nmcli命令介绍
nmcli命令集
显示所有网络连接：nmcli con show
显示活动网络连接：nmcli con show -active
显示指定网络连接的详情：nmcli con show eno16777728
显示网络设备连接状态：nmcli dev status
显示所有网络设备的详情：nmcli dev show
显示指定网络设备的详情：nmcli dev show eno16777728
启用网络连接：nmcli con up eno16777728
停用网络连接（可被自动激活）：nmcli con down eno33554960
禁用网卡，防止被自动激活：nmcli dev dis eth0
删除网络连接的配置文件：nmcli con del eno33554960
重新加载配置网络配置文件：nmcli con reload
动态获取IP方式的网络连接配置：nmcli con add con-name eno16777728 type ethernet ifname eno16777728
指定静态IP方式的网络连接配置：nmcli con add con-name eno16777728 ifname eno16777728 autoconnect yes type ethernet ip4 10.1.254.254/16 gw4 10.1.0.1
启用/关闭所有的网络连接：nmcli net on/off
禁用网络设备并防止自动激活：nmcli con dis eno33554960
查看添加网络连接配置的帮助：nmcli con add help
修改网络连接单项参数
nmcli con mod IF-NAME connection.autoconnect yes修改为自动连接
nmcli con mod IF-NAME ipv4.method manual | dhcp修改IP地址是静态还是DHCP（实际情况[auto, link-local, manual, shared, disabled]）
nmcli con mod IF-NAME ipv4.addresses “172.25.X.10/24 172.25.X.254”修改IP配置及网关
nmcli con mod IF-NAME ipv4.gateway 10.1.0.1修改默认网关
nmcli con mod IF-NAME +ipv4.addresses 10.10.10.10/16添加第二个IP地址
nmcli con mod IF-NAME ipv4.dns 114.114.114.114添加dns1
nmcli con mod IF-NAME +ipv4.dns 8.8.8.8添加dns2
nmcli con mod IF-NAME -ipv4.dns 8.8.8.8删除dns
修改配置文件执行生效：systemctl restart network 或 nmcli con reload
nmcli命令生效：nmclicon down eth0 ; nmclicon up eth0
nmcli命令修改所对应的文件条目
nmcli con mod ifcfg-* 文件
ipv4.method manual BOOTPROTO=none
ipv4.method auto BOOTPROTO=dhcp
connection.id eth0 NAME=eth0
(ipv4.addresses IPADDR0=192.0.2.1
“192.0.2.1/24 PREFIX0=24
192.0.2.254”) GATEWAY0=192.0.2.254
ipv4.dns 8.8.8.8 DNS0=8.8.8.8
pv4.dns-search example.com DOMAIN=example.com
pv4.ignore-auto-dns true PEERDNS=no
connection.autoconnect yes ONBOOT=yes
connection.interface-name eth0 DEVICE=eth0
802-3-ethernet.mac-address... HWADDR=...
图形工具：nm-connection-editor（Centos系统自带的图形模块）
网络接口配置tui工具：nmtui
部分命令示例
1、显示所有网络连接：nmcli con show
[root@centos7 ~]# nmcli con show
NAME UUID TYPE DEVICE
virbr0-nic 4435f670-b732-49eb-afb9-6cef2481e749 generic virbr0-nic
virbr0 6802b5f0-f314-4669-b0f3-f69e25bb090c bridge virbr0
Wired connection 1 d41f6dde-a78b-4bfa-a9b5-2e75cee0f5d3 802-3-ethernet eno33554960
System eno16777728 8cedbaed-b1ed-aa77-7f3c-6b5a960f4bb5 802-3-ethernet eno16777728
[root@centos7 ~]#
2、显示活动网络连接：nmcli con show -active
[root@centos7 ~]# nmcli con show -active
NAME UUID TYPE DEVICE
virbr0-nic 4435f670-b732-49eb-afb9-6cef2481e749 generic virbr0-nic
virbr0 6802b5f0-f314-4669-b0f3-f69e25bb090c bridge virbr0
Wired connection 1 d41f6dde-a78b-4bfa-a9b5-2e75cee0f5d3 802-3-ethernet eno33554960
System eno16777728 8cedbaed-b1ed-aa77-7f3c-6b5a960f4bb5 802-3-ethernet eno16777728
[root@centos7 ~]#
3、显示网络设备状态：nmcli dev status
[root@centos7 ~]# nmcli dev status
DEVICE TYPE STATE CONNECTION
virbr0 bridge connected virbr0
eno16777728 ethernet connected System eno16777728
eno33554960 ethernet connected Wired connection 1
virbr0-nic tap connected virbr0-nic
lo loopback unmanaged --
[root@centos7 ~]#
4、显示指定网络连接的详情：nmcli con show eno16777728
[root@centos7 ~]# nmcli con show eno16777728
connection.id: eno16777728
connection.uuid: 8cedbaed-b1ed-aa77-7f3c-6b5a960f4bb5
connection.interface-name: eno16777728
connection.type: 802-3-ethernet
connection.autoconnect: yes
connection.autoconnect-priority: 0
connection.timestamp: 1473150860
connection.read-only: no
connection.permissions:
connection.zone: --
connection.master: --
connection.slave-type: --
connection.autoconnect-slaves: -1 (default)
connection.secondaries:
connection.gateway-ping-timeout: 0
connection.metered: unknown
802-3-ethernet.port: --
802-3-ethernet.speed: 0
802-3-ethernet.duplex: --
802-3-ethernet.auto-negotiate: yes
802-3-ethernet.mac-address: --
802-3-ethernet.cloned-mac-address: --
802-3-ethernet.mac-address-blacklist:
802-3-ethernet.mtu: auto
802-3-ethernet.s390-subchannels:
802-3-ethernet.s390-nettype: --
802-3-ethernet.s390-options:
802-3-ethernet.wake-on-lan: 1 (default)
802-3-ethernet.wake-on-lan-password: --
ipv4.method: manual
ipv4.dns:
ipv4.dns-search:
ipv4.addresses: 10.1.254.254/16
ipv4.gateway: --
ipv4.routes:
ipv4.route-metric: -1
ipv4.ignore-auto-routes: no
ipv4.ignore-auto-dns: no
ipv4.dhcp-client-id: --
ipv4.dhcp-send-hostname: yes
ipv4.dhcp-hostname: --
ipv4.never-default: no
ipv4.may-fail: yes
ipv6.method: ignore
ipv6.dns:
ipv6.dns-search:
ipv6.addresses:
ipv6.gateway: --
ipv6.routes:
ipv6.route-metric: -1
ipv6.ignore-auto-routes: no
ipv6.ignore-auto-dns: no
ipv6.never-default: no
ipv6.may-fail: yes
ipv6.ip6-privacy: -1 (unknown)
ipv6.dhcp-send-hostname: yes
ipv6.dhcp-hostname: --
GENERAL.NAME: System eno16777728
GENERAL.UUID: 8cedbaed-b1ed-aa77-7f3c-6b5a960f4bb5
GENERAL.DEVICES: eno16777728
GENERAL.STATE: activated
GENERAL.DEFAULT: no
GENERAL.DEFAULT6: no
GENERAL.VPN: no
GENERAL.ZONE: --
GENERAL.DBUS-PATH: /org/freedesktop/NetworkManager/ActiveConnection/4
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/Settings/3
GENERAL.SPEC-OBJECT: /
GENERAL.MASTER-PATH: --
IP4.ADDRESS[1]: 10.1.254.254/16
IP4.GATEWAY:
IP6.ADDRESS[1]: fe80::20c:29ff:fe06:f987/64
IP6.GATEWAY:
[root@centos7 ~]#
5、显示指定网络设备的详情：nmcli dev show eno16777728
[root@centos7 ~]# nmcli dev show eno16777728
GENERAL.DEVICE: eno16777728
GENERAL.TYPE: ethernet
GENERAL.HWADDR: 00:0C:29:06:F9:87
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.CONNECTION: System eno16777728
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/4
WIRED-PROPERTIES.CARRIER: on
IP4.ADDRESS[1]: 10.1.254.254/16
IP4.GATEWAY:
IP6.ADDRESS[1]: fe80::20c:29ff:fe06:f987/64
IP6.GATEWAY:
[root@centos7 ~]#
6、新建网络连接配置文件
1）动态获取IP方式的网络连接配置：nmcli con add con-name eno16777728 type ethernet ifname eno16777728
[root@centos7 network-scripts]# nmcli con add con-name eno16777728 type ethernet ifname eno16777728
Connection 'eno16777728' (6ce34ffb-d80a-4247-9a40-f0c19a45defa) successfully added.
[root@centos7 network-scripts]# cat ifcfg-eno16777728
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eno16777728
UUID=6ce34ffb-d80a-4247-9a40-f0c19a45defa
DEVICE=eno16777728
ONBOOT=yes
[root@centos7 network-scripts]#
2）指定静态IP方式的网络连接配置：nmcli con add con-name eno16777728 ifname eno16777728 autoconnect yes type ethernet ip4 10.1.254.254/16 gw4 10.1.0.1
[root@centos7 network-scripts]# nmcli con add con-name eno16777728 ifname eno16777728 autoconnect yes type ethernet ip4 10.1.254.254/16 gw4 10.1.0.1
Connection 'eno16777728' (ced5dba6-af9f-446e-9de0-d425a0ebb80e) successfully added.
[root@centos7 network-scripts]# cat ifcfg-eno16777728
TYPE=Ethernet
BOOTPROTO=none
IPADDR=10.1.254.254
PREFIX=16
GATEWAY=10.1.0.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eno16777728
UUID=ced5dba6-af9f-446e-9de0-d425a0ebb80e
DEVICE=eno16777728
ONBOOT=yes
[root@centos7 network-scripts]#
7、启用网络连接：nmcli con up eno16777728
[root@centos7 network-scripts]# nmcli con up eno16777728
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
[root@centos7 network-scripts]#
8、停用网络连接:nmcli con down eno33554960
[root@centos7 network-scripts]# nmcli con down eno33554960
Connection 'eno33554960' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
