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CompTIA Linux+ XK0-005 New Questions

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Total 470 questions
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CompTIA Linux+ Exam Questions and Answers

Question 33

Users connecting to a MySQL database on a Linux system report frequent errors. An administrator reviews the following partial output of the /proc/meminfo and free commands:

total used free

Mem: 1011966 151930 860036

Swap: 1191972 1181716 10256

MemTotal: 1011966 kB

MemFree:

SwapTotal: 1191972 kB

SwapFree: 10256 kB

Which of the following should the administrator do to ensure that the MySQL service will continue to run even if the system runs out of swap space? (Select two.)

Options:

A.

Issue the sysctl -w vm.overcommit_ratio=100 command.

B.

Issue the sysctl -w vm.overconunit_memory=2 command. (Invalid key)

C.

Issue the dd if=/dev/zero of=/swapfile bs=1024 count=65536 command.

D.

Issue the mkswap /dev/sda2; swapon -v /dev/sda2 command.

E.

Reload the /etc/fstab file by issuing the mount -a command. (Not sufficient alone)

F.

Use disk quotas on the swap space to prevent MySQL from overutilizing the swap partition.

Question 34

A Linux systems administrator is working to obtain the installed kernel version of several hundred systems. Which of the following utilities should the administrator use for this task?

Options:

A.

Ansible

B.

Git

C.

Docker

D.

Bash

Question 35

A newly hired Linux administrator needs to grant access to the Linux servers by generating a password-protected RSA key of 4096 bytes. Which of the following commands will accomplish this task?

Options:

A.

ssh-keygen -RPb 4096

B.

ssh-keygen -t rsa -b 4096

C.

ssh-keygen -k rsa -l 4096 -p

D.

ssh-keygen -t dsa -B 4096

Question 36

A systems administrator receives the following errors via email from the system log:

go

XFS (loop0): Metadata CRC error detected at xfs_agi_read_verify+0xcb/0xfe

XFS (loop0): First 128 bytes of corrupted metadata buffer

XFS (loop0): metadata I/O error in "xfs_trans_read_buf_map" at daddr 0x2 len 1 error 74

A few minutes later, the administrator starts receiving reports that some of the images in the company's website are not loading properly. The systems administrator runs some commands and receives the following outputs:

css

Output 1

NAME FSTYPE UUID MOUNTPOINT

sda ext4 02ae47-fe457-45bc /

sdb xfs 347c7056 /var/www/html

Output 2

DocumentRoot "/var/www/html"

Output 3

httpd.service - The Apache HTTP Server

Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)

Active: active (running) since Sun 1991-05-24 16:12:43 UTC; 30y ago

Main PID: 252 (httpd)

Which of the following would be the appropriate steps to take to solve this issue?

Options:

A.

systemctl stop httpd umount /dev/sdb1 xfs_repair /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

B.

umount /dev/sdb1 xfs_repair /dev/sdb1 xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl restart httpd

C.

umount /dev/sdb1 systemctl stop httpd xfs_metadump /dev/sdb1 mount /dev/sdb1 /var/www/html systemctl start httpd

D.

systemctl stop httpd xfs_check -L /dev/sdb umount /var/www/html systemctl start httpd

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