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New LPI 102-400 Exam Dumps Collection (Question 2 - Question 11)

Q1. What is true regarding the command sendmail?

A. With any MTA, the sendmail command must be run periodically by the cron daemon.

B. All MTAs, including Postfix and Exim, provide a sendmail command.

C. The sendmail command prints the MTAs queue history of which mails have been sent successfully.

D. It is only available when the sendmail MTA is installed.

Answer: B


Q2. What output will the following command sequence produce?

echo '1 2 3 4 5 6' | while read a b c; do echo result: $c $b $a;

done

A. result: 3 4 5 6 2 1

B. result: 1 2 3 4 5 6

C. result: 6 5 4

D. result: 6 5 4 3 2 1

E. result: 3 2 1

Answer: A


Q3. CORRECT TEXTWith IPv6, how many bits have been used for the interface identifier of an unicast address? (Specify the number using digits only.)

Answer: 64


Q4. To prevent a specific user from scheduling tasks with at, what should the administrator do?

A. Add the specific user to /etc/at.allow file.

B. Add the specific user to [deny] section in the /etc/atd.conf file.

C. Add the specific user to /etc/at.deny file.

D. Add the specific user to nojobs group.

E. Run the following: atd --deny [user].

Answer: C


Q5. CORRECT TEXTWhich environment variable should be set in order to change the time zone for the commands run from within the environment variable's scope? (Specify the variable name only.)

Answer: TZ


Q6. Which of the following commands can be used to limit the amount of memory a user may use?

A. umask

B. usermod

C. ulimit

D. passwd

E. chage

Answer: C


Q7. Which of the following commands puts the output of the command date into the shell variable mydate?

A. mydate="$(date)"

B. mydate="exec date"

C. mydate="$((date))"

D. mydate="date"

E. mydate="${date}"

Answer: A


Q8. CORRECT TEXTWhich command can be used to investigate the properties for a particular window in X by clicking that window? (Specify ONLY the command without any path or parameters.)

Answer: /usr/bin/xwininfo, xwininfo


Q9. CORRECT TEXTWhich command, available with all MTAs, is used to list the contents of the MTA's mail queue? (Specify ONLY the command without any path or parameters.)

Answer: mailq, /usr/bin/mailq, sendmail -bp, /usr/sbin/sendmail -bp, /usr/lib/sendmail -bp, sendmail, /usr/sbin/sendmail, /usr/lib/sendmail


Q10. What is the purpose of the command mailq?

A. It fetches new emails from a remote server using POP3 or IMAP.

B. It is a multi-user mailing list manager.

C. It is a proprietary tool contained only in the qmail MTA.

D. It queries the mail queue of the local MTA.

E. It is a command-line based tool for reading and writing emails.

Answer: D


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