1.查看服务器网络端口

ifconfig

查看带宽大小：sudo ethtool xxx

sudo ethtool eth0

[root@centos7-spider ~]# ethtool eth0
Settings for eth0:
	Supported ports: [ TP ]
	Supported link modes:   1000baseT/Full 
	                        10000baseT/Full 
	Supported pause frame use: No
	Supports auto-negotiation: No
	Advertised link modes:  Not reported
	Advertised pause frame use: No
	Advertised auto-negotiation: No
	Speed: 10000Mb/s
	Duplex: Full
	Port: Twisted Pair
	PHYAD: 0
	Transceiver: internal
	Auto-negotiation: off
	MDI-X: Unknown
	Supports Wake-on: uag
	Wake-on: d
	Link detected: yes

Speed: 10000Mb/s 带宽为万兆

nload

Device eth0 [10.16.169.14] (1/2):
====================================================================
Incoming:
                                          Curr: 27.99 kBit/s
                                          Avg: 33.14 kBit/s
                                          Min: 19.02 kBit/s
                                          Max: 116.44 kBit/s
                                          Ttl: 74.46 GByte
Outgoing:
                                          Curr: 20.26 kBit/s
                                          Avg: 83.46 kBit/s
                                          Min: 17.72 kBit/s
                                          Max: 3.19 MBit/s
                                          Ttl: 145.30 GByte

Incoming也就是进入网卡的流量，Outgoing，也就是从这块网卡出去的流量，每一部分都有下面几个。

Curr：当前流量

Avg：平均流量

Min：最小流量

Max：最大流量

Ttl：总流量

nload默认的是eth0网卡，如果你想监测eth1网卡的流量，可以使用下面的命令。

nload eth1

同时查看多个网卡的流量情况

nload -m

//结果如下：
Device eth0 [10.16.169.14] (1/2):
========================================================================================
Incoming:                                   Outgoing:
Curr: 30.23 kBit/s                          Curr: 28.14 kBit/s
Avg: 32.80 kBit/s                           Avg: 69.48 kBit/s
Min: 23.65 kBit/s                           Min: 18.23 kBit/s
Max: 133.16 kBit/s                          Max: 3.17 MBit/s
Ttl: 74.46 GByte                            Ttl: 145.30 GByte

Device lo [127.0.0.1] (2/2):
========================================================================================
Incoming:                                   Outgoing:
Curr: 0.00 Bit/s                            Curr: 0.00 Bit/s
Avg: 150.82 kBit/s                          Avg: 150.82 kBit/s
Min: 0.00 Bit/s                             Min: 0.00 Bit/s
Max: 7.51 MBit/s                            Max: 7.51 MBit/s
Ttl: 276.67 GByte                           Ttl: 276.67 GByte