SkillTestPro | CompTIA Linux+ Practice Test 8

CompTIA Linux+ Practice Test 8

CompTIA Linux+ Practice Test

1 / 10

A process with PID 2456 is consuming excessive CPU. Which command terminates it gracefully, allowing cleanup?

kill -9 2456

pkill -u 2456

stop 2456

kill -15 2456

killall 2456

2 / 10

A user accidentally deleted /etc/passwd. You have a backup at /backups/passwd.bak. Which command restores it?

mv /backups/passwd.bak /etc/passwd

cp -f /etc/passwd /backups/passwd.bak

restore /backups/passwd.bak /etc/passwd

cat /backups/passwd.bak > /etc/passwd.bak

ln -s /backups/passwd.bak /etc/passwd

3 / 10

A server’s disk is full, and you need to find the largest files in /var. Which command identifies them?

ls -lh /var

du -ah /var | sort -rh | head

find /var -type f

df -h /var

stat /var

4 / 10

A script, backup.sh, fails with a "permission denied" error when run by a user. The permissions are rw-r--r--. Which command makes it executable?

chmod +x backup.sh

chown root backup.sh

chmod 644 backup.sh

sudo backup.sh

chmod g+x backup.sh

5 / 10

A network interface, eth1, isn’t getting an IP address via DHCP after a reboot. Which command restarts the DHCP client to fix this?

ifconfig eth1 up

ip link set eth1 up

dhclient eth1

systemctl restart networking

nmcli con reload

6 / 10

A cron job scheduled with crontab -e to run daily at 3 AM isn’t executing. Which command helps diagnose the issue?

systemctl status cron

cat /etc/crontab

crontab -l

journalctl -u cron

ps aux | grep cron

7 / 10

A web server’s logs in /var/log/apache2 are growing uncontrollably, risking disk space issues. Which command rotates the logs to manage this?

*rm /var/log/apache2/log

cat /var/log/apache2/ > /dev/null*

*truncate -s 0 /var/log/apache2/log

logrotate -f /etc/logrotate.conf

*mv /var/log/apache2/log /tmp

8 / 10

After a power outage, a Linux server won’t boot, showing filesystem errors. Which command should you run in recovery mode to fix this?

mount -a

mkfs /dev/sda1

fdisk /dev/sda1

parted /dev/sda1

fsck /dev/sda1

9 / 10

A user reports they can’t write to a file they own, "report.txt," despite having read permission. The current permissions are rw-r--r--. Which command fixes this?

chown user report.txt

chmod u+w report.txt

chmod 644 report.txt

chgrp users report.txt

chmod o+w report.txt

10 / 10

A server’s SSH service stopped working after a configuration change. You suspect the port was altered. Which command checks the port SSH is listening on?

sshd -t

cat /etc/ssh/sshd_config

systemctl status sshd

netstat -tuln

ip addr show

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