=〜运算子附近的语法错误

问题描述

当我运行此脚本时:

#!/bin/bash

if [[ "abcd" =~ ^.*$ ]]; then
    echo "something"
fi

我得到:

./tmp2.sh: line 3: conditional binary operator expected
./tmp2.sh: line 3: syntax error near `=~'
./tmp2.sh: line 3: `if [[ "abcd" =~ ^.*$ ]]; then'

我尝试了所有发现的建议，但仍然相同:/请帮帮我！

I've tried all suggestions I've found, but still the same:/Help me, please!

推荐答案

鉴于您看到的是 bash特定的错误消息，我们可以排除 bash 之外的 strong 以外的其他东西正在运行脚本(如果它是仅POSIX功能的外壳，例如在某些系统上为sh，则您会看到一个与[[有关的错误消息.

Given that you're seeing a bash-specific error message, we can rule out that something other than bash is running the script (if it were a POSIX-features-only shell, such as sh on some systems, you'd instead see an error message relating to [[).

最可能的解释:

• 您的 bash版本是< 3.0 ，因此不支持=~运算符.
  • 要进行验证，请在脚本中运行echo $BASH_VERSION.
  • Your bash version is < 3.0, and therefore doesn't support the =~ operator.
    • To verify, run echo $BASH_VERSION in your script.

    您看到的特定错误是bash的表达方式:我看到的字符串我不认识为运算符."

    The specific error you're seeing is bash's way of saying: "I'm seeing a string I don't recognize as an operator."

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