What Certified XK0-004 Exam Topics Is

NEW QUESTION 1
A networked has been crashing intermittently. A Linux administrator would like to write a shell script that will attempt to ping the server and email an alert if the server fails to respond. The script will later be scheduled via cron job.
Which of the following scripts would BEST accomplish this task?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: D

NEW QUESTION 2
A Linux administrator needs to schedule a cron job to run at 1:15 p.m. every Friday to report the amount of free disk space on the system and to send the output to a file named “freespace”. Which of the following would meet this requirement?

• A. 13 15 * * 5 df > /freespace
• B. 15 13 * * 5 df > /freespace
• C. 15 1 * * 6 df > /freespace
• D. 15 13 6 * * df > /freespace

Answer: A

NEW QUESTION 3
An administrator receives a warning about a file system filling up, and then identifies a large file located at /tmp/largelogfile. The administrator deletes the file, but no space is recovered on the file system.
Which of the following commands would BEST assists the administrator in identifying the problem?

• A. lsof | grep largelogfile
• B. pkill /tmp/largelogfile
• C. pgrep largelogfile
• D. ps –ef | grep largelogfile

Answer: A

NEW QUESTION 4
After starting a long-running script, a systems administrator needs to verify the frequency of what is filling up the /var partition and kill it because it is consuming too much space.
Which of the following is the correct sequence given only a terminal is available?

• A. 1. CTRL-C2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-Z
• B. 1. CTRL-C2. fg3. watch df /var4. CTRL-Z5. bg6. CTRL-Z
• C. 1. CTRL-Z2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-C
• D. 1. CTRL-Z2. bg3. watch df /var4. CTRL-Z5. fg6. CTRL-C

Answer: D

NEW QUESTION 5
A junior systems administrator is upgrading a package that was installed on a Red Hat-based system. The administrator is tasked with the following:
Update and install the new package.
Verify the new package version is installed.
Which of the following should be done to BEST accomplish these task? (Choose two.)

• A. yum install <package name>
• B. yum upgrade
• C. rpm –e <package name>
• D. rpm –qa
• E. apt-get <package name>
• F. apt-get upgrade

Answer: AD

NEW QUESTION 6
Which of the following will provide a list of all flash, external, internal, and SSD drives?

• A. lspci
• B. lsmod
• C. lsblk
• D. lsusb

Answer: C

NEW QUESTION 7
An operator finds a user is having issues with opening certain files.
Which of the following commands would allow the security administrator to list and check the SELinux context?

• A. ls –D
• B. ls –a
• C. ls –Z
• D. ls -1

Answer: C

NEW QUESTION 8
A junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.
INSTRUCTIONS
Install Apache and start the service. Verify that the Apache service is running with the defaults. Typing “help” in the terminal will show a list of relevant commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button. CentOS Command Prompt

• A. Yes
• B. Not Mastered

Answer: A

NEW QUESTION 9
A junior Linux administrator is setting up system-wide configuration settings. The goal is to ensure the PATH environment variable includes the following locations for all users who log into a Linux system.

The administrator issues the following commands at the terminal:

Respectively, the output of these commands is as follows:

Given this output, which of the following would be the BEST action for the administrator to perform to address this issue?

• A. Update the /etc/profile.d file using a text editor, navigate to the PATH element add the missing locations, and run the bash_completion.sh script to update the changes.
• B. Update the /etc/profile file using a text editor, navigate to the PATH element, add the missing locations and run the . /etc/profile command to update the changes.
• C. Update the /etc/profile.d file using a text editor, navigate to the PATH element, add the missing locations, and reboot to update the changes.
• D. Update the /etc/profile file using a text editor navigate to the PATH element, add the missing locations, and restart the bash process to update the changes.

Answer: B

NEW QUESTION 10
A Linux administrator has configured a Linux system to be used as a router. The administrator confirms that two network adapters are properly installed and functioning correctly. In addition, the output of the iptables –L command appears to contain a complete firewall configuration.
Which of the following commands does the administrator need to issue for the router to be fully functional?

• A. echo “1” > /proc/sys/net/ipv4/ip_forward
• B. echo “0” > /proc/sys/net/ipv4/tcp_abort_on_overflow
• C. echo “0” > /proc/sys/net/ipv4/max_connections
• D. echo “1” > /proc/sys/net/ipv4/ip_default_ttl

Answer: A

NEW QUESTION 11
An administrator needs to change the IP address on a server remotely. After updating the configuration files, a network restart is needed. However, the administrator fears that when the network connection drops, the network restart script will be killed before the new IP address has been set.
Which of the following commands would prevent the script from being killed?

• A. nohup service network restart
• B. service network restart &
• C. echo “service network restart” | at now
• D. dg service network restart

Answer: A

NEW QUESTION 12
An analyst is trying to determine which public IP addresses are managed by Company A, but the script is not working correctly.

Which of the following explains what is wrong with the script?

• A. $(cat ip-list.txt) should be changed to `cat ip-list.txt` in the for statement.
• B. The for should be changed to while in the loop.
• C. The > should be changed to 2> in the do statement.
• D. The -ne flag should be changed to -eq in the if statement.

Answer: A

NEW QUESTION 13
Which of the following are Linux desktop managers? (Choose two.)

• A. KDE
• B. GNOME
• C. GUI
• D. VNC
• E. X11
• F. SPICE

Answer: AB

NEW QUESTION 14
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. dig
• C. netstat
• D. route

Answer: A

NEW QUESTION 15
A user has connected a Bluetooth mouse to a computer, but it is not working properly. Which of the following commands should the systems administrator use to fix the issue?

• A. lsmod –i bluetooth
• B. insmod bluetooth
• C. modprobe –r bluetooth
• D. depmod –i bluetooth

Answer: C

NEW QUESTION 16
A four-drive Linux NAS has been improperly configured. Each drive has a capacity of 6TB, for a total storage capacity of 24TB. To reconfigure this unit to be not pluggable for drive replacement and provide total storage of 11TB to 12TB, which of the following would be the correct RAID configuration?
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• A. RAID 01
• B. RAID 03
• C. RAID 10
• D. RAID 50

Answer: C

NEW QUESTION 17
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