How Linux file permissions actually work under the hood, why symbolic mode is your best friend, and how to stop blindly typing chmod 777. Every Linux engineer has been there. You write a brand-new bash script, try to run it from your terminal, and hit an immediate roadblock: $ .

Source: [Dev.to](https://dev.to/asepsayyad007/understanding-chmod-without-memorizing-numbers-553h)

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