Chapter 3. Technology Previews
284
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:
mount -t ecryptfs /mnt/secret /mnt/secret
The secured portion of the file system should not be exposed, i.e. it should not be mounted to
other mount points, bind mounts, and the like.
•
eCryptfs
mounts on networked file systems (e.g. NFS, Samba) will not work properly.
• This version of the
eCryptfs
kernel driver requires updated userspace, which is provided by
ecryptfs-utils-56-4.el5
or newer.
For more information about
eCryptfs
, refer to
http://ecryptfs.sf.net
. You can also refer to
http://
ecryptfs.sourceforge.net/README
and
http://ecryptfs.sourceforge.net/ecryptfs-faq.html
for basic
setup information.
Stateless Linux
Stateless Linux is a new way of thinking about how a system should be run and managed,
designed to simplify provisioning and management of large numbers of systems by making them
easily replaceable. This is accomplished primarily by establishing prepared system images which
get replicated and managed across a large number of stateless systems, running the operating
system in a read-only manner (refer to
/etc/sysconfig/readonly-root
for more details).
In its current state of development, the Stateless features are subsets of the intended goals. As
such, the capability remains as Technology Preview.
Red Hat recommends that those interested in testing stateless code read the HOWTO at
http://
fedoraproject.org/wiki/StatelessLinux/HOWTO
and join
stateless-list@redhat.com
8
.
The enabling infrastructure pieces for Stateless Linux were originally introduced in Red Hat
Enterprise Linux 5.
AIGLX
AIGLX
is a Technology Preview feature of the otherwise fully supported X server. It aims to enable
GL-accelerated effects on a standard desktop. The project consists of the following:
• A lightly modified X server.
8
mailto:stateless-list@redhat.com
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