TOP VALID DUMPS XK0-005 PPT: COMPTIA LINUX+ CERTIFICATION EXAM - TRUSTABLE COMPTIA XK0-005 STUDY GUIDES

TOP Valid Dumps XK0-005 Ppt: CompTIA Linux+ Certification Exam - Trustable CompTIA XK0-005 Study Guides

TOP Valid Dumps XK0-005 Ppt: CompTIA Linux+ Certification Exam - Trustable CompTIA XK0-005 Study Guides

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CompTIA Linux+ Certification Exam Sample Questions (Q266-Q271):

NEW QUESTION # 266
A systems administrator is investigating why one of the servers has stopped connecting to the internet.

Which of the following is causing the issue?

  • A. Wired connection 1 is offline.
  • B. The DNS address has been commented out in the configuration file.
  • C. No default route is defined.
  • D. The search entry in the /etc/resolv.conf file is incorrect.

Answer: C

Explanation:
The issue is caused by the lack of a default route defined in the /etc/sysconfig/network-scripts/ifcfg-enp0s3 file. A default route is a special route that specifies where to send packets that do not match any other routes in the routing table. Without a default route, the server will not be able to communicate with hosts outside its local network. The default route is usually configured with the GATEWAY option in the network interface configuration file. For example, to set the default gateway to 192.168.1.1, the file should contain:
GATEWAY=192.168.1.1
The other options are not causing the issue. The DNS address is not commented out in the configuration file, it is specified with the DNS1 option. The search entry in the /etc/resolv.conf file is correct, it specifies the domain name to append to unqualified hostnames. Wired connection 1 is online, as indicated by the ONBOOT=yes option and the output of ip link show enp0s3 command. References: Configuring IP Networking with nmcli; Configuring IP Networking with ifcfg Files


NEW QUESTION # 267
A Linux system fails to start and delivers the following error message:

Which of the following commands can be used to address this issue?

  • A. mkfs.ext4 /dev/sda1
  • B. partprobe /dev/sda1
  • C. fdisk /dev/sda1
  • D. fsck.ext4 /dev/sda1

Answer: D

Explanation:
Explanation
The command fsck.ext4 /dev/sda1 can be used to address the issue. The issue is caused by a corrupted filesystem on the /dev/sda1 partition. The error message shows that the filesystem type is ext4 and the superblock is invalid. The command fsck.ext4 is a tool for checking and repairing ext4 filesystems. The command will scan the partition for errors and attempt to fix them. This command can resolve the issue and allow the system to start. The other options are incorrect because they either do not fix the filesystem (partprobe or fdisk) or destroy the data on the partition (mkfs.ext4). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, page 325.


NEW QUESTION # 268
Joe, a user, is unable to log in to the Linux system. Given the following output:

Which of the following commands would resolve the issue?

  • A. passwd -u joe
  • B. pam_tally2 -u joe -r
  • C. usermod -s /bin/bash joe
  • D. chage -E 90 joe

Answer: B

Explanation:
Explanation
The command pam_tally2 -u joe -r will resolve the issue of Joe being unable to log in to the Linux system.
The pam_tally2 command is a tool for managing the login counter for the PAM (Pluggable Authentication Modules) system. PAM is a framework for managing authentication and authorization on Linux systems.
PAM allows the administrator to define the rules and policies for accessing various system resources and services, such as login, sudo, ssh, or cron. PAM also supports different types of authentication methods, such as passwords, tokens, biometrics, or smart cards. PAM can be used to implement login restrictions, such as limiting the number of failed login attempts, locking the account after a certain number of failures, or enforcing a minimum or maximum time between login attempts. The pam_tally2 command can display, reset, or unlock the login counter for the users or hosts. The -u joe option specifies the user name that the command should apply to. The -r option resets the login counter for the user. The command pam_tally2 -u joe -r will reset the login counter for Joe, which will unlock his account and allow him to log in to the Linux system. This will resolve the issue of Joe being unable to log in to the Linux system. This is the correct command to use to resolve the issue. The other options are incorrect because they either do not unlock the account (usermod -s
/bin/bash joe or passwd -u joe) or do not affect the login counter (chage -E 90 joe). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 17: Implementing Basic Security, page 517.


NEW QUESTION # 269
A junior administrator is trying to set up a passwordless SSH connection to one of the servers. The administrator follows the instructions and puts the key in the authorized_key file at the server, but the administrator is still asked to provide a password during the connection.
Given the following output:

Which of the following commands would resolve the issue and allow an SSH connection to be established without a password?

  • A. mv .ssh/authorized_key .ssh/authorized_keys
  • B. chmod 600 mv .ssh/authorized_key
  • C. restorecon -rv .ssh/authorized_key
  • D. systemctl restart sshd.service

Answer: D


NEW QUESTION # 270
One leg of an LVM-mirrored volume failed due to the underlying physical volume, and a systems administrator is troubleshooting the issue. The following output has been provided:

Given this scenario, which of the following should the administrator do to recover this volume?

  • A. Recreate the logical volume.
  • B. Reboot the server. The volume will revert to stripe mode.
  • C. Reboot the server. The volume will automatically go back to linear mode.
  • D. Replace the failed drive and reconfigure the mirror.

Answer: D

Explanation:
The administrator should replace the failed drive and reconfigure the mirror to recover the volume. The LVM (Logical Volume Manager) is a tool for managing disk space on Linux systems. The LVM allows the administrator to create logical volumes that span across multiple physical volumes, such as hard disks or partitions. The LVM also supports different types of logical volumes, such as linear, striped, or mirrored. A mirrored logical volume is a type of logical volume that creates a copy of the data on another physical volume, providing redundancy and fault tolerance. The output shows that the logical volume is mirrored and that one leg of the mirror has failed due to the underlying physical volume. This means that one of the physical volumes that contains the data of the logical volume is damaged or missing. This can cause data loss and performance degradation. The administrator should replace the failed drive and reconfigure the mirror to recover the volume. The administrator should identify the failed physical volume by using commands such as pvdisplay, vgdisplay, or lvdisplay. The administrator should then remove the failed physical volume from the volume group by using the vgreduce command. The administrator should then install a new drive and create a new physical volume by using the pvcreate command. The administrator should then add the new physical volume to the volume group by using the vgextend command. The administrator should then reconfigure the mirror by using the lvconvert command. The administrator should replace the failed drive and reconfigure the mirror to recover the volume. This is the correct answer to the question. The other options are incorrect because they either do not recover the volume (reboot the server. The volume will automatically go back to linear mode or reboot the server. The volume will revert to stripe mode) or do not preserve the data of the volume (recreate the logical volume). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Storage, pages 333-334.


NEW QUESTION # 271
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