nmcli是一款能够方便我们配置网络的工具，能够轻松的查看网卡信息或网络状态：
实例1：查看网卡信息
[root@localhost ~]# nmcli connection show 名称 UUID 类型 设备 virbr0-nic 7f3a7bb5-a7ab-440c-b87f-d94e6f4dd96b 802-3-ethernet virbr0-nic virbr0 ff7c93dd-05ae-4794-9030-77218b2ad5dd bridge virbr0 eno16777736 ce2fa92b-adf1-4323-84c2-988f2ffcd07d 802-3-ethernet eno16777736
实例2：查看网卡的连接状态
[root@localhost ~]# nmcli device status 设备 类型 状态 CONNECTION virbr0 bridge 连接的 virbr0 eno16777736 ethernet 连接的 eno16777736 virbr0-nic ethernet 连接的 virbr0-nic lo loopback 未管理 --
实例３：查看网卡的详细信息
[root@localhost ~]# nmcli connection show eno16777736 connection.id: eno16777736 connection.uuid: ce2fa92b-adf1-4323-84c2-988f2ffcd07d connection.interface-name: eno16777736 connection.type: 802-3-ethernet connection.autoconnect: yes connection.autoconnect-priority: 0 connection.timestamp: 1473736348 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: 未知 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: 自动 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 (未知) ipv6.dhcp-send-hostname: yes ipv6.dhcp-hostname: -- GENERAL.名称: eno16777736 GENERAL.UUID: ce2fa92b-adf1-4323-84c2-988f2ffcd07d GENERAL.设备: eno16777736 GENERAL.状态: 已激活 GENERAL.默认: 是 GENERAL.DEFAULT6: 否 GENERAL.VPN: 否 GENERAL.ZONE: -- GENERAL.DBUS-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0 GENERAL.CON-PATH: /org/freedesktop/NetworkManager/Settings/0 GENERAL.SPEC 对象: / GENERAL.MASTER-PATH: -- IP4.地址[1]: 192.168.157.135/24 IP4.网关: 192.168.157.2 IP4.DNS[1]: 192.168.157.2 IP4.域[1]: localdomain DHCP4.选项[1]: requested_domain_search = 1 DHCP4.选项[2]: requested_nis_domain = 1 DHCP4.选项[3]: requested_time_offset = 1 DHCP4.选项[4]: requested_broadcast_address = 1 DHCP4.选项[5]: requested_rfc3442_classless_static_routes = 1 DHCP4.选项[6]: requested_classless_static_routes = 1 DHCP4.选项[7]: requested_domain_name = 1 DHCP4.选项[8]: expiry = 1473738337 DHCP4.选项[9]: domain_name = localdomain DHCP4.选项[10]: next_server = 192.168.157.254 DHCP4.选项[11]: broadcast_address = 192.168.157.255 DHCP4.选项[12]: dhcp_message_type = 5 DHCP4.选项[13]: requested_subnet_mask = 1 DHCP4.选项[14]: dhcp_lease_time = 1800 DHCP4.选项[15]: routers = 192.168.157.2 DHCP4.选项[16]: ip_address = 192.168.157.135 DHCP4.选项[17]: requested_static_routes = 1 DHCP4.选项[18]: requested_interface_mtu = 1 DHCP4.选项[19]: requested_nis_servers = 1 DHCP4.选项[20]: requested_wpad = 1 DHCP4.选项[21]: requested_ntp_servers = 1 DHCP4.选项[22]: requested_domain_name_servers = 1 DHCP4.选项[23]: domain_name_servers = 192.168.157.2 DHCP4.选项[24]: requested_ms_classless_static_routes = 1 DHCP4.选项[25]: requested_routers = 1 DHCP4.选项[26]: subnet_mask = 255.255.255.0 DHCP4.选项[27]: network_number = 192.168.157.0 DHCP4.选项[28]: requested_host_name = 1 DHCP4.选项[29]: dhcp_server_identifier = 192.168.157.254 IP6.地址[1]: fe80::20c:29ff:fe74:71c9/64 IP6.网关: