Linux网络管理命令-nmcli

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[v_act]格式：nmcli [OPTIONS…] {connection | device} [COMMAND] [ARGUMENTS…]
        device – 显示和管理网络接口；可简写成“dev”
            status：查看网路接口状态
            show interface：查看指定网络接口属性信息；不指定接口显示所有接口属性信息
        connection – 启动、停止和管理网络连接；可简写成“con”
            show：查看当前所有可用状态的连接
            up interface：激活（更新）指定接口
            down interface：禁用指定接口
            modify interface [+|-]setting.property value：配置IP地址等属性；此配置同时写入接口配置文件中，永久有效。配置后执行（nmcli con up interface）使之生效；
                [+|-]：原有的基础上增加或删除指定属性；按需使用
                setting.property：
                    ipv4.addresses 0.0.0.0/0：配置v4地址
                    ipv4.gateway：配置v4网关
                    ipv4.dns：配置DNS地址；多地址用空格隔开加引号[/v_act]

status：查看网路接口状态

[root@localhost ~]# nmcli dev status
DEVICE       TYPE      STATE      CONNECTION  
eno16777736  ethernet  connected  eno16777736 
lo           loopback  unmanaged  --

show interface：查看指定网络接口状态信息；不指定接口显示所有接口状态信息

[root@localhost ~]# nmcli dev show eno16777736
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/1
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.251/24
IP4.GATEWAY:                            192.168.1.1
IP4.DNS[1]:                             61.177.7.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:

show：查看当前所有可用状态的连接

[root@localhost ~]# nmcli con show
NAME         UUID                                  TYPE            DEVICE      
eno16777736  3995f76e-6a53-4eb1-afbc-9bedae0e1318  802-3-ethernet  eno16777736

up interface：激活（更新）指定接口

[root@localhost ~]# nmcli con up eno16777736
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/2)

modify interface [+|-]setting.property value：配置IP地址等属性；此配置同时写入接口配置文件中，永久有效。配置后执行（nmcli con up interface）使之生效；
ipv4.addresses 0.0.0.0/0：配置v4地址

[root@localhost ~]# nmcli con mod eno16777736 ipv4.address 192.168.1.249/24
[root@localhost ~]# nmcli con up eno16777736
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/3)
[root@localhost ~]# nmcli dev sh eno16777736
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/3
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.249/24
IP4.GATEWAY:                            192.168.1.1
IP4.DNS[1]:                             61.177.7.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:

ipv4.gateway：配置v4网关

[root@localhost ~]# nmcli con mod eno16777736 ipv4.gateway 192.168.1.254
[root@localhost ~]# nmcli con up eno16777736
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/5)
[root@localhost ~]# nmcli dev show eno16777736
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/5
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.251/24
IP4.GATEWAY:                            192.168.1.254
IP4.DNS[1]:                             61.177.7.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:

ipv4.dns：配置DNS地址；多地址用空格隔开加引号

[root@localhost ~]# nmcli con mod eno16777736 ipv4.dns 192.168.1.1
[root@localhost ~]# nmcli con up eno16777736
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
[root@localhost ~]# nmcli dev show eno16777736                        
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/7
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.251/24
IP4.GATEWAY:                            192.168.1.1
IP4.DNS[1]:                             192.168.1.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:                            
[root@localhost ~]# nmcli con mod eno16777736 ipv4.dns "61.177.7.1 221.228.255.1"
[root@localhost ~]# nmcli con up eno16777736                                     
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
[root@localhost ~]# nmcli dev show eno16777736                                   
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/8
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.251/24
IP4.GATEWAY:                            192.168.1.1
IP4.DNS[1]:                             61.177.7.1
IP4.DNS[2]:                             221.228.255.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:

[+|-]：原有的基础上增加或删除指定属性；按需使用，下面以增加IP地址和删除DNS演示

[root@localhost ~]# nmcli con mod eno16777736 +ipv4.address 192.168.1.250/24
[root@localhost ~]# nmcli con up eno16777736                                
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/9)
[root@localhost ~]# nmcli dev show eno16777736                              
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/9
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.251/24
IP4.ADDRESS[2]:                         192.168.1.250/24
IP4.GATEWAY:                            192.168.1.1
IP4.DNS[1]:                             61.177.7.1
IP4.DNS[2]:                             221.228.255.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:                            
[root@localhost ~]# nmcli con mod eno16777736 -ipv4.dns 221.228.255.1
[root@localhost ~]# nmcli con up eno16777736                         
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/10)
[root@localhost ~]# nmcli dev show eno16777736                       
GENERAL.DEVICE:                         eno16777736
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         00:0C:29:BA:B7:75
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     eno16777736
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/10
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.1.251/24
IP4.ADDRESS[2]:                         192.168.1.250/24
IP4.GATEWAY:                            192.168.1.1
IP4.DNS[1]:                             61.177.7.1
IP6.ADDRESS[1]:                         fe80::20c:29ff:feba:b775/64
IP6.GATEWAY:

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