In a general implementation these don't need regular UNIX signals.
在一个实施这些一般不需要常规的UNIX信号。
Internally, your shell USES UNIX signals to affect the state of processes.
在内部，Shell使用UNIX信号来影响进程的状态。
UNIX includes a wide variety of signals, most of which have a special purpose.
UNIX包括多种信号，它们大多都有特殊目的。
UNIX includes a wide variety of signals, most of which have a special purpose.
UNIX包括多种信号，它们大多都有特殊目的。
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