Free Lpi 102-500 Practice Exams - Page 8 of 11

Question #71

Which parameter is missing in the command

Ip link act ___ dec etho

To activate the previously inactive network interface ethO? (Specrfy the parameter only without any command, path or additional options)

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Question #72

What output is produced by the following command sequence?

echo ‘1 2 3 4 5 6’ | while read a b c; do

echo result $c $b $a;

done

A . result: 6 5 4
B . result: 1 2 3 4 5 6
C . result: 3 4 5 6 2 1
D . result: 6 5 4 3 2 1
E . result: 3 2 1

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Question #73

Which of the following tasks can the date command accomplish? (Choose two.)

A . Set the system’s date and time.
B . Set the system’s date but not the time.
C . Calculate the time span between two dates.
D . Print a calendar for a month or a year.
E . Display time in a specific format.

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Question #74

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

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Question #75

Which of the following statements is true if the UID of a regular user is identical to the GID of a group?

A . UID have precedence over GIDs, therefore the user is available while the group doesn’t.
B . The user as well as the group are not available to avoid ambiguity due to the ID conflict.
C . UIDs and GIDs are independent of each other, therefore the user as well as the group are still available.
D . The user is the only member of the group, even if the group configuration contains other members.
E . GIDs have precedence over UIDs, therefore the group is available while the user isn’t.

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Question #76

Which file is processed by newaliases? (Specify the full name of the file, including path.)

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Question #77

Which command, depending on its options, can display the open network connections, the routing tables, as well as network interface statistics. (Specify ONLY the command without any path or parameters.)

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Question #78

Which file, if present, must contain all users that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)

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Question #79

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.)

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Correct Answer: /etc/shadow

Explanation:

On a Linux system with shadow passwords enabled, the file that contains the password hashes of all local users is /etc/shadow. This file is a replacement for the password field in /etc/passwd, which is a world-readable file that contains basic information about users. The /etc/shadow file is not readable by regular users, and it stores the encrypted passwords (or hashes) of each user, along with other information such as password expiration dates, minimum and maximum password ages, and password warning periods. The /etc/shadow file has nine colon-delimited fields for each user: Username: The name used when the user logs into the system.

Password: The encrypted password of the user, or a special character that indicates the password status. For example, an asterisk (*) means the account is locked, and an exclamation mark (!) means the password is expired.

Last Password Change: The date of the last password change, expressed as the number of days since January 1, 1970.

Minimum Password Age: The minimum number of days required between password changes. A zero means the password can be changed anytime.

Maximum Password Age: The maximum number of days the password is valid. After this number of days, the password must be changed. A zero means the password never expires.

Password Warning Period: The number of days before the password expires that the user will be warned. A zero means no warning is given.

Password Inactivity Period: The number of days after the password expires that the account will be disabled. A negative value means the account is never disabled.

Account Expiration Date: The date when the account will be disabled, expressed as the number of days since January 1, 1970. A zero means the account never expires. Reserved Field: A field for future use.

The /etc/shadow file can be modified by using the commands passwd and chage, which are used to

change the password and the password aging information of a user, respectively. The /etc/shadow

file should not be edited directly, but always through the tools provided by the distribution. For more

details, see the shadow manual page.

Reference: LPIC-1 Exam 102 Objectives, Topic 110: Security, Subtopic 110.2: Use sudo to manage access to the root account, Weight: 2, Key Knowledge Areas: Configure sudo and sudoers. Use sudo to execute commands as another user.

LPIC-1 Exam 102 Learning Materials, Topic 110: Security, Subtopic 110.2: Use sudo to manage access

to the root account, Section 110.2.1: sudo and sudoers, Page 3-5.

Question #80

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)

A . 127.0.0.0/8
B . 10.0.0.0/8
C . 169.255.0.0/16
D . 172.16.0.0/12
E . 192.168.0.0/16

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