NCP Server for Linux enables you to create NCP volumes on top of Linux POSIX file systems such as Btrfs, Ext3, XFS, and Reiser file systems. This allows you to use the same method of file system trustees and trustee rights to control access to data on Linux POSIX file systems as you use on NSS volumes.
For information, see Managing NCP Volumes
in the OES 2018 SP2: NCP Server for Linux Administration Guide.