-bash:导出:`“"JAVA_HOME =/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home"":不是有效的标识符 [英] -bash: export: `“JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home”': not a valid identifier

问题描述

我正在尝试在Mac机器上设置Java和Hadoop，并且这样做是使用以下命令:

I am trying to set up Java and Hadoop on my Mac machine, and in doing so, I am using this command:

$ echo export "JAVA_HOME=$(/usr/libexec/java_home)" >> ~/.bash_profile
$ source ~/.bash_profile

但是，当我输入source〜/.bash_profile时，会出现此错误:

However, when I type source ~/.bash_profile it gives me this error:

-bash: export: `"JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home"': not a valid identifier

为什么这么说?

推荐答案

这看起来更正确:

echo 'export JAVA_HOME="$(/usr/libexec/java_home)"' >> ~/.bash_profile

注意:

• 使用标准ASCII引号，而不使用卷曲的智能引号".
• 单引号用于确保在运行echo之前不评估命令替换，而是将其添加到.bash_profile中.

• Standard ASCII quotes, not curly "smart quotes", are used.
• Single quotes are used to ensure that the command substitution is not evaluated before the echo is run, but instead is added to your .bash_profile.

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