NDG Linux Essentials -Ch 14

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System accounts, such as server processes

1. UIDs 1-500 are usually reserved for what kind of users?

delete the user account, but leave the user's files by default.

11. The userdel command will...

/etc/shadow

17. Which of the following files contains encrypted user password information?

will show a UID as the owner, but not user name

2. If a user is deleted, the files and directories that the user owned...

Usermod -L bob

20. Which of the following commands, run as root, will prevent the user bob from logging in?

/home

21. What directory contains user's home directories?

-u

3. Which of the following options for the useradd command allows root to specify the UID to be associated with the account?

-G

4. Which of the following options for the useradd allows root to specify supplementary groups the user will be a member of?

True

10. For non-root users, the passwd command can only be used to change the password of the user running the command.

True

12. The groupmod command can be used to change a group name.

True

13. The groupmod command can be used to change a group GID.

False

14. The groupmod command can be used to add users to a group.

Groupmod

15. Which of the following commands can be used to modify a group?

Last

16. Which command can be used to determine a user's most recent log in?

/etc/passwd

18. Which of the following files contains user IDs?

/etc/group

19. Which of the following files does the groupadd command use to determine the new GID when a GID isn't specified?

False

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

6. The useradd command will create a home directory by default for a user.

change the user's MAX and MIN password settings.

7. The usermod command can be used to do all of the following except...

Usermod -aG extra bob

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?

-g -G

9. Which option for the usermod command can be used to specify a user's group ID (either primary or secondary)? (choose two)


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