如何在执行之前打印每个命令? [英] How can I print each command before executing?

问题描述

设置Bash脚本以在执行每个命令之前将其打印出来的最佳方法是什么?

What is the best way to set up a Bash script that prints each command before it executes it?

这对于调试目的非常有用.

That would be great for debugging purposes.

我已经尝试过了:

CMD="./my-command --params >stdout.txt 2>stderr.txt"
echo $CMD
`$CMD`

应该首先打印出来:

./my-command --params >stdout.txt 2>stderr.txt

然后执行./my-command --params，将输出重定向到指定的文件.

And then execute ./my-command --params, with the output redirected to the files specified.

推荐答案

set -o xtrace

或

bash -x myscript.sh

这也适用于标准的/bin/sh和IIRC(然后可能是POSIX)

记住，这里有 bashdb (bash Shell Debugger, release 4.0-0.4)

要恢复正常，请退出子Shell或

To revert to normal, exit the subshell or

set +o xtrace

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