acls what permissions are required to rename existing files

NVIDIA Omniverse™ permit restricting content access via its Permissions feature. Permissions are ACLs - or Access Control Lists.

ACLs tin can be used to make a project directory be attainable only to the team working on it and enable a user tin can protect his/her files from existence changed by other users - but still be visible/readable to those users.

Features¶

In that location are four unlike levels of admission:

• no access

• read - R

• write - Due west

• owner - O

These tin exist applied to both folders and files. Below tables outline what features these ACLs enable.

Admission Levels¶

Feature
Meet detail in directory listing
Read/Reference file contents
List file Checkpoints
Read/Reference file Checkpoints
Navigate into directory
Download particular
View permission
Add items to the directory
Modify file contents
Copy to i
Motility 1, 2
Rename one, 2
Delete 2
Change permissions

¹ These commands crave ACLs on both source and destination (if the activity would result in overwriting a file). Move and Rename require owner ACL on source considering the commands deletes the source. The command will fail when a destination does be and the user does not have the required ACL on the destination.

Feature	Minimum source ACL	Minimum destination ACL
Copy
Move
Rename

² For command to consummate it requires that ALL child items of a directory too provide possessor access. If user cannot delete a directory because he/she does not take recursive owner ACL and so another user with the necessary ACLs - or a user with an ADMIN account - should exist consulted.

Default ACLs¶

On initial server setup:

Directory	users	gm
Server root
Server root/Library
Server root/Projects
Server root/Users

On creation of user habitation directory:

Directory	users	user	gm
Server root/Users/[username]

Note that a user will need to change the users permission if he/she wants to share contents in home directory.

Nucleus assigns default ACLs to new directories and files. Annotation that the below mentioned gm group contains administrator user accounts.

Versions prior to Nucleus 2021.2.0

The creator of the item and the gm group are given OWNER ACL. The users grouping is given READ and WRITE ACLs.

Nucleus 2021.2.0

The creator of the item and the gm group are given OWNER ACL. users group is not added at all so group will inherit permissions from parent directory structure.

Operations & ACLs¶

Copy¶

ACLs are not copied from the source to the destination.

Move¶

ACLs are copied to the destination - even if the functioning overwrites an existing item.

Rename¶

ACLs are copied to the destination - even if the performance overwrites an existing item.

Inheritance¶

Permissions are inherited/recursive; meaning, if a directory item does not take an ACL specified for a user then the arrangement will expect upwardly in the parent directory structure until an ACL is defined for the given user - or a group the given user is in - and then apply that ACL on the directory detail.

In the below case Jane has created a projection directory structure. The Project - and all items below information technology - have the owner ACL assigned to gm and Jane. The Projection directory also have read ACL for users. Whatever user who is non in the gm grouping and is not Jane will exist only able to read the car.usd file because ACL inheritance applies the read ACL from the Project directory.

In the adjacent instance an ACL has been added to the Cars directory. A user in the users grouping now accept write access on that directory and the items below. The inheritance evaluation stops once information technology finds an ACL for the user trying to access an item. Therefore the read ACL on the Project directory is ignored for the Cars directory and its children.

User Groups¶

Many users can exist combined into groups by administrators (run across Grant Admin Access).

For larger teams it is easier to manage permissions past using groups rather than individual users. Every bit team memberships change over time the groups can be edited to reflect this change, thereby modifying access to directory items with set permissions.

Meet User Groups for more than on how user groups can exist managed.

Multi-ACL Evaluation¶

1 directory item can have many ACLs for a given user because ACLs tin can be associated with a user account and many groups at the same fourth dimension.

In the beneath example the ACL for Jane'southward Squad grants write access while the ACL for users only grants read access.

Nucleus permissions are resolved to the most permissive access given on an particular. This means that a user that is function of both Jane's Team and users will have write admission. A user that is merely part of users volition have read access.

Jane herself could be office of both the Jane'southward Team and users group. She will even so have owner access considering that is the most permissive ACL.

Denying Access¶

In social club to deny access the resolved ACL must exist resolved to non read, not write, and non possessor access. This can exist accomplished past adding an ACL for the users group where no items are checked.

In the below example the ACL for Jane's Team grants write access while the ACL for users restricts to no access.

A proficient workflow hither is to start with providing no access to the users group. Then add more permissive ACLs for smaller groups and/or individual users.

In contrast, the below instance would probably not create the desirable behavior. Users in Bob's Team volition nonetheless have read access because those users are too in the users group.

Assign Permissions¶

All administrators on the server - and any user that has the Owner ACL for a given directory detail - can alter permissions.

1. Select a directory or a file and click the Permissions tab in the item panel.

2. To add a permission, start typing the proper name of a user or a user group in the Assign user/group field. Select an item from the list and click the plus/add icon.

3. Edit the access level by selecting between R (Read), Due west (Write), or O (Owner). If no checkboxes are selected then a "No Admission" ACL is applied.

4. Remove a user/group by clicking the remove icon next to the item in the "Assigned users/groups" list.

The above instance will permit the "admin" and "gm" grouping Owner access. "My Team" users volition have Write access. All other users will have No Access ACL.

"Owner Takeover"¶

In this example Jane gave Bob the owner ACL of a sub directory in her project. Bob then inverse Jane's ACL to no access. At this signal Jane could non move, rename, or delete the Project or Props directories because she does not have recursive owner ACL. Even if Bob allowed Jane read or write access the motility, rename, and delete commands would not exist allowed for Jane.

Jane would need assistance from Bob someone with an ADMIN account to rectify the situation.

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Source: https://docs.omniverse.nvidia.com/prod_nucleus/prod_nucleus/usage/acls.html

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