Free CompTIA Linux+ (Plus) XK0-004 Exam Practice Test

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?

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

A systems administrator wants to mount an ISO to access its content. Using /mnt as a mount point, which ofthe following is the correct syntax?

• mount -o iso9660 /dev/sr0 /mnt
• mount -o loop -t iso /mnt
• mount -o loop /tmp/image.iso /mnt
• mount -o loop /dev/kvm /mnt

A Linux systems administrator is troubleshooting an issue with the /home directory running out of space. Theadministrator needs to determine which /home directories are using the most space. Which of the followingcommands should be used?

• du
• lvs
• df
• fsck

A technician wants to secure a sensitive workstation by ensuring network traffic is kept within the local subnet. To accomplish this task, the technician executes the following command:echo 0 > /proc/sys/net/ipv4/ip_default_ttlWhich of the following commands can the technician use to confirm the expected results? (Choose two.)

• tcpdump
• traceroute
• route
• iperf
• ip
• arp

A Linux administrator needs to configure a new firewall without an existing ACL to allow incoming web traffic.The firewall must log the allowed network traffic. Which of the following command sequences wouldaccomplish this task when they are executed in order?

• iptables --A INPUT --p tcp --dport 80 --J LOG iptables --A INPUT --p tcp --dport 443 --J LOG iptables --I INPUT --p tcp --dport 80 --J ACCEPT iptables --I INPUT --p tcp --dport 443 --J ACCEPT
• iptables --I INPUT --m multiport --p tcp --dports 80,443 --J LOG iptables --I INPUT --m multiport --p tcp --dports 80,443 --J ACCEPT
• iptables --A INPUT --m multiport --p tcp --dports 80,443 --J LOG iptables --A INPUT --m multiport --p tcp --dports 80,443 --J ACCEPT
• iptables --A INPUT --p tcp --dport 80 --J ACCEPT iptables --A INPUT --p tcp --dport 443 --J ACCEPT iptables --A INPUT --p tcp --dport 80 --J LOG iptables --A INPUT --p tcp --dport 443 --J LOG

Users in the sales department are unable to create new files in the shared directory /Sales. A junior Linuxadministrator determines the permissions on the /Sales directory are set to rwxr-----, and sales is thegroup owner of the directory.Which of the following is the BEST command for the junior administrator to issue to allow the users to createnew files?

• umask 002
• chmod 770 /Sales
• chmod g+s /Sales
• chmod 777 /Sales

Which of the following server roles would assign a host IP address?

• DHCP
• NTP
• DNS
• SSH

Which of the following commands would show the default printer on a Linux system?

• lpr
• lpq
• lpstat
• lspci

An administrator is trying to optimize a connection to an off-site NFS server.Which of the following commands would BEST display the problems with packet sizes between hops on the network?

• tracepath
• ping
• tracert
• nmap

A Linux administrator has downloaded and installed the httpd package.Which of the following commands will start the service immediately and allow the service to start on system boot?

• systemctl start httpd;chkconfig httpd on
• systemctl status httpd;chkconfig httpd on
• systemctl.start httpd;chkconfig httpd on
• systemctl start httpd;chkconfig httpd on 6