Install netstat on Debian 12

Check if it is installed

netstat

If you see "command not found", install the package.

Install netstat

sudo apt install net-tools -y

Check the install

netstat

Basic commands

Listening ports

netstat -l

Ports with numbers and program names (needs sudo for the program names)

sudo netstat -plnt

The options mean: -p program, -l listening, -n numbers, -t TCP.

Statistics

netstat -s

TCP and UDP connections

netstat -t
netstat -u

The routing table

netstat -r

A modern alternative

netstat is old. The newer tool ss is installed by default and shows the same data:

ss -tulpn

Uninstall

sudo apt remove net-tools -y

To remove the settings files as well:

sudo apt purge net-tools

Quick recap

• sudo apt install net-tools adds netstat.
• sudo netstat -plnt shows listening ports and programs.
• ss -tulpn is the modern replacement.