On the system, check to see that Linux is recognising the serial ports: Most motherboards have either one or two serial ports. Take a look at the back of your server, and see if it has a 9-pin serial port. One of the most important things we need to check that you do actually have a serial port on the server :). I'm using Debian Etch on the server and Ubuntu Edgy on my client, although this should work on any Linux distribution. In the end, the GRUB menu will appear over the serial link, as will the bootup messages (output when booting the system). This is quite useful if your Linux server is in a headless configuration (no keyboard or monitor), as it allows you to easily get a console on the system if there are any problems with it (especially network problems, when SSH is not available). This tutorial will show you how to set up a serial console on a Linux system, and connect to it via a null modem cable. ![]() KVM switches can only switch between the connected network devices, but console servers can access the system consoles of network devices to monitor and control their functionality. ![]() ![]() KVM switches can control PCs and servers, while console servers can control other serial and network-connected devices.
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