CompTIA Linux+ XK0-006 Dumps in PDF

Free CompTIA XK0-006 Real Questions (page: 19)

A systems administrator manages multiple Linux servers and needs to set up a reliable and secure way to handle the complexity of managing event records on the OS and application levels. Which of the following should the administrator do?

  1. Create an automated process to retrieve logs from the server by demand.
  2. Implement a centralized log aggregation solution.
  3. Configure daily automatic backups of logs to remote storage.
  4. Deploy log rotation procedures to manage the records.

Answer(s): B

Explanation:

A centralized log aggregation solution (such as Elasticsearch, Graylog, or Splunk) provides reliable and secure management of logs across multiple servers. It consolidates OS and application logs, simplifies analysis, and improves monitoring and security compared to on-demand retrieval, backups, or simple log rotation.



Which of the following best describes the role of initrd?

  1. It is required to connect to the system via SSH.
  2. It contains basic kernel modules and drivers required to start the system.
  3. It contains trusted certificates and secret keys of the system.
  4. It is required to initialize a random device within a Linux system.

Answer(s): B

Explanation:

initrd (initial ramdisk) provides essential kernel modules and drivers (e.g., for storage and filesystems) needed during the early boot process before the root filesystem is mounted.



A Linux systems administrator is running an important maintenance task that consumes a large amount of CPU, causing other applications to slow. Which of the following actions should the administrator take to help alleviate the issue?

  1. Increase the available CPU time with pidstat.
  2. Lower the priority of the maintenance task with renice.
  3. Run the maintenance task with nohup.
  4. Execute the other applications with the bg utility.

Answer(s): B

Explanation:

The renice command adjusts the priority of a running process. By lowering the maintenance task's priority, the scheduler allocates more CPU time to other applications, reducing their slowdown.



Which of the following is a protocol for accessing distributed directory services containing a hierarchy of users, groups, machines, and organization units?

  1. SMB
  2. TLS
  3. LDAP
  4. KRB-5

Answer(s): C

Explanation:

LDAP (Lightweight Directory Access Protocol) is specifically designed for accessing and maintaining distributed directory services that organize users, groups, computers, and organizational units in a hierarchical structure.



A systems administrator attempts to edit a file as root, but receives the following error:



Which of the following commands allows the administrator to edit the file?

  1. chown root /etc/resolv.conf
  2. chattr -i /etc/resolv.conf
  3. chmod 750 /etc/resolv.conf
  4. chgrp root /etc/resolv.conf

Answer(s): B

Explanation:

The lsattr output shows the immutable (i) attribute set on /etc/resolv.conf. This prevents any modifications, even by root. Running chattr -i removes the immutable flag, allowing the administrator to edit the file.



A systems administrator is having issues with a third-party API endpoint. The administrator receives the following output:



Which of the following actions should the administrator take to resolve the issue?

  1. Open a secure port in the server's firewall.
  2. Request a new API endpoint from a third party.
  3. Review and fix the DNS client configuration file.
  4. Enable internet connectivity on the host.

Answer(s): C

Explanation:

The dig comptia.com output shows NXDOMAIN and that the query is being sent to 10.255.255.254, which is not a valid DNS server. This indicates a misconfigured DNS client configuration (e.g., /etc/resolv.conf). Fixing the DNS settings will allow proper hostname resolution.



Which of the following commands should an administrator use to see a full hardware inventory of a Linux system?

  1. dmidecode
  2. lsmod
  3. dmesg
  4. lscpu

Answer(s): A

Explanation:

dmidecode retrieves detailed hardware information from the system's DMI/SMBIOS, including BIOS, CPU, memory, and motherboard details, providing a full hardware inventory.



A Linux administrator needs to analyze a compromised disk for traces of malware. To complete the analysis, the administrator wants to make an exact, block-level copy of the disk. Which of the following commands accomplishes this task?

  1. cp -rp /dev/sdc/* /tmp/image
  2. cpio -i /dev/sdc -ov /tmp/image
  3. tar cvzf /tmp/image /dev/sdc
  4. dd if=/dev/sdc of=/tmp/image bs=8192

Answer(s): D

Explanation:

The dd command performs a low-level, block-by-block copy of a device. Using if=/dev/sdc (input file) and of=/ tmp/image (output file) with a block size (bs) ensures an exact replica of the disk, suitable for forensic analysis.



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