I just learned the neatest trick and I just had to share it.
I was unable to connect to a vSphere 5 server using the VMware vSphere Client.
I needed to quickly reboot that server from remote. I did have access to the server via SSH using Putty.
What I learned is that after you login via SSH just type the command: dcui
and viola! you have access to the console:
Sweet! This will be easy for me to remember, "David Cocke's User Interface".
To exit the above and return to the command line console, press CTRL-C.
A couple of days later I found my self in a situation where I couldn't access the server via the vSphere Client and rebooting via the above GUI console didn't work either.
What did work was this command:
The -r of course means reboot. Without it, it will shutdown and not reboot. You have to be patient after you issue this command. In my case it took almost a minute before you actually started seeing a response.