Topic: acl

• File permission models compared: POSIX bits, POSIX ACLs, NFSv4/ZFS ACLs, NTFS and macOS ACLs

  POSIX mode bits, POSIX ACLs, the NFSv4/ZFS ACL model, NTFS ACLs and macOS ACLs each express access control differently, and almost none of it survives copying a file from one system to another. This reference lists the read/write commands for each and what gets silently dropped in transit.

  article · en · reviewed · knowledge as of 2026-09-24

Machine-readable: JSON