Ubuntu ifconfig查看網卡信息 lo enp2s0 wlp3s0 具體含義

涵義

如何通過命令查看本機IP？
Windows：ipconfig /a
Linux：ifconfig或iwconfig
我會查看到3個項目：
lo
wlp3s0
enp2s0
挨個解析：

• lo表示local
• wl表示wlan(Wireless Local Area Network)無線局域網
• en表示ethernet以太網
• PCI接口的物理位置的座標(bus, slot)，其中bus表示總線，slot表示插槽。

再看:

• wlp3s0表示，WLAN PCI接口位置：bus=3, slot=0。
• enp2s0表示，Etnernet PCI接口位置：bus=2, slot=0。

PCI 外設部件互連標準(Peripheral Component Interconnect)

shell操作

wuyujin@ubuntu18:~$ ifconfig
enp2s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether [xxx]  txqueuelen 1000  (Ethernet)
        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

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 16285  bytes 1914437 (1.9 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 16285  bytes 1914437 (1.9 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet [IP地址]  netmask [網關地址]  broadcast [子網掩碼]
        inet6 [IPV6]  prefixlen 64  scopeid 0x20<link>
        ether [xxx]  txqueuelen 1000  (Ethernet)
        RX packets 926526  bytes 1261489274 (1.2 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 377109  bytes 50598690 (50.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wuyujin@ubuntu18:~$ 

Others

wuyujin@ubuntu18:~$ whatis ifconfig
ifconfig (8)         - configure a network interface
wuyujin@ubuntu18:~$ whatis iwconfig
iwconfig (8)         - configure a wireless network interface
wuyujin@ubuntu18:~$ 

ifconfig 用於配置網絡接口 InterFace config
iwconfig 用於配置無線網絡接口 Interface Wlan config