Red Hat ENTERPRISE LINUX 5.5 - S 2010, Manual

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Chapter 2. New Packages
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x86-based systems users wanting to access DMI table data with Python- or XML-based tools should
install this new package which provides this capability.
2.8. RHEA-2010:0249: tunctl
A new package, tunctl, is now available for Red Hat Enterprise Linux 5.
tunctl is a tool to set up and maintain persistent Network Tunnel and Network Tap (TUN/TAP)
interfaces, enabling user applications access to the wire side of a virtual nework interface. Such
interfaces are useful for connecting VPN software, virtualization, emulation and a number of other
similar applications to the network stack.
* using tunctl a system administrator can create, configure and manage persistent TUN/TAP interfaces
for use by a designated user or group. This particular user or group can then open and use the
network-facing interface but can not alter any aspect of the host side of the interface. (
BZ#501574
9
)
Administrators wanting to enable persistent TUN/TAP interfaces and manage access to these
interfaces by uid, gid or both should install this new package.
2.9. RHEA-2010:0189: xz
A new package, xz, which provides user-space tools for compressing and decompressing files with the
LZMA algorithm, is now available.
XZ Utils is an integrated collection of user-space file compression utilities based on the Lempel-Ziv-
Markov chain-Algorithm (LZMA) compression algorithm. LZMA is a general purpose compression
algorithm designed by Igor Pavlov as part of 7-Zip. It provides high compression ratio while keeping
decompression times low.
The xz package includes liblzma, an LZMA library and API; xz, a shell tool for compressing files; and
xzdec, a shell tool for de-compressing files. The liblzma API is similar to zlib's and the behavior of
xz and xzdec will be familiar to users of gzip. Also, .xz files have similar properties to files produced
by gzip and bzip2, making them easy for users familiar with these tools to work with. The LZMA
algorithm, however, provides generally better compression ratios than these conventional tools.
(
BZ#519122
10
)
Anyone interested in taking advantage of this new compression utility should install this new package.
9
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=501574
10
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=519122