1. UIDs 1-500 are usually reserved for what kind of users?
- System accounts, such as server processes
- Are not used for user accounts, but for group accounts
- Log-in (human) users
- Remote log-in accounts
2. If a user is deleted, the files and directories that the user owned…
- …will show a UID as the owner, but not user name.
- …will have no UID owner.
- …are deleted as well.
- …will have no user owner.
3. Which of the following options for the useradd
command allows root to specify the UID to be associated with the account?
- -U
- -u
- -G
- -g
4. Which of the following options for the useradd
command allows root to specify supplementary groups the user will be a member of?
- -G
- -u
- U
- -g
5. On a system that does not use UPG, the useradd
command will also create a user group. For example, user bob, group bob. True or False?
- True
- False
6. The useradd
command will create a home directory by default for a user. True or False?
- True
- False
7. The usermod
command can be used to do all of the following except…
- …add a user to a supplementary group.
- …change the user’s MAX and MIN password settings.
- …change the user’s home directory.
- …change the user’s UID and GID.
8. Which of the following commands will add the group extra to the user bob’s secondary groups in addition to bob’s current secondary groups?
- usermod -G extra bob
- usermod -a extra bob
- usermod -aG extra bob
- usermod -ag bob extra
9. Which option for the usermod
command can be used to specify a user’s group ID (either primary or secondary)? (choose two)
- -g
- -G
- -s
- -S
10. For non-root users, the passwd command can only be used to change the password of the user running the command. True or False?
- True
- False
11. The userdel
command will…
- …delete the user account, but leave the user’s files by default.
- …will prompt before deleting each file owned by a user.
- …automatically delete a user and the user’s home directory and its contents.
- …automatically delete a user and all the files owned by that user.
12. The groupmod
command can be used to change a group name. True or False?
- True
- False
13. The groupmod
command can be used to change a group GID. True or False?
- True
- False
14. The groupmod
command can be used to add users to a group. True or False?
- True
- False
15. Which of the following commands can be used to modify a group?
- groupadd
- modgroup
- addgroup
- groupmod
16. Which command can be used to determine a user’s most recent log in?
- last
- history
- shell
- login
17. Which of the following files contains encrypted user password information?
- /etc/usr
- /etc/shadow
- /etc/passwd
- /etc/group
18. Which of the following files contains user IDs?
- /etc/group
- /etc/shadow
- /etc/usr
- /etc/passwd
19. Which of the following files does the groupadd command use to determine the new GID when a GID isn’t specified?
- /etc/shadow
- /etc/group
- /etc/passwd
- /etc/usr
20. Which of the following commands, run as root, will prevent the user bob from logging in?
- usermod -d bob
- usermod -l bob
- usermod -D bob
- usermod -L bob
21. What directory contains user’s home directories?
- /
- /home
- /rootfs
- /user
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