以下にダイアログの各項目を説明します。
A radio button lets you select between a reboot or a shutdown. A shutdown performs the same operations as reboot except that it brings the machine to a complete endless stop. The only alternative left after that is to turn off the power or use the reset button to restart it. A reboot will end all of the processes, but once all of them are shut down, will launch the startup sequence again.
On a multi-user system or a server, it may be wise to give people some time to finish their current task before shutting down the computer. If you just want to shutdown or reboot NOW, then enter 0 here. The number is the amount of minutes between the message broadcast and the effective shutdown.
作業中に、Linuxのシャットダウン機能は、端末にメッセージ (短い説明)を送ることができます。このメッセージは他の(Smabaのよ うな)サービスのユーザへも送ることが期待されます。
Place whatever you want broadcast here including nothing. これは単純にログインしている作業中の各ユーザのTTYに書かれます。