How to view open sockets in the system?

To view open sockets in the system, you can use several commands depending on the OS and tasks:

• netstat — a classic utility for displaying network connections.

netstat -tunlp

• -t — TCP

• -u — UDP

• -n — show addresses and ports in numeric form

• -l — listening sockets

• -p — show PID and process name

• ss — a modern alternative to netstat, faster and more informative.

ss -tunlp

• lsof — shows open files, including sockets.

lsof -i

• To view sockets of a specific process, you can use:

ls -l /proc/<pid>/fd | grep socket

These tools will help identify which sockets are open, on which ports, and by which processes.