netstat: Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.
ss: Utility to investigate sockets
ethtool: Display or change Ethernet device settings.
route: Show/manipulate the IP routing table.
After adding a default gateway for learning purpose, don’t forget to delete it with this command: sudo route del default gw <gateway ip>. If you forget to delete, it maybe cause a connectivity problem.
dig: DNS lookup utility.
nslookup: Query Internet name servers interactively.
mtr: Network diagnostic tool that combines ping and traceroute.
ping: Send ICMP ECHO_REQUEST to network hosts.
glances: Real-time monitoring tool that provides a comprehensive overview of system resources, including network usage.
After installing the tool, enter this command and hit enter.
It will open a new windows like this screenshot.
nethogs: Monitors network traffic bandwidth used by each process.
If you don’t have the tool installed, you can install it with this command: sudo apt-get install nethogs -y
After installing enter this command ( see the screenshot) and hit enter.
Then a new windows will open.
I open a firefox, so you can see that on the screenshot.
Congrats!! You have learned some of the most important network command in Linux based operating system.
