ifconfig的使用

查看网卡信息：ifconfig命令及详细介绍

[root@]# ifconfig

ens18: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

    inet 103.109.61.70  netmask 255.255.255.0  broadcast 103.109.61.255
    inet6 fe80::3877:cbff:fe3d:2f43  prefixlen 64  scopeid 0x20<link>
    ether 3a:77:cb:3d:2f:43  txqueuelen 1000  (Ethernet)
    RX packets 579216  bytes 85631220 (81.6 MiB) //接收数据包
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 427506  bytes 100034382 (95.4 MiB) //发送数据包
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

    inet 127.0.0.1  netmask 255.0.0.0
    inet6 ::1  prefixlen 128  scopeid 0x10<host>
    loop  txqueuelen 1000  (Local Loopback)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 0  bytes 0 (0.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

1、ens18 以太网接口（virbr0、virbr-nic类似）

   ens18: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

ens18 ：网卡名称
UP ：表示“接口已启用”
BROADCAST：表示“主机支持广播”
RUNNING ：表示“接口在工作中”
MULTICAST ：表示“主机支持多播”
MTU 1500 ：（最大传输单元）：1500字节