XK0-005試験無料問題集（759題）「CompTIA Linux+ Certification 認定」

出題：1

SIMULATION
Find the file named core and remove it from the system.
INSTRUCTIONS
Type "help" to display a list of available commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

正解：

Reference: https://www.cyberciti.biz/faq/linux-unix-how-to-find-and-remove-files/

出題：2

A junior systems administrator needs to make a packet capture file that will only capture HTTP protocol data to a file called test.pcap.
Which of the following commands would allow the administrator to accomplish this task?

A. tcpdump -i eth0 port 80 -r test.pcap

B. tcpdump -i eth0 port 80 -w test.pcap

C. netcat -p 80 -w test.pcap

D. tshark -r test.pcap -o http

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：3

A Linux administrator is running a script that runs a Java application but receives the following error:
Error: Java_Home is not set
Java is installed on the Linux server and java -version returns a value.
Which of the following should the administrator add to the script to resolve this issue?

A. Set JAVA_HOME -which java

B. Export Java_Home which java

C. Export PATH-$PATH: $JAVA_HOME

D. Echo `which java > $JAVA_HOME

正解：A 解答を投票する

出題：4

A corporate server security policy states, "Ensure password hashes are not readable by non- administrative users." The administrator should check the permissions on which of the following files to ensure the server satisfies this policy?

A. /etc/group

B. /etc/security/limits.conf

C. /etc/shadow

D. /etc/passwd

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：5

A Linux administrator is troubleshooting an SSHD issue on a server. Users are receiving error messages stating the connection is refused. Which of the following commands should be used to verify whether the service is listening?

A. route

B. ifconfig

C. nslookup

D. netstat

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：6

To harden one of the servers, an administrator needs to remove the possibility of remote administrative login via the SSH service. Which of the following should the administrator do?

A. Set PermitRootLogin to no in the /etc/ssh/sshd_config file.

B. Add the line DenyUsers root to the /etc/hosts.deny file.

C. Add the line account required pam_nologin. so to the /etc/pam.d/sshd file.

D. Set PubKeyAuthentication to no in the /etc/ssh/ssh_config file.

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：7

A systems administrator needs to connect to a remote Linux machine to run system updates from within a graphical interface. Which of the following should the administrator use?

A. Wayland

B. MATE

C. VNC

D. Unity

正解：C 解答を投票する

出題：8

A Linux administrator needs to back up the folder /usr/domain, and the output must be a gzip compressed tar.
Which of the following commands should be used?

A. tar -cv domain.tar.gz /usr/domain

B. tar -czvf domain.tar.gz /usr/domain

C. tar -cvf /usr/domain domain.tar.gz

D. tar -cxzv /usr/domain domain.tar.gz

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：9

An administrator needs a bootable USB for installing a new Linux machine. The administrator downloaded the image file and named it as Linux_OS.iso in the /tmp directory. Which of the following commands will accomplish that task?

A. dd in=/tmp/Linux_OS.iso out=/dev/sdb bs=512

B. dd input=/tmp/Linux_OS.iso of=/dev/sda bs=512

C. dd if=/tmp/Linux_OS.iso of=/dev/sda bs=512

D. dd if=/tmp/Linux_OS.iso out=/dev/sdb1 bs=512

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：10

An administrator needs to get network information from a group of statically assigned workstations before they are reconnected to the network. Which of the following should the administrator use to obtain this information?

A. ifcfg -s

B. ifname -s

C. ifcfg -a

D. ip show

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：11

The application team has reported latency issues that are causing the application to crash on the Linux server. The Linux administrator starts troubleshooting and receives the following output:

Which of the following commands will improve the latency issue?

A. # systemctl stop network
# ethtool -g eth0 512
# systemctl start network

B. # echo 'net.core.net_backlog = 5000000' >> /etc/sysctl.conf
# sysctl -p
# systemctl daemon-reload

C. # echo 'net.core.rmem_max = 12500000' >> /etc/sysctl.conf
# echo 'net.core.wmem_max = 12500000' >> /etc/sysctl.conf
# sysctl -p

D. # ifdown eth0
# ip link set dev eth0 mtu 800
# ifup eth0

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：12

A Linux administrator is checking connectivity between two servers in separate subnets:
Server A: 10.1.2.20 (source)
Server B: 10.2.1.10 (destination on port 8080)
The administrator tried to run the curl 10.2.1.10:8080command on server A and received the following output:
curl: (7) Failed to connect to 10.2.1.10 port 8080: Connection refused.
The administrator checked on server B and confirmed nothing is listening on port 8080.
Which of the following commands, when run on server B, would have allowed the administrator to test the connection successfully?

A. nc -l -p 8080 10.2.1.10

B. ss -l -p dport=8080 dst 10.2.1.10

C. tcpdump 'tcp port 8080'

D. nmap -v -p 8080 10.2.1.10

正解：D 解答を投票する

出題：13

Which of the following is the best tool for dynamic tuning of kernel parameters?

A. turbostat

B. tuned

C. tune2fs

D. tuned-adm

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：14

A system administrator has set up third-party log aggregation agents across several cloud instances. The systems administrator wants to create a dashboard of failed SSH attempts and the usernames used.
Which of the following files should be watched by the agents?

A. /var/log/kern.log

B. /etc/rsyslog.conf

C. /var/log/monitor

D. /var/log/audit/audit.log

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：15

An administrator is logged into a server remotely and wants to determine if the system is a VM.
Which of the following commands would assist with this?

A. ps

B. vmstat

C. top

D. dmesg

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：16

A Linux administrator suspects unauthorized users are attempting to log in to the Linux server remotely.
Which of the following should the administrator check FIRST?

A. /var/log/kern.log

B. /var/log/dmesg

C. /var/log/secure

D. /var/log/messages

正解：C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：17

Which of the following would significantly help to reduce data loss if more than one drive fails at the same time?

A. Load balancing

B. Server clustering

C. VDI

D. RAID

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：18

A systems administrator wants to check the log of changes made to a Git repository.
Which of the following commands can be used for this task?

A. git reflog

B. git commit log

C. git branch list

D. git push log

正解：A 解答を投票する

出題：19

Due to low disk space, a Linux administrator finding and removing all log files that were modified more than 180 days ago. Which of the following commands will accomplish this task?

A. find /var/log -type d -mtime +180 -print -exec rm {} \;

B. find /var/log -type f -mtime +180 -exec rm {} \

C. find /var/log -type f -modified +180 -rm

D. find /var/log -type c -atime +180 -remove

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

XK0-005試験無料問題集「CompTIA Linux+ Certification 認定」