Environment variables are used to store configuration settings and information that can be accessed by applications and processes running in an operating system. Their purposes include:
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Configuration Management: They allow applications to be configured without hardcoding values, making it easier to change settings without modifying the code.
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Flexibility: Environment variables enable applications to adapt to different environments (e.g., development, testing, production) by changing the values of the variables.
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Security: Sensitive information, such as API keys and passwords, can be stored in environment variables instead of being included in the source code, reducing the risk of exposure.
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Portability: Applications can be more portable across different systems since they can rely on environment variables for configuration rather than fixed paths or settings.
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Resource Management: They can be used to specify resource limits, paths, and other operational parameters that affect how applications run.
Overall, environment variables provide a powerful way to manage application settings and behavior dynamically.
