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Add/edit Unix/Linux server connection details - Spotlight Cloud Help
How to ping and test for a specific port from Linux or Unix command line - nixCraft
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Linux and Unix Port Scanning With netcat [nc] Command - nixCraft
Test if a port on a remote system is reachable
KB14487: How to test connectivity to SQL Server from UNIX
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Netcat | How to use netcat commands [+examples] - IONOS
Telnet Command Usage in Linux/Unix | DigitalOcean
