Which of the following options can be used with the usermod command to unlock a user's password?Select one:a.-Lb.-Nc.-gd.-U

To unlock a user's password using the usermod command in Linux, the correct option is:

d. -U

Explanation:

The usermod command is used for modifying user accounts. When you use the -U option, it unlocks the password of the specified user account that may have been locked by previous commands. Here’s a brief on the other options for clarity:

1. -L: This option is used to lock a user's password.
2. -N: This option is for setting a user’s password to an empty string, not specifically for unlocking.
3. -g: This option is used to change the primary group of the user, not related to password management.

Thus, the answer is -U which is the right choice to unlock a user's password.