We here at Red Hat are pleased to bring you a brand new set of videos aimed at showing off the latest and greatest enhancements in our technologies–featuring the very people who helped create them in the first place. The “SPOTLIGHT ON” series highlights the ways in which collaboration drives innovation by looking at projects that have been improved by community input. In our first installment, we track down Red Hat’s own Karsten Wade and Stephen Smoogen from the University of New Mexico to talk about Extra Packages for Enterprise Linux (EPEL), the Fedora-sourced repository of add-on packages for Red Hat Enterprise Linux. They discuss how EPEL is a tool for user-driven innovation that comes from and benefits enterprise customers with more stable code and lower business costs.
co-authored with Grig Gheorghiu
The dd command is one of those ancient UNIX tools that is extremely powerful, yet at the same time, the syntax can make it feel slightly archaic. A lot of seasoned sysadmins and developers still remember the first time they saw the dd command used by a bearded wizard. He might have used it to test the disk I/O, capture a disk image, or restore it.
In some ways, dd can seem like Old Spice–only the guys over 60 use it. But the younger generation should know that dd still has some tricks up its sleeve. In this article, we’re going to put a new twist on this old favorite and show how grandpappy really does know best sometimes. The new twist is to mix dd with Python and the Google Chart API to make a UNIX 2.0 mashup tool. (”UNIX 2.0″ is a play on words for what happens when you change the original behavior of a tool like dd to make it do something a bit different.) » Read more
For Satellite:
If the Satellite server is “connected”, then it will initiate outbound connections to ports 80 and 443 on the Red Hat Network (RHN) hosted service (rhn.redhat.com / satellite.rhn.redhat.com). Access to these hosts and ports should not be restricted to ensure correct functioning of the satellite system. If required, an HTTP(S) proxy may be used, by passing the “–http-proxy” option to the “satellite-sync” command.
If using a proxy server, Satellite will initiate connections to port 5222 on each proxy server connected. This is used for communications relating to the “OSA” service (also known as “Push to Client“). If using the OSA service, access to this port should not be restricted.
If you’ve ever watched a video from Red Hat Magazine, you’ve probably heard the soundtracks in the background. Whether it’s the remixable Birdsong video or one of our other interviews or overviews, the music we use is often created in-house by our soundscape specialist. Napoleon creates custom music and animations for various Red Hat projects, as well as commercial materials and custom beats, lyrics, and compositions. In his free time he enjoys sampling 70s soul records to create beats for local hip-hop artists. And now he’s here to share some of his work with you.
Everybody wants to be heard. Some of us have a rhythm to go along with it.
I was introduced to ccmixter a couple months ago and have been hooked ever since. It is a utopia of sound for music makers and mixers alike.
From acapellas and samples to remixes, ccmixter wants you to download, sample, cut-up, and share music of all types. Some artists post entire albums for the community to remix.
Best of all, it’s all licensed under Creative Commons so there’s no worries.
Check out my page of remixes.
If you create a remix and want to get in touch with Napoleon–or just have a question–feel free to leave a comment (or contact information) on this post.
1.) Firstly, lock the account to prevent the user from using the login until the change has been made:
# usermod -L <username>
2.) Change the password expiration date to 0 to ensure the user changes the password during the next login:
# chage -d 0 <username>
3.) To unlock the account after the change do the following:
# usermod -U <username>
With 1.4 billion people connected, the Internet is the greatest collaborative network that mankind has experienced. One of the consequences of the growth of this network is a shift in the way knowledge is being created and distributed. As we move to an interconnected world, the balance of power is shifting from old, proprietary models of knowledge creation to the open source model that emphasizes collaboration and sharing. From management gurus to consulting firms to leading business schools, everyone is taking note of this new phenomenon that goes by various names like ‘Collaborative Innovation,’ ‘Open Innovation,’ or ‘Distributed Co-creation.’
The open source movement has pioneered the Collaborative Innovation trend, and it is no surprise that the rapid growth of the Internet and the equally rapid growth of the open source community have mirrored each other. The Linux® operating system and Wikipedia website are both good examples of open source projects that embody the ideals of Collaborative Innovation. And those in the technology industry aren’t the only ones to take notice. Policy makers and corporate leaders in all markets are exploring how this powerful trend can be harnessed for social and economic development. » Read more
Answer:
The raw devices interface has been deprecated in Red Hat® Enterprise Linux® 5. The rawdevices service and /etc/sysconfig/rawdevices file no longer exist and raw devices are now configured via udev rules. However the preferred method for performing raw I/O (ie. bypassing filesystem caching) is to open EXT3/EXT2 files with the O_DIRECT flag.
This is an excerpt from the raw command’s man page:
Although Linux includes support for rawio, it is now a deprecated interface. If your application performs device access using this interface, Red Hat encourages you to modify your application to open the block device with the O_DIRECT flag. The rawio interface will exist for the life of Red Hat Enterprise Linux 5, but is a candidate for removal from future releases.
