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In most cases Super User is the place to ask. There are also sites specifically for Unix & Linux, Ubuntu, and Apple questions, so you might try one of those if they apply. If it's an environment variable specifically for a programming tool (e.g., JAVA_HOME) you should be able to ask on Stack Overflow.

In most cases Super User is the place to ask. There are also sites specifically for Unix & Linux, Ubuntu, and Apple questions, so you might try one of those if they apply. If it's an environment variable specifically for a programming tool (e.g., JAVA_HOME) you should be able to ask on Stack Overflow.

In most cases Super User is the place to ask. There are also sites specifically for Unix & Linux, Ubuntu, and Apple questions, so you might try one of those if they apply. If it's an environment variable specifically for a programming tool (e.g., JAVA_HOME) you should be able to ask on Stack Overflow.

In most cases Super User is the place to ask. There are also sites specifically for Unix & Linux, Ubuntu, and Apple questions, so you might try one of those if they apply. If it's an environment variable specifically for a programming tool (e.g., JAVA_HOME) you should be able to ask on Stack Overflow.

In most cases Super User is the place to ask. There are also sites specifically for Unix & Linux, Ubuntu, and Apple questions, so you might try one of those if they apply. If it's an environment variable specifically for a programming tool (e.g., JAVA_HOME) you should be able to ask on Stack Overflow.

In most cases Super User is the place to ask. There are also sites specifically for Unix & Linux, Ubuntu, and Apple questions, so you might try one of those if they apply. If it's an environment variable specifically for a programming tool (e.g., JAVA_HOME) you should be able to ask on Stack Overflow.