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XK0-004 Exam Dumps - CompTIA Linux+ Certification Exam

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Question # 25

A systems administrator received a request to change the hostname to a new name. Which of the following file

configurations should be changed to fix the hostname in the server?

A.

/etc/sysconfig/network

B.

/etc/hosts

C.

/etc/resolv.conf

D.

/etc/sysconfig/nsswitch.conf

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Question # 26

An administrator is troubleshooting to determine why backups are failing on a particular server. The administrator runs the ps command and analyzes the following output.

The administrator runs kill -9 10112 yet the process remains.

Which of the following BEST describes the issue and how to fix it?

A.

The backup process is still running and needs to be killed with kill -9 --force 10112.

B.

The backup process is a zombie process, and the system needs to be rebooted.

C.

The backup process is out of memory, and more memory needs to be added to the system.

D.

The backup process is using 100% of system resources and needs to be rescheduled with renice.

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Question # 27

Due to security policies, a restriction was implemented that forbids direct access to the database server. The

junior administrator needs to connect using SSH tunneling. Which of the following commands allows the junior

administrator to connect from a desktop?

A.

ssh –L dbserver.local:5432:localhost:95432 postgres@dbserver.local

B.

ssh –L 5432:localhost dbserver.local:5432 postgres

C.

ssh –L 95432:localhost postgres@dbserver.local

D.

ssh –L 9432:localhost:5432 postgres@dbserver.local

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Question # 28

An administrator completed the configuration of the in-addr.arpa zone files for an organization.

Which of the following commands should the administrator use to verify the configuration is working as expected?

A.

ping -n 192.168.1.100

B.

host in-add.arpa

C.

dig -x 192.168.1.100

D.

nslookup in-addr.arpa

E.

tracepath -n 192.168.1.100

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Question # 29

A Linux administrator recently reprovisioned a new corporate web server to replace a legacy one. To minimize

the impact on the company's users, the administrator modified the network and DNS settings of the new server

to be the same as the legacy server.

When attempting to log in to the new server remotely over SSH, the following error message is displayed:

WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

Which of the following should the administrator do to resolve the issue?

A.

Restart the network services on both the remote server and the local machine.

B.

Remove the entry for the web server from the known_hosts file on the local machine.

C.

Update the /etc/hosts file on the remote server and local machine.

D.

Add the administrator's public key to the authorized_keys on the remote server.

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Question # 30

A systems administrator logs into a Linux server and must identify whether the server is a physical or virtual machine.

Which of the following commands should the administrator run?

A.

vmstat

B.

cat /proc/cpuinfo

C.

dmidecode

D.

modinfo

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Question # 31

Which of the following servers provides encrypted tunnel SOCKS services?

A.

SNMP

B.

VPN

C.

CA

D.

SSH

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Question # 32

A systems administrator notices several intensive tasks executing from users Joe and Ann. These processes

are impacting server operations but must be allowed to continue running.

Which of the following commands should the systems administrator run to reduce the impact on the server?

A.

pkill -u joe ann

B.

renice 11 -u joe ann

C.

nohup -u joe ann

D.

strace -u joe ann

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