Free CompTIA Linux+ Certification Exam XK0-005 Exam Practice Test

A Linux administrator reviews a set of log output files and needs to identify files that contain any occurrence of the word denied. All log files containing entries in uppercase or lowercase letters should be included in the list. Which of the following commands should the administrator use to accomplish this task?

• find . -type f -print | xrags grep -ln denied
• find . -type f -print | xrags grep -nv denied
• find . -type f -print | xrags grep -wL denied
• find . -type f -print | xrags grep -li denied

A Linux administrator needs to redirect all HTTP traffic temporarily to the new proxy server 192.0.2.25 on port 3128. Which of the following commands will accomplish this task?

• iptables -t nat -D PREROUTING -p tcp --sport 80 -j DNAT - -to-destination 192.0.2.25:3128
• iptables -t nat -A PREROUTING -p top --dport 81 -j DNAT ---to-destination 192.0.2.25:3129
• iptables -t nat -I PREROUTING -p top --sport 80 -j DNAT ---to-destination 192.0.2.25:3129
• iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT ---to-destination 192.0.2.25:3128

A Linux system is failing to boot. The following error is displayed in the serial console:[[1;33mDEPEND[Om] Dependency failed for /data.[[1;33mDEPEND[Om] Dependency failed for Local File Systems...Welcome to emergency mode! After logging in, type 'journalctl -xb' to viewsystem logs, 'systemctl reboot' to reboot, 'systemctl default' to try again to boot into default mode.Give root password for maintenance(or type Control-D to continue}Which of the following files will need to be modified for this server to be able to boot again?

• /etc/mtab
• /dev/sda
• /etc/fstab
• /ete/grub.conf

A systems administrator is notified that the mysqld process stopped unexpectedly. The systems administrator issues the following command:sudo grep --i -r 'out of memory' /var/logThe output of the command shows the following:kernel: Out of memory: Kill process 9112 (mysqld) score 511 or sacrifice child.Which of the following commands should the systems administrator execute NEXT to troubleshoot this issue? (Select two).

• free -h
• nc -v 127.0.0.1 3306
• renice -15 $( pidof mysql )
• lsblk
• killall -15
• vmstat -a 1 4

A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots. Which of the following commands should be run on the DNS forwarder server to accomplish this task?

• ufw allow out dns
• systemctl reload firewalld
• iptables -A OUTPUT -p udp -ra udp -dport 53 -j ACCEPT
• flrewall-cmd --zone-public --add-port-53/udp --permanent

A Linux administrator was tasked with deleting all files and directories with names that are contained in the sobelete.txt file. Which of the following commands will accomplish this task?

• xargs -f cat toDelete.txt -rm
• rm -d -r -f toDelete.txt
• cat toDelete.txt | rm -frd
• cat toDelete.txt | xargs rm -rf

Which of the following technologies provides load balancing, encryption, and observability in containerized environments?

• Virtual private network
• Sidecar pod
• Overlay network
• Service mesh

A junior systems administrator has just generated public and private authentication keys for passwordless login. Which of the following files will be moved to the remote servers?

• id_dsa.pem
• id_rsa
• id_ecdsa
• id_rsa.pub

A Linux administrator wants to set the SUID of a file named dev_team.text with 744 access rights. Which of the following commands will achieve this goal?

• chmod 4744 dev_team.txt
• chmod 744 --setuid dev_team.txt
• chmod -c 744 dev_team.txt
• chmod -v 4744 --suid dev_team.txt

A systems administrator wants to test the route between IP address 10.0.2.15 and IP address 192.168.1.40. Which of the following commands will accomplish this task?

• route -e get to 192.168.1.40 from 10.0.2.15
• ip route get 192.163.1.40 from 10.0.2.15
• ip route 192.169.1.40 to 10.0.2.15
• route -n 192.168.1.40 from 10.0.2.15