XK0-004無料問題集「CompTIA Linux+ Certification」

質問 1

A systems administrator receives a report that the web server is not running after a planned system reboot.
After starting the web server manually, which of the following commands should the administrator issue to ensure the web server starts at boot time?

（A）systemctl service on

（B）systemctl enable <name>.service

（C）systemctl on <name>.service

（D）systemctl service enable

正解：B 解答を投票する

質問 2

A junior Linux administrator needs to access production servers using a secure SSH protocol. Which of the following files should contain the public key to gain remote access to the server?

（A）/etc/authorized_keys

（B）~/.ssh/authorized_keys

（C）/etc/sshd/ssh.conf

（D）~/ssh/authorized-keys

正解：B 解答を投票する

質問 3

A Linux administrator needs to add some files in a directory to the Git repository but must exclude some local
.tmp files that are occasionally created by the scripts.
Which of the following is the BEST way to accomplish this task?

（A）git add -x .tmp *

（B）git rm .tmp

（C）rm -rf .tmp

（D）echo .tmp >> .gitignore

正解：D 解答を投票する

質問 4

A systems administrator wants to disable the Linux Kernel WatchDog Timer Driver for security purposes.
Which of the following will accomplish this task?

（A）Add watchdog=0 to the /etc/modprobe.conf file.

（B）Add blacklist watchdog to the /etc/modprobe.d/blacklist file.

（C）Rename the /etc/modprobe.d/watchdog file to watchdog.off instead.

（D）Remove the watchdog=1 from the /usr/modules/watchdog.conf file.

正解：B 解答を投票する

質問 5

A Linux administrator rs creating a VM to install a third-party tool for scanning me network. The vendor hat provided an OVA file for installing the software.
Which of the foiowing BEST descnoes the OVA file?

（A）Vendor planning and installation documentation guidance to prepare the installation

（B）Software installation media that will be mounted and installed using a kickstart file

（C）An application container that is self-contained and allows the vendor software to run anywhere

（D）A VM image that contains the prelnstalled and configured vendor software

正解：D 解答を投票する

質問 6

A systems administrator suspects a process with a PID of 2864 is consuming resources at an alarming rate.
The administrator uses the command renice -n -5 -p2864, but it does not solve the issue. Which of the following commands should the administrator execute to correct the issue?

（A）renice -n 10 -p 2864

（B）nice -n -5 -p 2864

（C）nice -n 5 -p 2864

（D）renice -n -10 -p 2864

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 7

A user is reporting unusual slowness when trying to transfer a large file to an NFS server from a workstation. The administrator runs tracepath and gets the following output:

Which of the following BEST describes the issue and a possible solution?

（A）There are dropped packets at an intermediate router. Work with the network team to correct the issue.

（B）There is latency on an intermediate router. Increase the path MTU to compensate.

（C）There is latency at the storage device. Work with the storage team to correct the issue.

（D）The path MTU is lower than the source MTU. Reduce the source MTU setting.

正解：D 解答を投票する

質問 8

A junior Linux administrator needs to create 16 empty files quickly that will contain sales information for each quarter for the past four years. Which of the following commands will meet this requirement?

（A）touch [2015,2016,2017,2018].[q1,q2,q3,q4]

（B）touch {2015.2016.2017.2018}.{q1.q2.q3.q4}

（C）touch {2015,2016,2017,2018}.{q1,q2,q3,q4}

（D）touch '2015,2016,2017,2018'.'q1,q2,q3,q4'

正解：D 解答を投票する

質問 9

An administrator is configuring a new Linux server and wants to boot the system to a file that was previously downloaded to locally install removable medi a. Which of the following boot options should the administrator choose?

（A）NFS

（B）HTTP

（C）ISO

（D）PXE

正解：C 解答を投票する

質問 10

A Linux administrator retrieved a repository of files from a Git server using git clone. The administrator wants to see if a configuration file was added to the repository. Which of the following Git arguments should be used to see the recent modifications?

（A）pull

（B）init

（C）log

（D）fetch

正解：A 解答を投票する

質問 11

A user created a report.sh script in the home directory.
When executing /home/user/report.sh the user receives the following error message:

The user executes the following diagnostic commands:

Which of the following is causing the error message?

（A）The server disk is full.

（B）The server configuration does not allow running binaries in user home directories.

（C）The user has exceeded the allowed disk usage in the home directory.

（D）SELinux is blocking the script.

正解：D 解答を投票する

質問 12

An administrator needs to copy files from a Samba share where the server name is accounting. local, the share is reports, and the username is admin. Assuming local directories exist, which of the following commands would connect to the share?

（A）Option E

（B）Option D

（C）Option B

（D）Option C

（E）Option A

正解：D 解答を投票する

質問 13

A systems administrator needs to write a script that performs unattended package upgrades. Which of the folowing flags should be used with either yum or apt to meet this goal?

（A）-d

（B）-q

（C）-y

（D）-u

正解：D 解答を投票する

質問 14

An analyst is trying to determine which public IP addresses are managed by Company A, but the script is not working correctly.

Which of the following explains what is wrong with the script?

（A）The > should be changed to 2> in the do statement.

（B）The for should be changed to while in the loop.

（C）$(cat ip-list.txt) should be changed to `cat ip-list.txt` in the for statement.

（D）The -ne flag should be changed to -eq in the if statement.

正解：D 解答を投票する

質問 15

A systems administrator is implementing disk quotas on /home. During the process, the administrator receives the following error:
Cannot find filesystem to check or filesystem not mounted with user quota option.
Which of the following is the correct order of steps the administrator should follow to resolve this error?

（A）1. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
2. Create the quota database files and generate the disk usage table.
3. Remount /home.
4. Assign user quota policies.

（B）1. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
2. Remount /home.
3. Create the quota database files and generate the disk usage table.
4. Assign user quota policies.

（C）1. Create the quota database files and generate the disk usage table.
2. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
3. Remount /home.
4. Assign user quota policies.

（D）1. Assign user quota policies.
2. Verify if /home has quotas enabled in /etc/fstab and, if not, enable it.
3. Create the quota database files and generate the disk usage table.
4. Remount /home.

正解：B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 16

An administrator has written the following Bash script:

All necessary files exist in the correct locations. However, when the administrator executes /home/user/test.sh the following error is received:
No such file or directory
Which of the following is the MOST likely cause of the error?

（A）Nslookup is not installed.

（B）The shebang points to the wrong path.

（C）The formatting of the file is incorrect.

（D）The script is not executable.

正解：B 解答を投票する

質問 17

A Linux administrator recently changed the IP addresses of all the web servers from 10.10.50.x to 10.10.100.x. The administrator needs to update the serverlist.txt file to reflect the change.
The file contains the following:
10:WebSvr01:10.10.50.21:Main
11:WebSvr02:10.10.50.22:Acconting
12:WebSvr03:10.10.50.23:Intranet
20:NFS01:10.10.20.21:FileServer
30:SMTP01:10.10.30.31:Email
Which of the following commands will change the IP addresses and update the files in place?

（A）sed -i 's|.50|.100|g' serverlist.txt

（B）sed 's|.50|.100|g' serverlist.txt

（C）sed -i 's|.50|.100|' serverlist.txt

（D）sed -g 's|.50|.100|a' serverlist.txt

正解：A 解答を投票する

XK0-004 無料問題集「CompTIA Linux+ Certification」

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