Using the ps Command

Use iftop to locate the TCP port on your machine that is receiving the most traffic. Then use sudo netstat -tup to locate the process owning that port.

Is there a tool that tells me how much network data each process has used at a certain time interval (eg, last hour, last day, ...)?

A very simple approach then is to periodically look in /proc/<PID>/net/dev and store it with a timestamp. Here you can get total packets/bytes sent from a PID.

Learn how to monitor network traffic in Linux and what tools to use to monitor bandwidth usage. The guide lists GUI and command-line tools. Command-Line Linux Network... · Linux Network Monitoring GUI...

I'm looking for a way to log the network traffic of a single Linux process (on Ubuntu, but will look at other flavours too).

NetHogs is a text-based network traffic monitoring tool that displays bandwidth usage by each process or application running on a Linux system.

Install vnstat , it gives logs the usage on a network interface and you can display the usage over different time periods.

By querying the net/dev file in /proc/[pid] . You can read the IO bytes for each used interface. The bandwidth needs to be divided by the uptime of the process.

The nethogs tool only works under Linux operating systems. Let us see how to install and use Nethogs tool on Linux operating systems to see bandwidth usage per ...

By monitoring process network usage, we can determine processes that use up an unusual amount of bandwidth. This allows us to resolve the issue and prevent the ...