 'test2' (98385bf5-8cc3-47e3-a5f2-51e2d736be6d) successfully added.

参数说明:

con-name 指定连接名字,没有特殊要求,

ipv4.methmod 指定获取IP地址的方式

ifname 指定网卡设被名,既就是次配置所生效的网卡

autoconnect 指定是否自动启动

ipv4.addresses 指定IPv4地址

gw4指定网关

4查看/etc/sysconfig/network-scripts/目录

会看到多出一个文件ifcfg-test2。说明添加确实生效了。

/etc/sysconfig/network-scripts/ifcfg-test2

[[email protected] ~]# ls /etc/sysconfig/network-scripts/ifcfg-*

/etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-lo

/etc/sysconfig/network-scripts/ifcfg-ens34 /etc/sysconfig/network-scripts/ifcfg-test2

5 启用test2连接配置

[[email protected] ~]# nmcli connection up test2

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)

[[email protected] ~]# systemctl restart network

看下是否生效

[[email protected] ~]# nmcli device show ens33

GENERAL.DEVICE: ens33

GENERAL.TYPE: ethernet

GENERAL.HWADDR: 00:0C:29:3A:00:82

GENERAL.MTU: 1500

GENERAL.STATE: 100 (connected)

GENERAL.CONNECTION: test2

GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/7

WIRED-PROPERTIES.CARRIER: on

IP4.ADDRESS[1]: 172.25.100.100/24

IP4.GATEWAY: 172.25.100.1

IP6.ADDRESS[1]: fe80::5a5b:2cc3:a448:e2e1/64

IP6.GATEWAY:

好了,基本的IP地址配置成功

6 修改连接设置

(1)修改test2为自动启动

[[email protected] ~]# nmcli connection modify test2 connection.autoconnect yes

(2)修改DNS为172.25.1.1

[[email protected] ~]# nmcli connection modify test2 ipv4.dns 172.25.1.1

(3)添加DNS 114.114.114.114

[[email protected] ~]# nmcli connection modify test2 +ipv4.dns 114.114.114.114

看下是否成功

[[email protected] ~]# cat /etc/sysconfig/network-scripts/ifcfg-test2

TYPE=Ethernet

[……]

NAME=test2

UUID=98385bf5-8cc3-47e3-a5f2-51e2d736be6d

DEVICE=ens33

ONBOOT=yes

DNS1=172.25.1.1

IPADDR=172.25.100.100

PREFIX=24

GATEWAY=172.25.100.1

DNS2=114.114.114.114

可以看到均已生效

(4)删除DNS

[[email protected] ~]# nmcli connection modify test2 -ipv4.dns 114.114.114.114

(5)修改IP地址

[[email protected] ~]# nmcli connection modify test2 ipv4.addresses 200.100.100.100/24 gw4 200.100.100.1

(6)还可以添加多个IP

[[email protected] ~]# nmcli connection modify test2 +ipv4.addresses 10.10.10.10/8

7 nmcli 命令和/etc/sysconfig/network-scripts/ifcfg-*文件的对应关系

ipv4.method manual                          BOOTPROTO=none

ipv4.method auto                                 BOOTPROTO=dhcp

ipv4.addresses “192.0.2.1/24           IPADDR0=192.0.2.1

192.0.2.254″                                         PREFIX0=24

GATEWAY0=192.0.2.254

ipv4.dns 8.8.8.8                                     DNS0=8.8.8.8

ipv4.dns-search example.com            DOMAIN=example.com

ipv4.ignore-auto-dns true                     PEERDNS=no

connection.autoconnect yes                ONBOOT=yes

connection.id eth0                                   NAME=eth0

connection.interface-name eth0          DEVICE=eth0

802-3-ethernet.mac-address . . .          HWADDR= . . .

原创文章,作者:linux is not unix,如若转载,请注明出处:http://www.178linux.com/74907