Question: I know that Linux may, depending on configuration, allow the interactive user to reboot the server by pressing `Ctrl`-`Alt`-`Del` even without logging in. I have a **remote console** session over SSH to a remote server that I cannot log into, but I want to reboot it. Is it possible to somehow send the key combination `Control`-`Alt`-`Delete` over SSH (or `telnet`)? If so, how?

**Edit:** to clarify, I am not just connected to the server's `sshd` over `ssh` - I am connected via a KVM over IP switch, so it's a serial console. But this connection itself is over SSH and my question is how to send the `Ctrl`-`Alt`-`Del` key combination over it.

Answer: 
if you know the username/password of the remote machine, you can use SysInternals [PSShutdown](http://technet.microsoft.com/en-us/sysinternals/bb897541) command to reboot a remote computer. Note, if you have gone to the trouble of forcing SSH to a KVM, your server is probably setup so that you can't reboot machines without logging in. In fact, its the default for servers from MS, if I remember correctly.
Isn't it easier to just issue "shutdown -h now", "reboot" or "halt" on the command line depending on what you prefer to happen to the machine?