010-160 Users and Group Management 5

Question 1

Which command creates a new group called 'devops' on a Linux system?

Accepted Answer

groupadd devops

Answer

groupadd devops is the standard command to create a new group entry in /etc/group.

Question 2

What does the 'last' command display?

Accepted Answer

A history of user login and logout events

Answer

The last command reads /var/log/wtmp and displays a list of all recent logins, logouts, and system reboots.

Question 3

A system administrator wants to rename the group 'oldteam' to 'newteam'. Which command achieves this?

Accepted Answer

groupmod -n newteam oldteam

Answer

groupmod -n sets a new name for an existing group, leaving the GID and members intact.

Question 4

What is the minimum number of fields in a valid /etc/passwd entry?

Accepted Answer

7

Answer

/etc/passwd has exactly 7 colon-separated fields: username, password, UID, GID, GECOS, home directory, and shell.

Question 5

Which command shows only the usernames of users currently logged into the system?

Accepted Answer

users

Answer

The users command prints a simple space-separated list of usernames of all currently logged-in users.

(010-160) LPI Linux Essentials Practice Test