1500 Questions | Linux Essentials Certificate 2026

Basic Linux commands

User accounts and permissions

Core File Management (5%)

Navigation and the file system

File copy, move, and delete

Command Line and Desktop File Management (0-5%)

Core Data Management (5%)

Managing files and folders

Backup strategies

User Interfaces and Desktop Working Environments (5%)

Customization and configuration of desktop environments

Desktop environment shortcuts and settings

System Security (20%)

Secure shell and secure copy

Linux permissions and access control

B) info

C) man

D) doc

E) manual

F) guide

Correct Answer: C

Overall Explanation: The Linux manual pages are the built-in documentation system for commands, system calls, and configuration files. The man command is the standard utility used to access this documentation.

B is incorrect: While info does provide command documentation, it uses a different hyperlinked format (Texinfo) and is not the standard "manual pages" utility.

C is correct: man directly opens the system's manual pages for the specified command.

D is incorrect: doc is not a standard Linux command for viewing manuals.

E is incorrect: manual is not a valid Linux command; it is just a descriptive word.

F is incorrect: guide is not a standard system command in Linux.

B) rm

C) mv

D) rmdir

E) move

F) rn

Correct Answer: C

Overall Explanation: File management requires knowing the precise utilities for copying, moving, and removing data. Moving a file relocates it entirely, which is handled by the mv (move) command.

B is incorrect: rm removes (deletes) the file entirely.

C is correct: mv stands for move. It relocates the file from the source directory to the destination directory.

D is incorrect: rmdir is strictly used for removing empty directories, not moving files.

E is incorrect: move is a valid command in Windows DOS/Command Prompt, but it is not a standard Linux command.

F is incorrect: rn is not a standard Linux command for file management.

B) /etc/group

C) /etc/shadow

D) /var/log/auth.log

E) /etc/security

F) /etc/passwords

Correct Answer: C

Overall Explanation: System security relies on keeping sensitive authentication data hidden from standard users. Modern Linux systems separate user account information from the actual encrypted passwords to enhance security.

B is incorrect: /etc/group defines the groups on the system and their members, not user passwords.

C is correct: /etc/shadow contains the actual hashed passwords and password aging information. It is heavily restricted and only readable by the root user.

D is incorrect: /var/log/auth.log is a log file that tracks authentication events (like logins), not the storage location for user passwords.

E is incorrect: /etc/security is a directory for PAM (Pluggable Authentication Modules) configurations, not a file holding local passwords.

F is incorrect: /etc/passwords does not exist as a standard file in Linux distributions.

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