LFCA Question #28: Real Exam Question with Answer & Explanation

The correct answer is B: chmod. The chmod command (change mode) is the standard Unix/Linux utility used to change the file system permissions of files and directories. It allows users to control read, write, and execute access for the owner, group, and others.

Submitted by helene.fr· May 4, 2026Linux Fundamentals

Question

What command is used to set or change permission attributes of files (such as read, write, execute)?

Options

Achacl
Bchmod
Cchown
Dsetattr

Explanation

The chmod command (change mode) is the standard Unix/Linux utility used to change the file system permissions of files and directories. It allows users to control read, write, and execute access for the owner, group, and others.

Common mistakes.

A. The chacl command is used to modify Access Control Lists (ACLs) on files and directories, which are a more granular permission system than standard Unix permissions, but chmod addresses the basic read/write/execute attributes.
C. The chown command (change owner) is used to change the user owner and/or group owner of a file or directory, not its permission attributes.
D. The setattr function is a system call used by programs to set file attributes, but it is not a direct command-line utility for users to change file permissions.

Concept tested. Linux file permissions

Reference. https://man7.org/linux/man-pages/man1/chmod.1.html

Topics

#file permissions#chmod command#Linux commands#basic file management

Community Discussion

No community discussion yet for this question.

Full LFCA Practice Browse All LFCA Questions