NEW QUESTION 1
A Linux systems administrator needs to copy the contents of a directory named “working” on the local working system to a folder /var/www/html on a server named “corporate-web”.
Which of the following commands will allow the administrator to copy all the contents to the web server?

• A. scp –r working/* webuser@corporate-web:/var/www/html
• B. tar working/* webuser@corporate-web:/var/www/html
• C. cp –r working/* webuser@corporate-web:/var/www/html
• D. mv working webuser@corporate-web:/var/www/html

Answer: A

NEW QUESTION 2
Joe, a user, is unable to log in to the server and contracts the systems administrator to look into the issue. The administrator examines the /etc/passwd file and discovers the following entry:
joe:x:505:505::/home/joe:/bin/false
Which of the following commands should the administrator execute to resolve the problem?

• A. usermod –s /bin/bash joe
• B. passwd –u joe
• C. useradd –s /bin/bash joe
• D. chage –E -1 joe

Answer: B

NEW QUESTION 3
A junior Linux administrator needs to ensure a service will start on system boot. Which of the following commands should be used to accomplish this task?

• A. chkconfig <service> on
• B. systemctl <service> bootup
• C. service <service> enable
• D. crontab install <service>

Answer: A

NEW QUESTION 4
An administrator is analyzing a Linux server which was recently hacked.
Which of the following will the administrator use to find all unsuccessful login attempts?

• A. nsswitch
• B. faillock
• C. pam_tally2
• D. passwd

Answer: C

NEW QUESTION 5
An administrator is troubleshooting an application that has failed to start after the server was rebooted. Noticing the data volume is not mounted, the administrator attempts to mount it and receives this error:

Upon checking the logical volume status, the administrator receives this information:

Which of the following can be said about the data logical volume, and how can this problem be resolved?

• A. The logical volume is not activ
• B. The administrator should make it active with lvchange -ay /dev/ datavg/datalv and then mount it.
• C. The logical volume file system has become corrupte
• D. The administrator should repair it with xfs_repair/dev/datavg/datalv and then mount it.
• E. The logical volume is OK but the /dev special files are missin
• F. The administrator should recreate them by running /dev/MAKEDEV.
• G. The file system is read-onl
• H. The administrator should remount it as read-write with the command mount - o remount.rw /data.

Answer: A

NEW QUESTION 6
Which of the following is the BEST reason for not storing database files in the /var directory?

• A. The /var filesystem is not fast enough for database files.
• B. The number of files in /var is limited by the available inodes.
• C. Files in /var do not have strict file permissions.
• D. If log files fill up /var, it might corrupt the database.

Answer: D

NEW QUESTION 7
An administrator needs to mount the shared NFS file system testhost:/testvolume to mount point /mnt/testvol and make the mount persistent after reboot.
Which of the following BEST demonstrates the commands necessary to accomplish this task?

• A.
• B.
• C.
• D.

Answer: C

NEW QUESTION 8
A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp directory and is getting the following error No space left on device. The support engineer checks the /tmp directory, and it has 20GB of free space.
Which of the following BEST describes a possible cause for this error?

• A. The /tmp directory is not mounted.
• B. The filesystem is formatted with a 4MB block size.
• C. the filesystem ran out of inodes.
• D. The /tmp directory has been set with an immutable attribute.

Answer: C

NEW QUESTION 9
A Linux systems administrator needs to set permissions on an application with the following parameters: The owner of the application should be able to read, write, and execute the application.
Members of the group should be able to read and execute the application. Everyone else should not have access to the application.
Which of the following commands would BEST accomplish these tasks?

• A. chmod 710 <application name>
• B. chmod 730 <application name>
• C. chmod 750 <application name>
• D. chmod 760 <application name>

Answer: D

NEW QUESTION 10
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 11
A Linux system is running normally when the systems administrator receives an alert that one application spawned many processes. The application is consuming a lot of memory, and it will soon cause the machine to become unresponsive. Which of the following commands will stop each application process?

• A. kill ‘pidof application’
• B. killall application
• C. kill -9 ‘ps –aux | grep application’
• D. pkill -9 application

Answer: B

NEW QUESTION 12
Which of the following BEST describes running on a Linux system?

• A. Containers only need the namespaces functionally to run on a Linux system available since kernel 2.6.
• B. Containers need a hypervisor to run a Linux syste
• C. Cgroups namespaces are functionalities used for the kernel but not for running containers.
• D. Containers only need the cgroups functionality for running on a Linux syste
• E. Namespaces is not a Linux kernel functionality needed for creating and managing containers.
• F. Containers use the cgroups and namespaces functionalities to isolate processes and assign hardware resources to each of those isolated processes.

Answer: D

NEW QUESTION 13
A systems administrator has received reports of intermittent network connectivity to a particular website. Which of the following is the BEST command to use to characterize the location and type of failure over the course of several minutes?

• A. mtr www.comptia.org
• B. tracert www.comptia.org
• C. ping www.comptia.org
• D. netstat www.comptia.org

Answer: B

NEW QUESTION 14
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 15
An engineer is working on a production application deployment that requires changing a web application property file called server.property that is managed by the Git version control system. A cloned copy of the remote repository in which the server.property file exists is on the local desktop computer. The engineer makes appropriate changes to the files, saves it as server.property, and executes git commit –m “changed the property file” server.property. Which of the following commands did the engineer fail to perform?

• A. git init server.property
• B. git merge server.property
• C. git add server.property
• D. git push server.property

Answer: D

NEW QUESTION 16
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