CompTIA Updated XK0-005 Exam Questions and Answers by loki

The +t option sets the "sticky bit" on a directory, which restricts deletion or renaming of files in the directory to the file's owner or the root user. This is commonly used in shared directories like /tmp, where multiple users may have access, but only the file owner should be allowed to modify their own files. The command chmod +t /directory/ applies this permission.

Ansible is an open-source automation tool that can manage multiple systems simultaneously. Using an Ansible playbook, the administrator can run commands across several servers to obtain the installed kernel version efficiently. A simple ansible all -m command -a "uname -r" will retrieve the kernel version from all target systems.

The "Argument list too long" error occurs when the number of files exceeds the command-line argument limit. The find command with -exec is a workaround, as it processes files one by one, avoiding the argument limit. This method is efficient for handling large numbers of files.

Step-by-Step Comprehensive Detailed Explanation:

Command Explanation:

B: Logging into the server's physical console provides direct root access.

D: The su command allows switching to the root user if the password is known.

Why Other Options are Incorrect:

A: Passwordless SSH login does not provide administrative access.

C: Telnet is insecure and typically disabled on hardened systems.

E: Installing sudo requires administrative privileges.

F: Adding a user to the wheel group requires administrative privileges.

References:

CompTIA Linux+ Study Guide: User and Group Management

man su