[Solved] What does the chmod 755 filename command do in Linux? — Ans: Sets read, write, execute for owner; read and execute for group and others | Linux CLI

Linux CLI - File Permissions and Ownership

What does the chmod 755 filename command do in Linux?

ARemoves all permissions from everyone

BSets read and write for owner; execute for group and others

CSets read, write, execute for owner; read and execute for group and others

DOnly changes the file owner

Step-by-Step Solution

Solution:

Step 1: Understand numeric permission 755
The digits 7, 5, 5 represent permissions for owner, group, and others respectively. 7 means read(4)+write(2)+execute(1)=7, 5 means read(4)+execute(1)=5.
Step 2: Apply permissions to file
Owner gets full permissions (rwx), group and others get read and execute (r-x). This matches the description in Sets read, write, execute for owner; read and execute for group and others.
Final Answer:
Sets read, write, execute for owner; read and execute for group and others -> Option C
Quick Check:
chmod 755 = rwxr-xr-x [OK]

Quick Trick: Remember 7=rwx, 5=rx, 6=rw [OK]

Common Mistakes:

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What does the chmod 755 filename command do in Linux?