You’ve just deployed a service, opened a firewall rule, or configured a reverse proxy, and now you want to confirm that a specific port is actually reachable. The problem is that telnet isn’t installed, and installing an extra package just for a quick connectivity test feels unnecessary.
The good news is that you don’t need telnet, because most Linux distributions already include tools that can test port connectivity, and some require no additional installation at all.
Whether you’re troubleshooting a MySQL connection, checking if Nginx is listening on port 443, or verifying that a firewall change worked as expected, these tools can quickly tell you what’s happening.