XK0-005 Exam Results

The file command is used to determine the type of a file by examining its contents. It can recognize many different formats, such as text, binary, executable, compressed, image, audio, video, etc. It can also display some additional information about the file, such as encoding, size, dimensions, etc12

References: 1: file(1) - Linux manual page 2: How to use the file command in Linux

If the application server can ping the database server by its IP address but not by its hostname, it indicates a DNS resolution issue. The most likely cause is incorrect DNS server configuration. The engineer should verify the DNS settings in /etc/resolv.conf or the network configuration.

The -G wheel option adds the user joe to the wheel group, which is a special group that allows users to execute administrative commands using sudo. This is the correct way to create a user with administrative privileges in many Linux distributions, including Red Hat-based ones.

The /etc/sudoers file defines user privileges and access to root-level commands.

Option A (Correct): The administrator should grant sudo privileges by modifying /etc/sudoers using visudo.

Option B: /etc/login.defs controls system-wide authentication policies, not sudo access.

Option C: /etc/group manages group memberships but does not grant sudo access.

Option D: /etc/shadow stores password hashes, unrelated to sudo access.