Archive for July, 2008

What’s next in Red Hat Enterprise Linux (part 2)

Here’s the final installment of Bill Nottingham’s series based on the talk he gave at this year’s Red Hat Summit. Find out about the latest and greatest Fedora™ developments… and the future of Red Hat® Enterprise Linux® from this experienced engineer. Missed the first part? Catch up in the archives.

Network handling

Another area that’s shown a lot of improvement since Enterprise Linux 5 is networking, especially for desktop and laptop computers. In Fedora 9, we’ve greatly enhanced NetworkManager, and as a result, have switched to NetworkManager by default for all installs. Some of the features we’ve added to NetworkManager include:

  • MobileBroadband support - NetworkManager now supports configuring access via GSM and CDMA cards for even greater connectivity options.
  • System configuration support - NetworkManager now reads my system configuration , as configured via anaconda or system-config-network. This allows support for things such as static IPs.
  • Multiple device support - NetworkManager will automatically connect to both wireless and wired devices simultaneously. This means that if I disconnect the wired device, I’ll have seamless access through my wireless device, instead of having to wait for it to associate and get an IP address.
  • Connection editing - NetworkManager also includes a connection editor. With this, I can easily configure my wireless network, my mobile broadband connection, or even 802.1x for my wired connection.

» Read more


Video: Red Hat Enterprise MRG

Joel Berman explains the ‘G’ part of the MRG offering–the grid. Watch as he demonstrates how the Amazon Cloud can be used to help complete resource-intensive tasks much more quickly.

Download this video: [Ogg Theora]



More information


What’s next in Red Hat Enterprise Linux (part 1)

This is the first in a two-part series from Summit presenter and Red Hat/Fedora engineer Bill Nottingham. It is based on the talk he gave at this year’s Red Hat Summit. Part two will be published later this week.

One of the most-asked questions in the software world is:

“What’s coming in the next release?”

Red Hat® Enterprise Linux® is no different. You can wait for the beta, and pore over the release notes and the package changelogs. You can corner a product manager at the right moment. But the easiest and best way to get the scoop on what’s coming up in future Red Hat Enterprise Linux releases? Take a look at Fedora.

Fedora, for those that don’t know, is a freely available and distributable Linux-based operating system that showcases the latest in free and open-source software. It’s developed globally within the Fedora project community, and is where Red Hat innovates. Read on as we describe some of the innovations in Fedora that will be headed for future Enterprise Linux releases. » Read more


Tips and tricks: What are the options available in kickstart for controlling the behaviour of SELinux?

Release Found: Red Hat® Enterprise Linux® 4
The following options can be used in the kickstart configuration file to control SELinux behaviour in a kickstart installation.

1. selinux –enforcing: Enables SELinux with the default targeted policy being enforced.

2. selinux –permissive: Outputs warnings only based on the SELinux policy, but does not actually enforce the policy.

3. selinux –disabled: Disables SELinux completely on the system.

If any SELinux option is not present in the kickstart file then SELinux is enabled by default and set to –enforcing.

Note: The system-config-securitylevel-tui package is required for controlling the SELinux policies. If this package is removed from the kickstart configuration file, SELinux will set to –enforcing mode by default irrespective of the SELinux options.

It should be noted that Red Hat does not recommend disabling SELinux.

Red Hat’s customer service and support teams receive technical support questions from users all over the world. Red Hat technicians add the questions and answers to Red Hat Knowledgebase on a daily basis. Access to Red Hat Knowledgebase is free. Red Hat Magazine offers a preview into the Red Hat Knowledgebase by highlighting some of the most recent entries. The information provided in this article is for your information only. The origin of this information may be internal or external to Red Hat. While Red Hat attempts to verify the validity of this information before it is posted, Red Hat makes no express or implied claims to its validity.


Friday round-up

Here’s this week’s list of what we found interesting. (And don’t forget–if you see something you think we should see too? Let us know about it.)


Open source telephony: a Fedora-based VoIP server with Asterisk

Voice over Internet Protocol (VoIP) has emerged as a popular technology for modern voice communications. Many organizations have replaced their analog or proprietary digital telephone systems with VoIP-based solutions. This allows the consolidation of telephone services into an existing IP infrastructure. In addition, using IP to host voice services lets the organization leverage existing expertise–while retaining all of the network’s management advantages. Though not without its disadvantages, VoIP provides a compelling option to those looking for a telephone solution.

This article will present a simple VoIP solution using Asterisk, an open source private branch exchange (PBX) product. It will show you how to install Asterisk, configure it using its LDAP backend, and connect to it using the Ekiga software VoIP client and a Cisco 7900 Series VoIP telephone to make calls. » Read more


Video: Fedora Live

Paul Frields (Fedora Project Leader) sits down to discuss the Live USB feature debuted in Fedora 9 with developer Jeremy Katz. See a live demo of the persistant desktop, and find out how to get more involved in the next Fedora release.

Download this video: [Ogg Theora]




NetworkManager: Secret weapon for the Linux road warrior

For years I have envied how easy my Windows- and Mac-based peers had it when traveling with their laptops. They connect to hotspots with ease, get online while I was still logging into root and running some tools. It just wasn’t fair. I wanted an integrated easy-to-use tool that did not require bringing up a shell or logging into root.

I now have that tool in NetworkManager. In this article I will explain what NetworkManager is, what capabilities exist in the tool (in both Fedora and Red Hat Enterprise Linux), and what you can do to extend it to give you more control over your system than before.

What is NetworkManager?

NetworkManager is a software utility that allows a desktop user to manage wired, wireless, modem, WWAN/3G, and VPN network connectivity from a single source. It does not require root access or manual editing of configuration files.

NetworkManager started as a Gnome project and initially appeared in Fedora. It is now supported on multiple desktop environments (Gnome, KDE, Xfce, etc.) and in multiple distributions (Fedora, SuSE, Ubuntu, Gentoo, Debian, etc.). NetworkManager uses dbus and hal to provide network status updates to other desktop applications, allowing them to alter their operation based on this information. For instance, if NetworkManager shows the network is offline, then apps like Evolution and Pidgin will put themselves into offline mode andwait for the network to come online. » Read more