Как посмотреть, какой процесс слушает порт 80?

To find out which process is listening on port 80, you can use several commands in Linux:

1. sudo lsof -i :80 — shows processes that have opened port 80.
2. sudo netstat -tulpn | grep :80 — displays a list of processes with their PIDs listening on port 80.
3. sudo ss -tulpn | grep :80 — a modern alternative to netstat.

Example:

sudo lsof -i :80

The output will show the process name and PID, which helps identify which application is using port 80.