Returns -1 on hangup; otherwise, does not return.

如果挂起则返回- 1，否则没有返回值。

Hollywood hangup means that you hang up the phone without indication.

“好莱坞式挂电话”就是指事先没有任何征兆地挂断电话。

Listing 2 shows one way of sending the hangup signal to all of the Web server processes currently running.

清单2显示了向所有正在运行的Web服务器进程发送挂起信号的一种方法。

The nohup command is used to start a command that will ignore hangup signals and will append stdout and stderr to a file.

nohup命令用于启动一个忽略hangup信号的命令，并且将stdout和stderr附加到文件。

The xargs command then takes each process ID (since you used -l 1 to grab one line at a time), and USES sudo kill -hup to send each one a hangup signal.

然后，xargs命令接受每个进程ID(因为使用了- l 1以便一次提取一行内容)，并使用sudo kill - HUP向相应的进程发送一个挂起信号。