Ubuntukylin base Groupadd When you add a new user group, you are prompted not to lock etc Group

Town Yard text:
The Confucian School of the practical and practical, line Buddhism Purdue sentient beings, the monastic Kangsheng fidelity, understanding of the easy to change the image. To science and technology to shine a good law, the achievement of a conscience blog.
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My system: Ubuntukylin 16.04 LTS 64bit

STEP0:

Querying the owner and user group for a file

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Step1:

Use the CHGRP command to change the user group to which the specified file belongs.

But there is no such user group to create

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Step2:

Create a user group with Groupadd, an exception occurs

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Step3:

Sudo-s promote identity to root administrator

To create a user group

789 is the set of user group permissions that are made. No exception occurred after upgrading to root.

Changes the user group to which the specified file belongs.

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STEP4:

View the result of the modification

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Ubuntukylin base Groupadd When you add a new user group, you are prompted not to lock etc Group