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Total 260 Questions | Updated On: Nov 18, 2024

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Question 1

What is true regarding TCP port 23?

A : Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.

B : Port 23 is the well known port for the SSH service which provides secure logins.

C : Port 23 is the well known port for the rlogin service which is SSL secured by default.

D : Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.

Answer: A

Question 2

When the command echo $$ outputs 12942, what is the meaning of 12942?

A : It is the process ID of the echo command.

B : It is the process ID of the current shell.

C : It is the process ID of the last command executed.

D : It is the process ID of the last command which has been placed in the background.

Answer: B

Question 3

Which configuration file would be edited to change default options for the OpenSSH

server?

A : /etc/ssh/sshd_config

B : /etc/ssh/ssh

C : /etc/ssh/server

D : /etc/ssh/ssh_config

E : /etc/ssh/ssh_server

Answer: A

Question 4

Which of the following commands is used to change options and positional parameters for

a runningBash?

A : history

B : set

C : bashconf

D : setsh

E : envsetup

Answer: B

Question 5

Which of the following are requirements in order to run a shell script like a regular

command from anywhere in the filesystem? (Choose THREE correct answers.)

A : The user issuing the command must be in the group script.

B : The script file must be found in the $PATH.

C : The script file must have the executable permission bit set.

D : The script must begin with a shebang-line (#!) that points to the correct interpreter.

E : The file system on which the script resides must be mounted with the option scripts.

Answer: B,C,D

Page: 1 / 52

Total 260 Questions | Updated On: Nov 18, 2024

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