Administrator's Guide

• A file or files were placed in a directory that now has a file system mounted to it.
The files still exist but are not accessible. Unmount the file system to access the files.
• The file protection or ownership is preventing access. Use the chmod or chown
command to change file permissions.
5.2 Setting Access Control Lists
Access control lists (ACLs) offer a finer degree of file protection than traditional file access
permissions. Use ACLs to allow or restrict file access to individual users unrelated to the
group they belong to. Only the owner of a file, or a user with the appropriate privileges
can create ACLs.
Both the Journaled File System (JFS) and High-Performance File System (HFS) support
ACLs but they use different mechanisms and syntax.
JFS is the HP-UX implementation of the Veritas journaled file system (VxFS). HFS is the
HP-UX version of the UNIX File System (UFS) and is compatible with earlier versions of
HP-UX.
An access control list (ACL) is a set of user, group, and mode entries associated with a
file. The list specifies permissions for all possible user ID and group ID combinations.
Access control lists give you a more precise way to control access to files than you have
with traditional UNIX file permissions. ACLs enable you to grant or restrict file access in
terms of individual users and specific groups, in addition to the traditional control.
Both HFS and JFS file systems support ACLs, but they use different mechanisms and use
different syntax.
NOTE: HFS is now deprecated. It will be removed from the operating system in a future
release.
HP-UX supports two separate JFS products: the basic JFS product, which is included in
the operating system, and the optional advanced product, OnLineJFS, which is installed
separately. Both JFS products support ACLs.
For more information, see setacl(1), getacl(1), aclv(5), chacl(1), lsacl(1), and acl(5).
5.3 Using HFS ACLs
You set HFS ACL permissions with the chacl command and display them with the lsacl
command. See Example 5-1.
5.2 Setting Access Control Lists 91