Linux BASH：发送SIGTSTP信号（ctrl+z）
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BASH: send SIGTSTP signal (ctrl+z)
提问by noobler
I'm rushing against the clock for a programming assignment in which I have to run a number of instances of the same program on the same machine at the same time. Currently, I'm starting the instances one at a time, pressing Ctrl+zto pause them, and then doing 'bg %#' to resume execution in the background.
我正在争分夺秒地进行编程任务，在该任务中我必须同时在同一台机器上运行同一程序的多个实例。目前，我一次启动一个实例，按Ctrl+z暂停它们，然后执行'bg %#' 以在后台恢复执行。
This is extremely tedious and time consuming to do every time I need to test a small change in my application, so I want to write a bash script that will start the multiple instances for me, however I don't know how to do the background switching in a script.
每次我需要在我的应用程序中测试一个小的更改时，这都是非常乏味和耗时的，所以我想编写一个 bash 脚本来为我启动多个实例，但是我不知道如何做后台在脚本中切换。
Can anybody please tell me how I can write a simple script that will start a long standing command, pause it, and resume it in the background?
谁能告诉我如何编写一个简单的脚本来启动一个长期存在的命令，暂停它并在后台恢复它？
Thanks
谢谢
采纳答案by Edward Thomson
Do you want to just startit in the background? For example:
你想在后台启动它吗？例如：
mycommand &
If you want finer grained job control, you can emulate Ctrl-Zand bg. Control-Zsends SIGTSTP("tty stop") to the program, which suspends it:
如果您想要更细粒度的作业控制，您可以模拟Ctrl-Z和bg. Control-Z发送SIGTSTP（“tty stop”）到程序，暂停它：
kill -TSTP [processid]
And the bgcommand just sends it a SIGCONT:
该bg命令只是向它发送一个SIGCONT：
kill -CONT [processid]
回答by Ignacio Vazquez-Abrams
You don't. You put an ampersand after the command.
你没有。你在命令后加一个 & 号。
command1 &
command2 &
command3 &
