centos 7 之nmcli命令

1、nmcli命令的作用

nmcli : command‐line tool for controlling NetworkManager
    NetworkManager:动态管理和监控网络设置的守护进程。用户和脚本都可使用命令行工具 nmcli 控制 NetworkManager

2、语法

nmcli  [ OPTIONS ] OBJECT { COMMAND | help }

OPTIONS
  -t[erse]  (常用于脚本)                     terse output
  -p[retty]  (常用于用户)                    pretty output
  -m[ode] tabular|multiline                  output mode
  -f[ields] <field1,field2,...>|all|common   specify fields to output
  -e[scape] yes|no                           escape columns separators in values
  -n[ocheck]                                 don't check nmcli and NetworkManager versions
  -a[sk]                                     ask for missing parameters
  -w[ait] <seconds>                          set timeout waiting for finishing operations
  -v[ersion]                                 show program version
  -h[elp] (常用)                            print this help

OBJECT (只要不造成歧义,可简写,OBJIECT后按TAB键可以看到更多参数)
  g[eneral]       NetworkManager's general status and operations
  n[etworking]    overall networking control
  r[adio]         NetworkManager radio switches
  c[onnection]    NetworkManager's connections
  d[evice]        devices managed by NetworkManager
  a[gent]         NetworkManager secret agent or polkit agent

3、具体用法

在 nmcli 中采用命令完成功能,无论何时您不确定可用的命令选项时,都可以按 Tab 查看。

(1)显示所有网络连接

[root@linuxpao network-scripts]# nmcli -p connection show (显示结果因人而异)
==============================================================================
                      NetworkManager connection profiles
==============================================================================
NAME        UUID                                  TYPE            DEVICE     
------------------------------------------------------------------------------
team0       74a046f6-5475-486e-a33d-56cee384eca4  team            team0      
team0-eth0  9cf45811-0b16-477b-a525-14c4b2ef923e  802-3-ethernet  eth0       
team0-eth1  2d6f061a-51d7-47dc-9475-f33328d9a265  802-3-ethernet  eth1       
virbr0-nic  8b14977b-69e7-4442-8ef2-71711842618b  generic         virbr0-nic 
virbr0      5274f1f7-629b-41fa-9208-2f517b07c03f  bridge          virbr0     
eth0        e5771ae1-0195-44d4-ab6a-bdd2dfb1c8e5  802-3-ethernet  --

注意:输出结果中的 NAME 字段永远代表连接 ID(名称)。它不是接口名称(尽管看起来很像)。只要不产生歧义,nmcli命令后接的参数都可以简写的如 connection 简写成 c ,show 简写成 s 。

[root@linuxpao network-scripts]# nmcli c s (用TAB键可以看到show后接选项)
--active        eth0            id              --show-secrets  team0-eth0      uuid            virbr0-nic
apath           help            path            team0           team0-eth1 
 virbr0

(2)显示具体网络连接的状态

[root@linuxpao network-scripts]# nmcli -p connection show eth0
===============================================================================
                       Connection profile details (eth0)
===============================================================================
connection.id:                          eth0
connection.uuid:                        e5771ae1-0195-44d4-ab6a-bdd2dfb1c8e5
connection.interface-name:              eth0
connection.type:                        802-3-ethernet
connection.autoconnect:                 yes
connection.autoconnect-priority:        0
connection.timestamp:                   1473145305
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:                            auto
ipv4.dns:                               
ipv4.dns-search:                        
ipv4.addresses:                         
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:                            auto
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:                     --
-------------------------------------------------------------------------------

(3)显示所有设备状态

[root@linuxpao network-scripts]# nmcli device status 
DEVICE      TYPE      STATE      CONNECTION 
virbr0      bridge    connected  virbr0     
eth0        ethernet  connected  team0-eth0 
eth1        ethernet  connected  team0-eth1 
virbr0-nic  tap       connected  virbr0-nic 
team0       team      connected  team0      
lo          loopback  unmanaged  --

(4)创建新连接default ,IP 自动通过dhcp

[root@linuxpao network-scripts]# nmcli connection add con-name defalut type ethernet ifname eth0
Connection 'defalut' (4cff2e32-14ce-4ece-923e-515727e29c5f) successfully added.

(5)删除网络连接

[root@linuxpao network-scripts]# nmcli con del defalut 
Connection 'defalut' (4cff2e32-14ce-4ece-923e-515727e29c5f) successfully deleted.

(6)创建新连接 static ,指定静态 IP ,不自动连接

[root@linuxpao ~]# nmcli connection add  con-name static ifname eth1 type ethernet autoconnect no ip4 10.1.166.188/16 gw4 10.1.0.1
Connection 'static' (d2f2ec2f-af80-4d0e-b14a-ab0be385bfdb) successfully added.

(7)启用网络连接

[root@linuxpao ~]# nmcli connection up static (禁用即将up改为down)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/15)

[root@linuxpao ~]# ifconfig eth1
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.1.166.188  netmask 255.255.0.0  broadcast 10.1.255.255
        inet6 fe80::20c:29ff:fe0e:27d7  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:0e:27:d7  txqueuelen 1000  (Ethernet)
        RX packets 54579  bytes 5195339 (4.9 MiB)
        RX errors 0  dropped 43368  overruns 0  frame 0
        TX packets 131  bytes 17279 (16.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

(8)添加DNS

[root@linuxpao ~]# nmcli connection modify static ipv4.dns 8.8.8.8 
[root@linuxpao ~]# nmcli connection modify static +ipv4.dns 114.114.114.114(+号表示增加,-号表示减少)

(9)添加IP

[root@linuxpao network-scripts]# nmcli connection modify static +ipv4.addresses 172.25.28.10/24
[root@linuxpao network-scripts]# nmcli connection show static
......
ipv4.method:                            manual
ipv4.dns:                               8.8.8.8,114.114.114.114
ipv4.dns-search:                        
ipv4.addresses:                         10.1.166.188/16, 172.25.28.10/24
ipv4.gateway:                           10.1.0.1
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
......

(10)使修改生效

systemctl restart network 或 nmcli con reload

(11)禁用网卡,防止被自动激活

[root@linuxpao network-scripts]# nmcli device disconnect eth1 
Device 'eth1' successfully disconnected.

原创文章,作者:pao,如若转载,请注明出处:http://www.178linux.com/45146

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评论列表(1条)

  • 马哥教育
    马哥教育 2016-09-10 14:07

    文章思路清晰,结构命令,排版整洁。