Explain Linux file permissions and chmod 755.
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“Explain Linux file permissions and chmod 755.”
🧠Mind Map Answer
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Every file has three permission groups: owner, group, others — each with read(4), write(2), execute(1).
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chmod 755 deploy.sh
ls -l deploy.sh
# -rwxr-xr-x owner can edit+run, everyone else can run🔥What If?
Think Beyond the Expected
What does chmod +x file actually change?
It adds the execute bit for all three groups (owner, group, others) without touching read/write — a shortcut when you just need to make a script runnable.
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Plain-language foundations
I'm preparing for a software engineering interview and want to understand this from scratch, as a beginner. Topic: Permissions (Linux) Interview question: "Explain Linux file permissions and chmod 755." Please: 1. Explain the core idea in simple, plain language, using an everyday analogy. 2. Define any technical terms you use. 3. Walk through one small, concrete example. 4. Finish with a single sentence I can easily remember. Keep the tone friendly and assume I'm new to this topic.
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