今天在服务器上进行测试程序，发现网速占用比较大，但不是我的程序。可能是其他同学在下载或者上传数据，所以需要看到底是哪个进程。
这时候使用 iftop, vnstat 等命令不能看出具体是哪个进程占用，因为它们常用来统计和监控网卡流量。通过搜索发现，NetHogs 可以满足我的需求；
具体界面如下：
下面简要记录一些程序相关的信息，方便之后回顾。
安装：
apt install nethogs程序说明：（其中有一些可以交互的操作）
NAME
nethogs - Net top tool grouping bandwidth per process
SYNOPSIS
nethogs [-h] [-V] [-d] [-v] [-t] [-c] [-p] [-s] [device(s)]
DESCRIPTION
NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet,
like most such tools do, it groups bandwidth by process - and does not rely on a special kernel module to be loaded.
So if there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this,
and if it's some kind of spinning process, kill it.
Options
-h display available commands usage.
-V prints Version info.
-d delay for refresh rate.
-v select view mode
-p sniff in promiscious mode (not recommended).
-t tracemode.
-c limit number of refreshes
-s sort by traffic sent
device(s) to monitor. By default eth0 is being used.
INTERACTIVE CONTROL
m cycle between display modes (kb/s, kb, b, mb)
r sort by 'received'
s sort by 'sent'
q quit
SEE ALSO
netstat(8) tcpdump(1) pcap(3)之前写过的关于网络监控工具的文章，可以参考：
slurm 网路监控软件使用：https://www.cnblogs.com/xuyaowen/p/linux-slurm.html
观察网络流量的工具-iptraf-ng：https://www.cnblogs.com/xuyaowen/p/linux-iptraf.html
netperf 网络测试工具：https://www.cnblogs.com/xuyaowen/p/netperf.html
iperf 一个测试网络吞吐的工具：https://www.cnblogs.com/xuyaowen/p/iperf-for-network.html
保持更新；cnblogs.com/xuyaowen