What does export do?

The export command in a Unix-like shell is used to set environment variables or mark them for export to child processes.

Sets Variables: When you use export VAR=value, it creates an environment variable VAR with the specified value.
Makes Variables Available: The variable becomes accessible to any subprocess started from that shell session, allowing those processes to use the variable.
Example:
```
export MY_VAR="Hello"
```
This command sets MY_VAR to "Hello" and makes it available to any child processes.

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