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How to fix Virtualbox error “Kernel driver not installed (rc=-1908)” on Ubuntu

Virtualbox I recently installed the latest version of Virtualbox (4.3.12) by downloading the deb files from virtualbox.org on Ubuntu 14.04. The installation goes fine, but when trying to run Virtualbox, it reports the following error. Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing '/etc/init.d/vboxdrv setup' as root. If it is available in your distribution, you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles...
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CentOS 6.5 vs. CentOS 7.0 NAS Performance Comparison

After years of development, RedHat finally released the next major version of RedHat Enterprise Linux (RHEL) v7. RedHat Enterprise Linux is an enterprise-grade Linux distribution, which is frequently used in corporate data centers as an operating system for NAS storage devices. From the performance point of view, the new Linux kernel and the new default file system may have a significant impact on a NAS storage device and therefore it is very important to understand how the newly released RedHat Enterprise Linux version 7.0 compares to the last stable version 6.5.

 

http://www.flexense.com/centos6_vs_centos7_nas_performance.html

 

 

How To : Install NVIDIA 331.89 (Stable) Graphics Drivers in Ubuntu/Linux Mint Systems

The latest version of Nvidia Graphics driver for Linux which is Nvidia 331.89 has been released and is available for download. It comes with plenty of fixes and changes. This article will guide you to install Nvidia 331.89 in Ubuntu and Linux Mint systems.

Fixes

  • Added support for the following GPU:
      GeForce GT 730
  • Fixed a race condition in the NVIDIA kernel module that caused some GPUs to sporadically become unresponsive.
  • Updated the error reporting in the NVIDIA kernel module to include the GPU serial number, when available, in error messages written to the system log.
  • Fixed a bug that caused blank screens when transforming or rotating displays in an SLI Mosaic layout.
  • Fixed a bug that corrupted certain software rendering on 32-bit systems.

Read more on YourOwnLinux

 

CentOS 6.5 vs. CentOS 7.0 NAS Performance Comparison

After years of development, RedHat finally released the next major version of RedHat Enterprise Linux (RHEL) v7. RedHat Enterprise Linux is an enterprise-grade Linux distribution, which is frequently used in corporate data centers as an operating system for NAS storage devices. From the performance point of view, the new Linux kernel and the new default file system may have a significant impact on a NAS storage device and therefore it is very important to understand how the newly released RedHat Enterprise Linux version 7.0 compares to the last stable version 6.5.

 

http://www.flexense.com/centos6_vs_centos7_nas_performance.html

 

 

How To : Install NVIDIA 340.24 Graphics Drivers in Ubuntu/Linux Mint Systems

  The latest version of Nvidia Graphics driver for Linux which is Nvidia 340.24 has been released and is available for download. It comes with plenty of fixes and changes. This article will guide you to install Nvidia 340.24 in Ubuntu and Linux Mint systems.

Fixes

  • Fixed a bug that prevented 3D Vision stereo and ultra low motion blur modes from working on G-SYNC capable monitors in some cases.
  • Fixed a bug that caused the "Allow G-SYNC" checkbox to be displayed in nvidia-settings even if the GPUs in the system are not capable of G-SYNC.
  • Fixed a kernel crash when running some applications with IOMMU functionality enabled.
  • Fixed a floating point exception in the OpenGL driver when running "Risk of Rain" under Wine.
  • Made various improvements and corrections to the information reported to GL applications via the KHR_debug and ARB_debug_output extensions.
  • Fixed a bug that caused GLX applications which simultaneously create drawables on multiple X servers to crash when swapping buffers.
  • Updated nvidia-settings to report all valid names for each target when querying target types, e.g. `nvidia-settings -q gpus`.
  • Added support for controlling the availability of Fast Approximate Antialiasing (FXAA) on a per-application basis via the new __GL_ALLOW_FXAA_USAGE environment variable and the corresponding GLAllowFXAAUsage application profile key. See the README for details.
  • Fixed a bug where indirect rendering could become corrupted on system configurations that disallow writing to executable memory.
  • Updated the nvidia-settings Makefiles to allow nvidia-settings to be dynamically linked against the host system's libjansson. This option can be enabled by setting the NV_USE_BUNDLED_LIBJANSSON Makefile variable to 0.Please note that nvidia-settings requires libjansson version 2.2 or later.

Read more on YourOwnLinux

 

How To : Install/Upgrade to Linux Kernel 3.15.5 in Ubuntu/Linux Mint Systems

   "The Linux Kernel 3.15.5 is now available for the users and all the users of 3.15 kernel series must upgrade", announced Greg Kroah-Hartman.This Linux Kernel version comes with plenty of fixes and improvements. This article will guide you to install or upgrade to Linux Kernel 3.15.5 in your Ubuntu or Linux Mint system.

 

More details on YourOwnLinux

 

The Linux app store is your safest friend

One of the cool features that Android and IOS have developed are application stores. Application trust is vital. When you download a program from those apps stores, you are getting something trusted, stable and frequently upgraded.

Something also integrated this same concept. Linux is another system that delivers a system that allows you to download and install programs that are designed to work with that system. There is no guessing if the program is safe to install. If it is not available in Linux's app store, don't pay it too much attention it. Install only if vitally needed.

Ubuntu created a very user friendly app store for downloads, "Ubuntu Software Center". Before you Google, check the products in your local store first.

 

http://greplinux.com/blog/2014/02/23/whats-different-about-linux-programs/

 

Mobile Phone Management Made Easy

Mobile phone users should not regard their computer only as the means of recharging their phone, or transferring files to and from the phone's storage. There's a lot more than you can do with your Linux box. This article illustrates some good open source tools that let you manage your mobile phone.

This roundup selects 4 of my favourite mobile phone management tools; all of them are released under an open source license.

<A HREF="http://www.linuxlinks.com/article/20140705063155544/MobilePhoneManagement.html">Read on</A>

 

Devscript: Local Development Environments on Linux with just one Command

Did you ever have that experience when you’re setting up a new Development Environment when you’ve just formatted your system or when you somehow screwed up your Configuration?.

Or Maybe you just don’t want to google for an hour every time you set this stuff up?

Let me show you what it is like with the usual installation:

sudo apt-get install apache2

sudo apt-get install php5

sudo apt-get install mysql

sudo apt-get install php5-mcrypt

php5enmod mcrypt

Arghhh!!!!!

We are really smart Developers, We shouldn’t need to do this stupid stuff.

So, How do we fix this?

You don’t need to, Its already fixed.

Have a look at this little tool called Devscript.

Its Local Development Environments with just one Command.

Don’t believe me? Just have a look at this little Video.

DevScript from Nihal Sahu on Vimeo.

Cool, Right?

Anyway ,Try Using DevScript for your projects too.

The Official Github Page

 

How to check processor and cpu details on Linux

Processor/Cpu details The details about the processor that we shall be talking about include, number of cores, availability of hyper threading, architecture, cache size etc. To find these details about the cpu on your system can be a bit difficult because the way different commands check them. The commands that we are going to use include lscpu, /proc/cpuinfo and lstopo (hwloc). They report detailed information about the cpu cores/processing units. The examples...
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Mobile Development: How to Install Android Studio on Ubuntu Version 14.04

This article is focused towards Android App Development in a Linux distribution, especially in Ubuntu 14.04 environment using the Android Studio.

Android Studio, is an IntelliJ IDEA-based Android development environment, which is currently in the Beta stage. It is packed with multi-features and improvements over Eclipse ADT. As currently it is in beta stage, once it reaches to the final stage of development, it will be known as Android IDE. It provides a comprehensive tool for developing and debugging applications for the Google operating system for mobile devices. With the help of IntelliJ, the Android Studio offers the following features:

  • Flexible Gradle-based build system.
  • Ability to generate and build multiple APK & variants, respectively.
  • Extended template support for Google-based services and several types of devices.
  • Theme editing support with rich layout editor.
  • Catch the performance, usability, version compatibility, and other problems with the Lint tools.
  • Fully capable of ProGuard and app-signing.
  • Easily integrate Google Cloud Messaging and App Engine with its built-in support for Google Cloud Platform.

Download the Android Studio from here.
This download includes:

  • Android Studio Beta.
  • All the Android SDK Tools to design, test, and debug your app.
  • A version of the Android platform to compile your app.
  • A version of the Android system image to run your app in the emulator.

The following procedure is for installing Android Studio, and therefore does not serve to update it. That's because the program has its own "Update Manager". With this update to Android Studio to the latest version, just click "Check for updates now" in the welcome screen, and simply click "Update and Restart":

Update Android Studio

Please remember that, the package will try to install one of these JDKs: default-jdk, oracle-java7-installer or oracle-java8-installer. So, just make sure that, installing the Android Studio, install one of these packages via the PPA repository.

How to Install Android Studio on Ubuntu Studio 14.04?

In order to install Android Studio on Ubuntu Studio 14.04 and derivatives, do the following:

Step 1: Open a terminal using the Dash or pressing Ctrl + Alt + T keys.
Step 2: If you have not, add that repository with the following command:

sudo add-apt-repository ppa: paolorotolo / android-studio

Step 3: Update the APT with the command:

sudo apt-get update

Step 4: Now install the program with the command:

sudo apt-get install android-studio

Step 5: Once installed, run the program by typing in Dash:

studio

 
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