1、nmcli命令的作用
nmcli ： command‐line tool for controlling NetworkManager NetworkManager：動態管理和監控網絡設置的守護進程。用戶和腳本都可使用命令行工具 nmcli 控制 NetworkManager
2、語法
nmcli [ OPTIONS ] OBJECT { COMMAND | help }
OPTIONS
-t[erse] （常用于腳本） terse output
-p[retty] （常用于用戶） 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 （只要不造成歧義，可簡寫，OBJIECT后按TAB鍵可以看到更多參數）
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、具體用法
在 nmcli 中采用命令完成功能，無論何時您不確定可用的命令選項時，都可以按 Tab 查看。
（1）顯示所有網絡連接
[root@linuxpao network-scripts]# nmcli -p connection show （顯示結果因人而異） ============================================================================== 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：輸出結果中的 NAME 字段永遠代表連接 ID（名稱）。它不是接口名稱（盡管看起來很像）。只要不產生歧義，nmcli命令后接的參數都可以簡寫的如 connection 簡寫成 c ，show 簡寫成 s 。
[root@linuxpao network-scripts]# nmcli c s （用TAB鍵可以看到show后接選項） --active eth0 id --show-secrets team0-eth0 uuid virbr0-nic apath help path team0 team0-eth1 virbr0
（2）顯示具體網絡連接的狀態
[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）顯示所有設備狀態
[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）創建新連接default ，IP 自動通過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）刪除網絡連接
[root@linuxpao network-scripts]# nmcli con del defalut Connection 'defalut' (4cff2e32-14ce-4ece-923e-515727e29c5f) successfully deleted.
（6）創建新連接 static ，指定靜態 IP ，不自動連接
[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）啟用網絡連接
[root@linuxpao ~]# nmcli connection up static （禁用即將up改為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（+號表示增加，-號表示減少）
（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）禁用網卡，防止被自動激活
[root@linuxpao network-scripts]# nmcli device disconnect eth1 Device 'eth1' successfully disconnected.
原創文章，作者：pao，如若轉載，請注明出處：http://www.www58058.com/45146
文章思路清晰，結構命令，排版整潔。