Installation guide

Technology Previews

For more information about T10, refer to http://www.t10.org.

ext4

The latest generation of the ext filesystem, ext4, is available in this release as a Technology

Preview. Ext4 is an incremental improvement on the ext3 file system developed by Red Hat

and the Linux community. The release name of the file system for the Technology Preview is

ext4dev.

The file system is provided by the ext4dev.ko kernel module, and a new e4fsprogs package,

which contains updated versions of the familiar e2fsprogs administrative tools for use with ext4. To

use, install e4fsprogs and then use commands like mkfs.ext4dev from the e4fsprogs program

to create an ext4-base file system. When referring to the filesystem on a mount commandline or

fstab file, use the filesystem name ext4dev.

FreeIPMI

FreeIPMI is now included in this update as a Technology Preview. FreeIPMI is a collection of

Intelligent Platform Management IPMI system software. It provides in-band and out-of-band

software, along with a development library conforming to the Intelligent Platform Management

Interface (IPMI v1.5 and v2.0) standards.

For more information about FreeIPMI, refer to http://www.gnu.org/software/freeipmi/

TrouSerS and tpm-tools

TrouSerS and tpm-tools are included in this release to enable use of Trusted Platform Module

(TPM) hardware.TPM hardware features include (among others):

• Creation, storage, and use of RSA keys securely (without being exposed in memory)

• Verification of a platform's software state using cryptographic hashes

TrouSerS is an implementation of the Trusted Computing Group's Software Stack (TSS)

specification. You can use TrouSerS to write applications that make use of TPM hardware. tpm-

tools is a suite of tools used to manage and utilize TPM hardware.

For more information about TrouSerS, refer to http://trousers.sourceforge.net/.

eCryptfs

eCryptfs is a stacked cryptographic file system for Linux. It mounts on individual directories in

existing mounted lower file systems such as EXT3; there is no need to change existing partitions

or file systems in order to start using eCryptfs.

With this release, eCryptfs has been re-based to upstream version 56, which provides several

bug fixes and enhancements. In addition, this update provides a graphical program to help

configure eCryptfs (ecryptfs-mount-helper-gui).

This update also changes the syntax of certain eCryptfs mount options. If you choose to update to

this version of eCryptfs, you should update any affected mount scripts and /etc/fstab entries.

For information about these changes, refer to man ecryptfs.

The following caveats apply to this release of eCryptfs:

• Note that the eCryptfs file system will only work properly if the encrypted file system is mounted

once over the underlying directory of the same name. For example: