Commands Reference, Volume 1

chvfs Command

Purpose

Changes entries in the /etc/vfs file.

Syntax

chvfs VFSEntry

Description

The chvfs command changes /etc/vfs file entries by specifying the following fields within the VFSEntry parameter. The VFSEntry parameter is composed of the following fields: VFSName:VFSNumber:MountHelper:FileSystemHelper.

Any of the entries in the VFSEntry can be null (empty), with the exception of the VFSName field, and the corresponding value will not be changed. If all of the arguments are satisfactory, the entry in the /etc/vfs file is changed.

Parameters

VFSEntry	A string in the following format: VFSName:VFSNumber:MountHelper:FileSystemHelper
VFSName	Specifies the name of a virtual file system type.
VFSNumber	Specifies the virtual file system type's internal number as known by the kernel.
MountHelper	Specifies the name of the backend used to mount a file system of this type.
FileSystemHelper	Specifies the name of the backend used by certain file system specific commands to perform operations on a file system of this type.

Examples

To change the FileSystemHelper for the vfs entry named newvfs, enter:

chvfs "newvfs:::/etc/helper/testhelper"

The missing parameters are left unchanged.

Files

/etc/vfs

Contains descriptions of virtual file system types.

Related Information

The crvfs command, lsvfs command, mount command, and rmvfs command.

The File Systems in AIX 5L Version 5.2 System Management Concepts: Operating System and Devices explains file system types, management, structure, and maintenance.