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‘Mobility verschuift aandacht naar gebruiker’

21 december 2011
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Besturingssystemen

In 2011 kon de twintigste verjaardag van het opensource-besturingssysteem Linux worden gevierd. Computable vroeg zijn experts wat hun verwachtingen zijn voor 2012. Naast de komst van Windows 8 en veel aandacht voor mobiele besturingssystemen, zet virtualisatie volgens hen verder door.


Dat 2012 in het teken zal staan van de introductie van Windows 8 lijkt wel zeker. Het is voor Microsoft het grootste vernieuwingsproject sinds de introductie van Windows 95. Dit zegt Steven Sinofsky, baas van Microsoft’s Windows en Windows Live-divisie. Windows 8 is er niet alleen voor desktops, notebooks en netbooks, maar ook voor tablets met ARM-processors.

Ren Scholten, infrastructure architect bij Capgemini, verwacht dan ook een grote boost rondom Windows 8. En daarmee meer bring your own device. Dat Windows 8 ook op een tablet gaat draaien, betekent dat we straks drie smaken hebben: iPad, Android-tablets n Windows 8-tablets.’ Tijdens de ontwikkelaarsconferentie TechEd 2011 in Nieuw-Zeeland heeft Microsoft de eerste tablets getoond die draaien op het besturingssysteem Windows 8.

Virtualisatie

Daarnaast is er bij de ontwikkeling van Windows 8 veel aandacht voor storage, netwerken en virtualisatie. Zo heeft het besturingssysteem nieuwe toepassingen voor dataopslag in virtuele omgevingen. Onder andere op het gebied van deduplicatie, thin provisioning, business continuity en disaster recovery.

Virtualisatie is volgens de Computable-experts dan ook een belangrijke trend. Scholten: Wat voorheen vooral op servergebied gebeurde, zien we nu terug bij de desktops en applicaties. Meer en meer wordt er gevraagd om flexibele oplossingen, zoals thin clients of bring your own-beleid, die alleen werken als virtualisatie – onafhankelijkheid van de hardware – verder wordt doorgevoerd. Oplossingen zoals Citrix, App-V en virtual desktops vinden we meer en meer terug in moderne architecturen. Deze trend zal verder doorzetten in 2012.’

Jack Cobben, senior engineer bij Clint ICT groep,

Bron: Computable Lees het complete artikel hier: http://www.computable.nl/artikel/consultancy_guide/4324938/1571663/mobility-verschuift-aandacht-naar-gebruiker.html

Oracle gooses Studio compilers for Solaris, Linux

20 december 2011
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Having cranking Solaris Unix up to 11, software giant Oracle has now revved up a new companion set of compilers that work with the new operating system as well as the current Oracle Linux clone of Red Hat’s Enterprise Linux.

The Solaris Studio 12.3 C, C++, and Fortran compilers might bear the Solaris brand and they may have their heritage on the many different platforms that Forte Software originally supported a company that Sun Microsystems acquired for $540m back in August 1999 but the Solaris Studio set spans Sparc T and M series processors as well as earlier Sparc iron running Solaris 10 or 11, and various x86 platforms running Solaris 10 or 11, Oracle Enterprise Linux 5 and 6, and Red Hat Enterprise Linux 5 and 6.

The Studio integrated development environment has two pieces: a code compiler suite and a code analysis suite.

The compiler suite includes C and C++ compilers that have features which make them compatible with the GNU GCC open source compiler set; a Fortran compiler that is compatible with the Fortran77, Fortran90, and Fortran95 specs; the DBX debugger (which works on source code as well as in real-time mode on compiled code); and a performance library chock full of various mathematical algorithms.

The analysis suite has a performance analyzer (to show where performance bottlenecks are between code and the operating system), and in addition to supporting Oracle’s C, C++, and Fortran, the performance analyzer also supports Java. A code analyzer detects dozens of common coding errors and is, in effect, a spell-checker for apps. A thread analyzer sniffs out threading errors in the code to avoid race and deadlock conditions.

The Solaris Studio IDE runs on Windows, Mac, or Unix clients, but it only creates Solaris, RHEL, or OEL code, which is obviously compiled on

Bron: The Register Lees het complete artikel hier: http://go.theregister.com/i/cfa/http://www.theregister.co.uk/2011/12/19/oracle_studio_compilers_tuxedo/

Red Hat grabs gobs o’ green in Q3

20 december 2011
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Linux operating system and middleware software distributor Red Hat continues to power through its fiscal quarters, even while the European economy is choppy and several key industries government and financial services being two important ones are under pressure.

In its third quarter of fiscal 2012, which ended in November, Red Hat’s revenues rose by 23.1 per cent to just a hair over $290m, with support subscription revenues for its various open source products accounting for $246.5m (up 29.2 per cent) and training and professional services revenues hitting $43.5m (up only 18.4 per cent).

Red Hat also managed to keep sales, marketing, research, and development costs from keeping pace with subscription sales, and therefore the black ink at the bottom line was 47 per cent thicker, at $38.2m.

For the nine months ended in November, Red Hat had $836.1m in sales (up 25.8 per cent) and brought $110.7m to the bottom line (up 50.1 per cent).

Red Hat ended the quarter with $808.3m in cash and equivalents, down thanks to the $136m acquisition of open source cluster file system maker Gluster. Red Hat has no debts, and $819.6m in short-term and long-term deferred revenues, most being short-term.

Obviously, Red Hat is still the poster child more of a pin-up teenager with 1970s hair these days for how to commercialize open source software. No other company has come even close to the sales and profit levels that Red Hat has generated from open source software, and some might argue that no one else ever will, either.

It’s also clear from the numbers that Red Hat’s growth for sales and profits is slowing a tiny bit as fiscal 2012 progresses; some of that is tough compares, some of it is the dicey economy. But the fact of the matter is that Red

Bron: The Register Lees het complete artikel hier: http://go.theregister.com/i/cfa/http://www.theregister.co.uk/2011/12/19/redhat_q3_f2012_numbers/

VMware Workstation Fedora 15

19 december 2011
By

Hello there! If you are new here, you might want to subscribe to the RSS feed for updates on this topic.

If you are using a version of Linux with kernel 2.6.40.XXX you could face problems while launching VMware Workstation or Server which will lead to a generic error message :

 Unable to build vmmon module 

Checking into the installation logs created by the setup routine you will find something similar to the following :

 Aug 14 10:36:45.956: app-140224185415456| Log for VMware Workstation pid=2907 version=7.1.4 build=build-385536 option=Release
Aug 14 10:36:45.956: app-140224185415456| The process is 64-bit.
Aug 14 10:36:45.956: app-140224185415456| Host codepage=UTF-8 encoding=UTF-8
Aug 14 10:36:45.956: app-140224185415456| Logging to /tmp/vmware-root/setup-2907.log
Aug 14 10:36:46.077: app-140224185415456| modconf query interface initialized
Aug 14 10:36:46.077: app-140224185415456| modconf library initialized
Aug 14 10:36:46.127: app-140224185415456| Your GCC version: 4.6
Aug 14 10:36:46.139: app-140224185415456| Your GCC version: 4.6
Aug 14 10:36:46.157: app-140224185415456| Your GCC version: 4.6
Aug 14 10:36:46.182: app-140224185415456| Your GCC version: 4.6
Aug 14 10:36:46.201: app-140224185415456| Your GCC version: 4.6
Aug 14 10:36:46.274: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.277: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.280: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.283: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.285: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.329: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.336: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.339: app-140224185415456| Trying to find a suitable PBM set for kernel 2.6.40-4.fc15.x86_64.
Aug 14 10:36:46.342: app-140224185415456| Trying to find a suitable PBM set for

Bron: TuxForge Lees het complete artikel hier: http://feedproxy.google.com/~r/Tuxforge/~3/YaRE0QdNxl4/

Fedora 15 install Adobe air

19 december 2011
By

Hello there! If you are new here, you might want to subscribe to the RSS feed for updates on this topic.

Who follows me know that Im an avid Twitter user, what? You still dont follow me @Tuxforge? what are you waiting for?, and so far no matter how many clients Ive tried to install I cant get away from my favourite client which is Tweetdeck.

Im not writing a review of the product but suffice to say it is a feature rich twitter client written for Adobe Air, so far so good, but as you probably know Adobe support for Linux and specially for x64 systems is far from being great (*cough* flash *cough*) and while there are plenty of Twitter client out there, as Ive already said, I cannot really get away from Tweetdeck so how can we install Adobe Air on a Fedora 14/15 x64 system? It could not be easier lets see how to proceed!

Adobe on Linux x64 pre-requisites (aka what do I need?)

As Ive said Adobe Air is a 32bit only package so the RPM available on Adobe website will not work (surprise!) with your x64 system so we need to install a few required packages to make it work, here Im assuming you are already using the RPMForge repositories in addition to the standard ones that come with your distribution.

So lets install all the required package/libraries to make Adobe Air work with our Fedora system :

 yum install install ld-linux.so.2 gtk2-devel.i686 libdbus-glib-1.so.2 libhal.so.1 rpm-devel.i686 libXt.so.6 gnome-keyring-devel.i686 libDCOP.so.4
libxml2-devel.i686 nss-devel.i686 libxslt.i686 xterm libgnome-keyring.i686 rpm-build 

The above command will install everything that is required, around

Bron: TuxForge Lees het complete artikel hier: http://feedproxy.google.com/~r/Tuxforge/~3/bR_z6Oyojek/

Virtmanager connect to remote Xen | Unable to open a connection to the libvirt management daemon virtmanager

19 december 2011
By

Hello there! If you are new here, you might want to subscribe to the RSS feed for updates on this topic.

In my work and in my studies Im more often than not using virtualization to get the job done, most of them time Im using VMware or KVM together with virtmanager, the latter specifically for preparing to update my RHCE, but my new job requires me to spend a great deal of time dealing with Novell SuSe Enterprise Linux which includes and uses the Xen hypervisor with which Im not that familiar as Ive dealt both with Xen and Citrix Xen server in the past but always preferred other types of solutions.

Unable to open a connection to the libvirt management daemon virtmanager

Yesterday afternoon I was dealing with a test Xen installation that we are using in a lab for quick deployment of new Linux machines in the customers environment and after I installed Xen on the server I went to my laptop and fired up virtmanager and tried to connect to the machine but all I could get back was the following error message :

 emUnable to open a connection to the libvirt management daemon.

Libvirt URI is: xen+ssh://root@foobar/

Verify that:
 - The 'libvirtd' daemon has been started

Unable to open connection to hypervisor URI 'xen+ssh://root@server/':
 server closed connection
None

Maybe you need to install ssh-askpass in order to authenticate. 

As it often happens it was not immediately obvious what the problem was specially if you think that I’ve used the same computer to connect to lot of KVM installations remotely without any problem, first thing I’ve checked were the

Bron: TuxForge Lees het complete artikel hier: http://feedproxy.google.com/~r/Tuxforge/~3/TGqoELqcsNU/

Linux FTP Server not working

19 december 2011
By

Hello there! If you are new here, you might want to subscribe to the RSS feed for updates on this topic.

Q: Ive installed the FTP server package on my Linux machine but when I try to connect to it via an FTP client the connection does not work. How can I solve this?

A: When opening a connection to an FTP server the client will actually open two connection to your server, one of the two is used for the data channel which need to be allowed on your firewall, assuming you are using the default Linux IP Tables firewall you will need to import the needed kernel modules otherwise the FTP server will not work.

Linux FTP Server configuration

The first step for your FTP Server configuration will be, of course, installing the FTP Server package in our example we are going to use vsFTP which is the default shipping with Red Hat based distributions :

 yum install vsftpd 

Once this is done you can proceed to configure your firewall to allow FTP connections to the server. Just as raw guideline you can use something similar to the following :

iptables -I INPUT 1 -p tcp --dport 20:21 -j ACCEPT 

At this point you could think your FTP Server is working what is really missing, and more often than note cause of headaches when configuring a Linux FTP server, is importing the kernel modules needed by IP tables with the following command :


 modprobe ip_conntrack_ftp 

Once you have done this you can test your FTP

Bron: TuxForge Lees het complete artikel hier: http://feedproxy.google.com/~r/Tuxforge/~3/XpMR8B8sbUY/

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