Checking ports on Linux is a crucial task for system administrators and network engineers. It allows them to identify which services are running on a system, troubleshoot network connectivity issues, and secure the system from unauthorized access. Ports are the endpoints of network connections, and each port is associated with a specific service or application.
There are several commands that can be used to check ports on Linux. The most common command is netstat, which displays a list of all active network connections, including the port numbers and the associated processes.