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Issue description

The example demonstrating tilde expansion for another user (e.g., ~manager1) assumes the user manager1 already exists on the system. However, the material does not instruct learners to create this user beforehand, which can cause confusion when ~manager1 fails to expand and simply returns the literal string.

Follow the example as shown:

echo ~manager1

Observe that it returns ~manager1 instead of /home/manager1 if the user does not exist.

Please review and fix with steps or Note

Steps to reproduce:

Workaround:

Expected result: