Assigning specific permissions with chmod — rwx for owner, rw for group, x for others (file ‘‘note’’) Which chmod command sets: owner = read+write+execute, group = read+write, others = execute only?

Introduction / Context:
Being able to translate a human description of permissions into a chmod command is a daily task. Here we translate “owner rwx, group rw, others x” into octal.

Given Data / Assumptions:

• Owner needs rwx (read, write, execute).
• Group needs rw- (read and write).
• Others need --x (execute only).
• Target file name is note.

Concept / Approach:

Octal digits encode rwx as r=4, w=2, x=1. Compute each class separately and concatenate the digits.

Step-by-Step Solution:

Verification / Alternative check:

After running the command, ls -l note should display -rwxrw--x, matching the requirement. This confirms the mapping is correct.

Why Other Options Are Wrong:

• chmod 671 note: gives owner = 6 (no execute), group = 7 (adds execute), others = 1 (correct for others) — mismatches the spec.
• chmod 167 note: scrambles the order; owner becomes 1 (wrong), group 6, others 7 — incorrect mapping.
• chmod 4=rwx, g=rw note: invalid syntax; numeric mode must be three digits (or use symbolic modes like u=rwx,g=rw,o=x).
• None of the above: incorrect because 761 is correct.

Common Pitfalls:

Mixing up the order owner-group-others; forgetting that execute is needed to run files or traverse directories; using invalid mixed numeric/symbolic syntax.

Final Answer:

chmod 761 note