nfsv4 aces/acls

Author: s-sajid-ali

docs/hpc/03_storage/08_sharing_data_on_hpc.md

@@ -3,10 +3,11 @@
 ## Introduction
 To share files on the cluster with other users, we recommend using NFSv4 Access Control Lists (ACL) for a user to share access to their data with others. NFSv4 ACL mechanism allows for fine-grained control access to any files by any users or groups of users. We discourage users from setting `777` permissions with `chmod`, because this can lead to data loss (by a malicious user or unintentionally, by accident).
 
-:::note
+:::info
 Torch supports NFSv4 ACLs rather than the POSIX ACLs supported by Greene! NFSv4 ACLs allow for more fine grained control when compared to POSIX ACLs.
 :::
 
+### Anatomy of an Access Control Entry
 An Access Control List is composed of Access Control Entries, each of which has the following structure:
 ```
 [type]:[flags]:[principal]:[permissions]
@@ -25,7 +26,7 @@ An Access Control List is composed of Access Control Entries, each of which has
      -   `X`: Execute, alias for `watTNcCy`
     the full set of permission entry types are listed below for reference. 
 
-
+### Creating and Applying ACLs
 The following commands are available:
 -   `nfs4_setfacl` to set ACEs
 -   `nfs4_editfacl` to edit ACEs