SIGKILL (signal 9)

SIGKILL（信号 9）

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One special signal, SIGKILL, can't be blocked or caught, and it kills a process immediately.

有一个特殊的信号 SIGKILL 是无法被阻塞或捕捉的，它会立即终止某个进程。

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Off: If the process is currently running, send the signal SIGTERM, then SIGKILL in 20 seconds.

off：如果目前进程正在运行，则发送信号SIGTERM，并在20秒后发送SIGKILL。

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