如何从文本文件中获取变量到 Bash 变量中
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How to get variable from text file into Bash variable
提问by AndyW
Simple question, in BASH I'm trying to read in a .pid file to kill a process. How do I read that file into a variable. All the examples I have found are trying to read in many lines. I only want to read the one file that just contains the PID
一个简单的问题，在 BASH 中，我试图读取 .pid 文件以终止进程。如何将该文件读入变量。我发现的所有例子都试图在多行中阅读。我只想读取一个只包含 PID 的文件
#!/bin/sh
PIDFile="/var/run/app_to_kill.pid"
CurPID=(<$PIDFile)
kill -9 $CurPID
回答by SiegeX
You're almost there:
您快到了：
CurPID=$(<"$PIDFile")
In the example you gave, you don't even need the temp variable. Just do:
在您给出的示例中，您甚至不需要临时变量。做就是了：
kill -9 $(<"$PIDFile")
