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Source: developerWorks : Linux : Technical library XML provides a way to identify data items and subcomponents within any structured data set, but has its roots in documentation development and production. Robust, open standards for XML document markup and a rich set of freely available tools for XML document parsing and format conversion make it easy to install and configure a complete documentation development and formatting environment on any UNIX or Linux system.
Source: developerWorks : Linux : Technical library Are you part of a team that wants to get on the agile planning
bandwagon? Are you using iterative development and still stuck doing
"waterations"? In this article, the author puts his experience assisting
and teaching IBM product teams into a roadmap that
answers the question: "How do I start
developing releases with agile planning?" He covers the basics of agile
planning and shares his insights into what works and what doesn't. Editor's
note: Figures 1 and 4 were updated and other corrections were added at the author's
request.
Source: developerWorks : Linux : Technical library RPyC is a seamless library for integrating $@!LessThan!@$!--000 and interacting--$@!GreaterThan!@$ Python
processes on many machines/processes. This article looks at the advantages or
drawbacks RPyC has over other distributed Python frameworks such as XML-RPC
and Pyro. A few simple examples of using RPyC are included to give you a
feel for the library.
Source: developerWorks : Linux : Technical library This five-part series walks you through building a simple
photo-sharing Web site using Perl and Apache to access Amazon's Simple Storage
Service (S3) and SimpleDB. In this installment, get a feel for the benefits and
drawbacks of S3 and SimpleDB by taking a tour of their
architectures and starting to design your photo-sharing site.
Source: developerWorks : Linux : Technical library This is the second article in a two-part series that looks at a hands-on
approach to monitoring a data center using the open source tools Ganglia and
Nagios. In Part 2, learn how to install and configure Nagios, the popular open
source computer system and network monitoring application software that
watches hosts and services, alerting users when things go wrong. The article
also shows you how to unite Nagios with Ganglia (from Part 1) and add two
other features to Nagios for standard clusters, grids, and clouds to help with
monitoring network switches and the resource manager.
Source: developerWorks : Linux : Technical library Life's certainties include death and taxes but also the advancement of
the GNU/Linux operating system, and the last two kernel releases did not
disappoint. The 2.6.28 and 2.6.29 releases contain an amazing amount of new
functionality, such as a cutting-edge enterprise storage protocol, two new
file systems, WiMAX broadband networking support, and storage integrity
checking. Discover why it's time to upgrade.
Source: developerWorks : Linux : Technical library If you don't want to commit to the idiosyncrasies of a specific shell running on a particular
platform, try the Squirrel Shell. The Squirrel Shell provides an advanced, object-oriented
scripting language that works equally well on UNIX, Linux, Mac OS X, and Windows systems.
Write a script once, and run it anywhere.
Source: developerWorks : Linux : Technical library The Pluggable Authentication Module (PAM) API exposes a set of
functions that application programmers use for security-related
functions like user authentication, data encryption, LDAP, and more. In this
article, get a basic guide to the PAM model on Linux, see how to
configure PAM, and learn how to design a sample PAM
login application in 10 easy steps.
Source: developerWorks : Linux : Technical library This is the first article in a two-part series that looks at a hands-on
approach to monitoring a data center using the open source tools Ganglia and
Nagios. In Part 1, see how to install and configure
Ganglia, the scalable, distributed monitoring system for high-performance
clusters based on a hierarchical design. Also learn how to
add more monitoring capability by writing Ganglia plug-ins and by enabling
external-source spoofing.
Source: developerWorks : Linux : Technical library Sometimes you need to create an configure a bundle of virtual machines
at the same time, but manually cloning and configuring the lot promises to be
an unhappy task. In this article, see how to develop an automatic VM
deployment solution so you can launch and activate batches of self-configuring
VMs quickly. And as a bonus, you'll discover an approach that lets you run
customized applications separately for each deployed virtual machine after
system start.
Source: developerWorks : Linux : Technical library Computers control and transfer data to SCSI devices via SCSI commands.
In this article, the author introduces some of the SCSI commands and methods
of executing SCSI commands when using SCSI API in Linux. He provides
background on the SCSI client/server model and the storage SCSI command. Next,
he explains the Linux generic SCSI driver API and offers an example of using a
system that focuses on executing the inquiry command using the generic
driver.
Source: developerWorks : Linux : Technical library This series of articles shows how to build a
global positioning system (GPS)-aware application
using the Linux-based Nokia N810 Internet Tablet
and its built-in GPS receiver. In this last of three installments,
you'll put the final touches to the GPS trip tracker and
get it ready for release.
Source: developerWorks : Linux : Technical library The fourth extended file system, or ext4, is the next generation of
journaling file systems, retaining backward compatibility with the previous
file system, ext3. Although ext4 is not currently the standard, it will be the
next default file system for most Linux distributions. Get to know ext4, and
discover why it will be your new favorite file system.
Source: developerWorks : Linux : Technical library Cloud computing and storage convert physical resources (like processors and
storage) into scalable and shareable resources over the Internet (computing and storage
"as a service"). Although not a new concept, virtualization makes this much more scalable
and efficient through the sharing of physical systems through server virtualization. Cloud
computing gives users access to massive computing and storage resources without their
having to know where those resources are or how they're configured. As you might expect,
Linux plays a huge role. Discover cloud computing, and learn why there's a penguin behind
that silver lining. [And see the new Resource links to the latest developerWorks content on cloud computing. -Ed]
Source: developerWorks : Linux : Technical library To efficiently achieve uniform mounting in the presence of multiple,
simultaneous NFS version exports, you need a generic NFS mount utility. Learn
how a generic NFS mount utility
can help reduce handling multiple NFS versions and simplify the management of
those versions. The article
describes the concept of the generic NFS mount, outlines the advantages and
applications of the system, and gives some overall design
details.
Source: developerWorks : Linux : Technical library Bringing up Linux on an IBM System z machine should be fairly easy, but
problems can crop up. If you've had problems, try out these workarounds for
annoying obstacles to starting Linux on an S/390 system: "route-unknown"
messages, bad network service behaviors, file system corruption on shutdown,
too-lengthy boot-path-device processes, and Virtual LAN hardware installation.
Added bonus: Warnings (and workarounds) for two SUSE bugs.
Source: developerWorks : Linux : Technical library Containers provide lightweight virtualization that lets you isolate
processes and resources without the need to provide instruction interpretation
mechanisms and other complexities of full virtualization. In this step-by-step
tour of the container tools called Linux Containers (LXC), the author
introduces you to the tools and shows how to get up and running on
them.
Source: developerWorks : Linux : Technical library Lightweight containers, otherwise known as Virtual Private Servers (VPS)
or Jails, are often thought of as a security tools designed to confine
untrusted applications or users. However, as presently constructed, these
containers do not provide adequate security guarantees. By strengthening these
containers using SELinux or Smack policy, a much more secure container can be
implemented in Linux. This article shows you how to create a more secure
Linux-Security-Modules-protected container. Both
the SELinux and Smack policy are considered works in progress, to be improved
upon with help from their respective communities.
Source: developerWorks : Linux : Technical library Python 3 is the latest version of Guido van Rossum's powerful
general-purpose programming language. It breaks backwards compatibility with
the 2.x line but has cleaned up some syntax issues. This second article builds
on the previous article. In Part 2 of this two-part series, discover more new Python features
and details on more advanced topics such as changes in abstract base classes,
metaclasses, and decorators.
Source: developerWorks : Linux : Technical library The Lua programming language is a small scripting language specifically
designed to be embedded in other programs. Lua's C API allows exceptionally
clean and simple code both to call Lua from C, and to call C from Lua. This
allows developers who want a convenient runtime scripting language to easily
implement the basic API elements needed by the scripting language, then use
Lua code from their applications. This article introduces the Lua language as
a possible tool for simplifying common development tasks, and discusses some
of the reasons to embed a scripting language in the first place.
Source: developerWorks : Linux : Technical library Scheme is a programming language, but Guile -- an interpreter and
library for Scheme -- transforms it into an embedded scripting language,
making it ideal for bringing dynamic new life to your static applications.
Take a quick tour of Guile, and discover its powerful features for building
extensible applications.
Source: developerWorks : Linux : Technical library Discover the details of code design, library selection, unit testing, and
user interface choices that make the most sense for you.
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