VPS bandwidth spike exactly once every hour

I am using Ubuntu 18.04 on a digitalocean droplet.

Here you can see the DigitalOcean bandwidth monitor graph

As you can see in the image the spikes occur exactly once every hour. According to the digitalocean monitor they start at hour:50minutes and they stop at nextHour:10minutes the peak being at hour:00 minutes.

I am new to ubuntu and I don't know how to find out what is causing those spikes.Please help :D.

1 Answer

this is a very popular question.

I would suggest to to install Nethogs

sudo apt-get install nethogs

Then, if you want to check your internet traffic.

sudo nethogs eth0

If you want to check your LAN traffic (VPS)

sudo nethogs eth1

Here You have some links to possible answers.
1.How to monitor bandwidth usage per process?
2.How do I find out which process is eating up my bandwidth?