Powerfail: Only execute the command if init receives a power fail signal.

powerfail：只在init收到电源故障信号时执行命令。

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It prints a status message and sends the sleep command a SIGINT signal.

它将打印状态信息并将sleep命令发送给SIGINT信号。

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You can view the key mappings that sends specific signal to a process using the "stty -a" command as shown below.

你可以如下所示使用“stty - a”命令查看给进程发送特定信号的键映射。

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This week's despatch of the deputy Chief of Staff of the Israel Defense Forces (IDF) - Maj Gen Moshe Kaplinski - to assume command of operations on the northern front is the clearest signal yet that things have not gone according to plan.

BBC: Man walks past bombed building in Tyre 10 Aug

However, Washington will send a clear signal to Iraq by moving 600 to 1, 000 staff members of the U.S. Central Command from Florida to Qatar to test the feasibility, politically and physically, of permanently relocating the entire headquarters, officials said.

CNN: Bush: U.S. will move on Iraq if U.N. won't