107.1 Manage User And Group Accounts And Related System Files

Question 1

Command that allows an ordinary user to delete a group.

Answer 1

sudo groupdel [group]

Question 2

List the members of the sales group.

Answer 2

getent group sales

Question 3

List all groups.

Answer 3

cat /etc/group

getent group | cut -d: -f1

Question 4

Argument that specifies the absolute path to the user’s home directory when adding a new user.

Answer 4

useradd -d [path] [name]

Question 5

useradd cannot be used to grant administrative privileges. (T/F)

Answer 5

True

Question 6

Command with argument to delete a user, remove their home directory and files, and mail.

Answer 6

userdel –remove

Question 7

Delete a user even if they are logged in.

Answer 7

userdel –force

Question 8

usermod can be used to:

Answer 8

1. add comments
2. modify or move the home directory
3. set account expiry
4. change the user’s primary group
5. add the user to additional groups
6. remove a user from a group
7. lock and unlock the user account
8. specify the user’s shell
9. set the user’s ID

Question 9

usermod cannot be used to:

Answer 9

1. delete any groups

2. change access permissions for a user

Question 10

Command to create a system group.

Answer 10

groupadd -r

Question 11

Commands that can be used to change a group’s password:

Answer 11

gpasswd, groupadd, groupmod

Question 12

groupmod does not do what?

Answer 12

Add users to a group.

Question 13

Command to change group ownership.

Answer 13

chgrp

Question 14

chgrp cannot change what?

Answer 14

The group password.

Question 15

Any user can run which command to see when their password will expire?

Answer 15

chage

Question 16

Path to file that defines all login configurations, including password age and length, user ID and group ID ranges, password encryption levels, permitted terminal types, and more.

Answer 16

/etc/login.defs

Question 17

Path to the text database that lists users.

Answer 17

/etc/passwd

Question 18

Path to directory that contains default template files and directories that are copied to a new user profile.

Answer 18

/etc/skel

Question 19

/etc/shadow contains:

Answer 19

1. the username (but not the full name)
2. the encrypted password
3. the number of days since January 1st 1970 that the password was last changed
4. the number of days before the password may be changed
5. the number of days before the password must be changed
6. when the account will be disabled after the password expires
7. the number of days since the account has been disabled

Question 20

/etc/group contains:

Answer 20

1. the group name
2. the group password
3. the group ID
4. list of member users