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环境: 本测试环境为CentOS7_x86_64
 方法一:
1,测试网络带宽常用命令(包含安装使用)
  yum  -y install  iperf 
 2,测试时记得关闭防火墙或者自行配置防火墙规则,为了快速测试,这里就直接关闭防火墙
  systemctl stop  firewalld
 3,安装完iperf后,在Server端执行
        iperf   -s -i 1 -f  m
         
         -s表示server,-i表示显示时间间隔,-f表示显示格式化的单位
 4,在Client端执行如下命令
  iperf -c 10.241.18.1 -i 1 -t 30 -f m
         
     -c表示客户端,后面接server的地址,-t代表运行的时间
 方法二:
 使用speedtest-cli命令。
1,安装speedtest-cli
yum  –y install python-pip 
 pip install speedtest-cli
 2,测试带宽
三,查看网卡,网络情况
1,使用nload命令查看
 yum -y install nload
2, 查看eth0网卡网络情况
 nload eth0
 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 -m
3,使用iftop命令查看
 yum -y install iftop
4,使用iftop命令测试
 iftop
5,使用nethogs命令查看各个进程使用网络的情况
     yum  -y  install nethogs
 6,使用nethogs命令查看进程使用网络的情况
 nethogs
以上只是个人工作会使用的一些常用的命令,不足之处希望大家多多指点。