Linux Foundation LFCS Exam Practice Test Instant Access

Question 1

Given a file called birthdays containing lines like:

YYYY-MM-DD Name

1983-06-02 Tim

1995-12-17 Sue

Which command would you use to output the lines belonging to all people listed whose birthday is in May or June?

Agrep '[56]' birthdays

Bgrep 05?6? birthdays

Cgrep '[0-9]*-0[56]-' birthdays

Dgrep 06 birthdays | grep 05

Answer : C

Question 2

Which of the following commands connects to the remote host example.com which has OpenSSH listening on TCP port 2222? (Choose TWO correct answers.)

Assh --port 2222 example.com

Bssh -p 2222 example.com

Cssh -o Port=2222 example.com

Dssh -o GatewayPort=2222 example.com

Essh example.com:2222

Answer : B, C

Question 3

On a Linux system with shadow passwords enabled, which file in the file system contains the password hashes of all local users? (Specify the full name of the file, including path.)

See Below Explanation:

Answer : A

Question 4

Which of the following commands can be used to limit the amount of memory a user may use?

Aumask

Busermod

Culimit

Dpasswd

Echage

Answer : C

Question 5

What is a purpose of an SSH host key?

AIt must be sent by any SSH client in addition to a user key in order to identify the client's host.

BIt provides the server's identity information to connecting SSH clients.

CIt is the root key by which all user SSH keys must be signed.

DIt authenticates any user that logs into a remote machine from the key's host.

EIt is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.

Answer : B

Question 6

Which configuration file would be edited to change the default options for outbound SSH sessions?

A/etc/ssh/sshd_config

B/etc/ssh/ssh

C/etc/ssh/client

D/etc/ssh/ssh_config

E/etc/ssh/ssh_client

Answer : D

Question 7

The presence of what file will temporarily prevent all users except root from logging into the system? (Specify the full name of the file, including path.)

See Below Explanation:

Answer : A

Linux Foundation CERTIFIED SYSTEM ADMINISTRATOR Exam Practice Test