iftop 带宽使用情况
netstat  接口统计报告

nethogs

yum install -y nethogs

nethogs eth0
默认一秒刷新一次

nethogs eth0 -d 5 
监控网卡eth0带宽占用情况，五秒刷新一次

可同时监控多个
nethogs eth0 eth1


nethogs em1

   PID USER     PROGRAM                                                                    DEV        SENT      RECEIVED       
  24050 root     ./node_exporter                                                            em1   	2.117       0.112 KB/sec
  35071 root     /root/soft/jdk1.8.0_191/bin/java                                           em1   	1.726       0.099 KB/sec
  38525 root     /root/soft/jdk1.8.0_191/bin/java                                           em1   	0.153       0.087 KB/sec
  38441 root     /root/soft/jdk1.8.0_191/bin/java                                           em1   	0.153       0.087 KB/sec
  41556 root     sshd: root@pts/0                                                           em1         0.162       0.052 KB/sec