After running chmod 755 script.sh, users still cannot execute the script. What is the most probable cause?

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Linux CLI - File Permissions and Ownership

After running chmod 755 script.sh, users still cannot execute the script. What is the most probable cause?

AThe script is owned by root and cannot be executed by others

BThe script lacks read permission for the owner

CThe filesystem is mounted with the 'noexec' option

DThe script file is empty

Step-by-Step Solution

Solution:

Step 1: Check permissions
chmod 755 grants execute permission to all users.
Step 2: Consider filesystem mount options
If the filesystem is mounted with 'noexec', execution is blocked regardless of permissions.
Step 3: Evaluate other options
Read permission is present; ownership by root doesn't block execution if permissions allow; file emptiness doesn't prevent execution.
Final Answer:
The filesystem is mounted with the 'noexec' option -> Option C
Quick Check:
Mount options can override permissions [OK]

Quick Trick: Mount options like 'noexec' block execution despite permissions [OK]

Common Mistakes:

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