telnet

• If you need to check connectivity to a remote host over a given port then good old telnet is your first option since you can't use ping over a specific port. —  WinInfo
• "You're not going to want to hear this," I responded, "but telnet is your friend on this one." toconnell@lana: ~ / tmp$ telnet tyrannybelle. com 80 —  almost effortless
• Granted, you don't get any syntax highlighting or fancy stuff, but if you're debugging from a mobile device, a computer without windowing software or in any other circumstance you can't use a proper browser, telnet is a great way to eyeball a website. —  almost effortless
• If no arguments are given, it will attempt to load the default script, openocd. cfg, in the current working directory. openocd can connect to telnet or gdb to interact with it once it's launched. —  Sun Bloggers
• Connect with telnet (I use PuTTY) with localhost as IP and port 4444 as telnet port number. —  Sun Bloggers

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