查看Linux系统网卡信息

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  --ethernet  virbr0-nic
virbr0       ff7c93dd-05ae---77218b2ad5dd  bridge          virbr0
eno16777736  ce2fa92b-adf1--84c2-988f2ffcd07d  --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--84c2-988f2ffcd07d
connection.interface-name:              eno16777736
connection.type:                        --ethernet
connection.autoconnect:                 yes
connection.autoconnect-priority:
connection.timestamp:
connection.read-only:                   no
connection.permissions:
connection.zone:                        --
connection.master:                      --
connection.slave-type:                  --
connection.autoconnect-slaves:          - (default)
connection.secondaries:
connection.gateway-ping-timeout:
connection.metered:                     未知
--ethernet.port:                    --
--ethernet.speed:
--ethernet.duplex:                  --
--ethernet.auto-negotiate:          yes
--ethernet.mac-address:             --
--ethernet.cloned-mac-address:      --
--ethernet.mac-address-blacklist:
--ethernet.mtu:                     自动
--ethernet.s390-subchannels:
--ethernet.s390-nettype:            --
--ethernet.s390-options:
--ethernet.wake-on-lan:              (default)
--ethernet.wake-on-lan-password:    --
ipv4.method:                            auto
ipv4.dns:
ipv4.dns-search:
ipv4.addresses:
ipv4.gateway:                           --
ipv4.routes:
ipv4.route-metric:                      -
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:                      -
ipv6.ignore-auto-routes:                no
ipv6.ignore-auto-dns:                   no
ipv6.never-default:                     no
ipv6.may-fail:                          yes
ipv6.ip6-privacy:                       - (未知)
ipv6.dhcp-send-hostname:                yes
ipv6.dhcp-hostname:                     --
GENERAL.名称:                           eno16777736
GENERAL.UUID:                           ce2fa92b-adf1--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/
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/Settings/
GENERAL.SPEC 对象:                      /
GENERAL.MASTER-PATH:                    --
IP4.地址[]:                            192.168.157.135/
IP4.网关:                               192.168.157.2
IP4.DNS[]:                             192.168.157.2
IP4.域[]:                              localdomain
DHCP4.选项[]:                          requested_domain_search =
DHCP4.选项[]:                          requested_nis_domain =
DHCP4.选项[]:                          requested_time_offset =
DHCP4.选项[]:                          requested_broadcast_address =
DHCP4.选项[]:                          requested_rfc3442_classless_static_routes =
DHCP4.选项[]:                          requested_classless_static_routes =
DHCP4.选项[]:                          requested_domain_name =
DHCP4.选项[]:                          expiry =
DHCP4.选项[]:                          domain_name = localdomain
DHCP4.选项[]:                         next_server = 192.168.157.254
DHCP4.选项[]:                         broadcast_address = 192.168.157.255
DHCP4.选项[]:                         dhcp_message_type =
DHCP4.选项[]:                         requested_subnet_mask =
DHCP4.选项[]:                         dhcp_lease_time =
DHCP4.选项[]:                         routers = 192.168.157.2
DHCP4.选项[]:                         ip_address = 192.168.157.135
DHCP4.选项[]:                         requested_static_routes =
DHCP4.选项[]:                         requested_interface_mtu =
DHCP4.选项[]:                         requested_nis_servers =
DHCP4.选项[]:                         requested_wpad =
DHCP4.选项[]:                         requested_ntp_servers =
DHCP4.选项[]:                         requested_domain_name_servers =
DHCP4.选项[]:                         domain_name_servers = 192.168.157.2
DHCP4.选项[]:                         requested_ms_classless_static_routes =
DHCP4.选项[]:                         requested_routers =
DHCP4.选项[]:                         subnet_mask = 255.255.255.0
DHCP4.选项[]:                         network_number = 192.168.157.0
DHCP4.选项[]:                         requested_host_name =
DHCP4.选项[]:                         dhcp_server_identifier = 192.168.157.254
IP6.地址[]:                            fe80::20c:29ff:fe74:71c9/
IP6.网关: