POSIX Access Control Lists (ACLs) are more fine-grained access rights for files and directories. An ACL consists of entries specifying access permissions on an associated object. ACLs can be configured per user, per group or via the effective rights mask.
These permissions apply to an individual user or a group, and use the same as rwx found in regular permissions.
For an explanation of rwx, see FilePermissions 继续阅读