With this plugin you will be able to kill all players online in the server by typing /killall.
The plugin also says the number of killed players or if it's just you on the server it will let you know that it hasn't found any players.
Here's an example of what the plugin does when it doesn't find any players on the server:
You must be an op to execute this command. Download Here: KillAll 1.1
The Kill All Team
