Usefull Tools for DEBIAN / UBUNTU

Network interface traffic monitoring

Tool to check overall or interface level internet bandwidth usage

sudo apt install iftop

Run to check default eth interface traffic

sudo iftop

Run to cheeck traffic of a given interface

sudo iftop -i end0
sudo iftop -i wlan0

Check interface name using

ip addr

Check Running Process

Displays a comprehensive, static snapshot of every running process on the system

ps aux

For a better visual display we can use

htop

To search for a specific named process - e.g. sshd

ps aux | grep sshd

To show only Process ID - e.g. sshd

pgrep sshd