2023 Valid XK0-004 FREE EXAM DUMPS QUESTIONS & ANSWERS
Free XK0-004 Exam Braindumps CompTIA Pratice Exam
CompTIA XK0-004, also known as the CompTIA Linux+ Certification exam, is a highly popular certification exam that aims to test the knowledge and skills of individuals in the area of Linux system administration. Linux, being an open-source operating system, has become increasingly popular among businesses and individuals alike, and as such, the demand for skilled Linux professionals has never been higher.
NEW QUESTION # 196
A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.
Which of the following is the BEST command to do this?
- A. systemctl mask sendmail
- B. systemctl stop sendmail
- C. systemctl disable sendmail
- D. systemctl reset-failed sendmail
Answer: B
NEW QUESTION # 197
During the final step of staging new Linux hardware, GRUB2 is installed to the system drive. Which of the
following BEST describes the role of GRUB2 in a new Linux installation?
- A. It provides a method to partition a hard drive.
- B. It provides a method to pass parameters to the Linux kernel on startup.
- C. It provides a menu for creating administrator task shortcuts.
- D. It provides a menu for running special shell scripts.
Answer: D
Explanation:
Reference:
configuration/Working_with_the_GRUB_2_Boot_Loader/
NEW QUESTION # 198
A Linux administrator is checking connectivity between two servers in separate subnets:
Server A: 10.1.2.20 (source)
Server B: 10.2.1.10 (destination on port 8080)
The administrator tried to run the curl 10.2.1.10:8080 command on server A and received the following output:
curl: (7) Failed to connect to 10.2.1.10 port 8080: Connection refused.
The administrator checked on server B and confirmed nothing is listening on port 8080.
Which of the following commands, when run on server B, would have allowed the administrator to test the connection successfully?
- A. nc -l -p 8080 10.2.1.10
- B. ss -l -p dport=8080 dst 10.2.1.10
- C. nmap -v -p 8080 10.2.1.10
- D. tcpdump 'tcp port 8080'
Answer: C
NEW QUESTION # 199
An administrator needs to set the time of a VM that has no network connectivity to an NTP server. The VM's host, however, is synchronized with NTP.
Which of the following allows the administrator to synchronize the time of the VM with the host?
- A. time
- B. ntpdate
- C. date
- D. hwclock
Answer: D
NEW QUESTION # 200
Which of the following is commonly implemented in external devices to provide unique event-based two-factor authentication credentials when a system is already implementing username and password authentication?
- A. TACACS+
- B. PIN
- C. HOTP
- D. Biometrics
- E. LDAP
Answer: B
NEW QUESTION # 201
A virtual machine logs al limes using UTC The systems administrator would like to have one script that outputs times that are in the Amenca/Chicago time zone. Which of the following would the administrator MOST likely use in the script to accounts.
- A. hwclock --localtime >> -mylog.txt
- B. echo 'env TZ=America/Chicago date' >> mylog.-xt
- C. timedatect1 set-timezone "America/Chicago" $$ date >> mylog.txt
- D. date -d 'Tz="America/Chicago" now' >> mylog.txt
Answer: C
NEW QUESTION # 202
A systems administrator observes high latency values when reaching a remote web server. Which of the following commands will help determine and isolate issues on the network side?
- A. mtr
- B. route
- C. netstat
- D. dig
Answer: A
NEW QUESTION # 203
Joe, a user, reports that he is no longer able to write files to his home directory. Upon inspection, the Linux administrator discovers that attempting to create a new file gives the following error: No space left on device. However, the disk and partition are not full. Which of the following commands would be BEST for the administrator to use to continue troubleshooting this problem?
- A. rm -Rf ~/.*
- B. fdisk /dev/sda
- C. df -i
- D. fsck -y /dev/sda1
Answer: C
Explanation:
Explanation/Reference: https://www.linuxtechi.com/11-df-command-examples-in-linux/
NEW QUESTION # 204
A server is almost out of free memory and is becoming unresponsive. Which of the following sets of commands will BEST mitigate the issue?
- A. lsof, lvcreate, mdadm
- B. fdisk, mkswap, swapon -a
- C. free, fack, partprobe
- D. df, du, rmmod
Answer: C
Explanation:
Reference:
https://vitux.com/7-commands-to-check-swap-space-in-debian-10/
NEW QUESTION # 205
An administrator is provisioning and attaching a secondary disk to a Linux server as a data drive. Which Of the following commands the administrator use to find the UUID Of the disk so the drive can be mounted upon boot?
- A. blkid
- B. isblk
- C. 2label
- D. fstab
Answer: D
NEW QUESTION # 206
An administrator needs to see the type of CPU that a server is running. Which of the following files contains this information?
- A. /sys/dev/cpuinfo
- B. /proc/cpuinfo
- C. /etc/devices/info.conf
- D. /dev/proc/cpu
Answer: B
NEW QUESTION # 207
A junior systems administrator needs to schedule a backup script named /scripts/backup.sh and make the correct changes to the crontab.
Which of the following crontab entries would run the script every Monday at 2:05 a.m.?
- A. 5 2 * * 1 /scripts/backup.sh
- B. 1 * * 5 2 /scripts/backup.sh
- C. 1 * * 2 5 /scripts/backup.sh
- D. 2 5 * * 1 /scripts/backup.sh
- E. 5 2 * * 0 /scripts/backup.sh
Answer: A
NEW QUESTION # 208
A Linux administrator is testing a new web application on a local laptop and consistently shows the following
403 errors in the laptop's logs"
The web server starts properly, but an error is generated in the audit log. Which of the following settings should be enabled to prevent this audit message?
- A. httpd_can_network_connect = 1
- B. httpd_enable_scripting = 1
- C. httpd_enable_cgi = 1
- D. httpd_enable_homedirs = 1
Answer: A
NEW QUESTION # 209
The lead Linux has added a disk, /dev/sdd, to a VM that is running out of disk space. Place the following steps in the correct order from first (1) to last (4) to add the disk to the existing LVM.
Answer:
Explanation:
NEW QUESTION # 210
A systems administrator is required to allow only SSH access to the Linux servers from the 192.168.1.0/24 network. Which of the following iptables rules would accomplish this requirement?
- A. Option C
- B. Option A
- C. Option D
- D. Option B
Answer: D
NEW QUESTION # 211
A Linux administrator needs to switch from text mode to GUI.
Which of the following runlevels will start the GUI by default?
- A. Runlevel 3
- B. Runlevel 4
- C. Runlevel 5
- D. Runlevel 6
Answer: C
NEW QUESTION # 212
Which Of the following is a file that can define how to build, deploy, and install various components for a Linux application hosted in a cloud environment?
- A. OVF
- B. YAML
- C. Virsh
- D. VMM
Answer: C
NEW QUESTION # 213
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