Few tricks for DevOps operations in Linux During networking troubleshooting, to check if a port on the remote server is open, we can use the following command to test telnet via port:$ telnet <hostname> 6663 Trying xxx.xx.xx.xx… Connected to . Escape character is '^]'. ^CConnection closed by foreign host But under some circumstances telnet is not installed on the server or we can’t use telnet (for internal reasons), here are the alternatives to check ports, as telnet: ncat ncat (or nc) i...