Howto disable / enable autostart of MariaDB 5.x & 10.x at system startup on Ubuntu 14.04.1 64bit

To disable autostart of MariaDB during system boot / startup do as follows

$ sudo update-rc.d -f mysql disable


and to enable it again do

$ sudo update-rc.d mysql enable

or

$ sudo update-rc.d mysql default

Howto Setup Intel® SDK for OpenCL* Applications XE 2013 (Open Computing Language) for GPGPU & Parallel Programming on Ubuntu 12.04.2 64 bit

There are very few installation guides available for setting up Intel® SDK for OpenCL* Applications XE 2013 on Ubuntu 12.04.2 and following steps should help with you to quickly configure your system

1. Download Intel SDK for OpenCL Application XE 2013 version from Intel site

http://software.intel.com/en-us/vcsource/tools/opencl-sdk-xe

select 64-bit SDK and click on download button

2. Then click on "Installation Instruction" link (just under download button) and download public key from this page.

Intel-E901-172E-EF96-900F-B8E1-4184-D7BE-0E73-F789-186F.pub

3. Now import the public key

$ sudo rpm --import Intel-E901-172E-EF96-900F-B8E1-4184-D7BE-0E73-F789-186F.pub

4. Once sdk is downloaded, extract the file.

$ tar zxvf intel_sdk_for_ocl_applications_2013_xe_sdk_3.0.67279_x64.tgz

5. Now we need to install additional packages to manage RPM files & other tools for building packages

$ sudo apt-get install rpm alien build-essential fakeroot dpkg-dev

6. Now lets verify signature of rpm files. For example, do this for all rpm files

$ rpm --checksig opencl-1.2-base-3.0.67279-1.x86_64.rpm

and the result should be as follows

opencl-1.2-base-3.0.67279-1.x86_64.rpm: rsa sha1 (md5) pgp md5 OK

7.  Lets proceed to convert all .rpm files to .deb

$ fakeroot alien --to-deb --scripts *.rpm

8. We need to create /usr/lib64 folder, if it is not existing

$ sudo mkdir /usr/lib64

9. Now lets proceed with the installation

$ sudo dpkg -i opencl-1.2-base_3.0.67279-2_amd64.deb
$ sudo dpkg -i opencl-1.2-devel_3.0.67279-2_amd64.deb
$ sudo dpkg -i opencl-1.2-intel-cpu_3.0.67279-2_amd64.deb
$ sudo dpkg -i opencl-1.2-intel-devel_3.0.67279-2_amd64.deb
$ sudo dpkg -i opencl-1.2-intel-mic_3.0.67279-2_amd64.deb

10. As required by Ubuntu, lets create symbolic links for libraries

$ sudo ln -s /usr/lib64/libOpenCL.so /usr/lib/libOpenCL.so
$ sudo ln -s /usr/lib64/libOpenCL.so.1 /usr/lib/libOpenCL.so.1
$ sudo ln -s /usr/lib64/libOpenCL.so.1.2 /usr/lib/libOpenCL.so.1.2

and update library cache

$ sudo ldconfig

11. Lets test our installation by downloading sample application from following link

http://software.intel.com/sites/default/files/article/391203/capsbasic-sample.tar.gz

and extract the file

$ tar zxvf capsbasic-sample.tar.gz
$ cd CapsBasic
$ make
$ ./capsbasic

And if the application compiles & runs successfully displaying system information then your installation is successful

Sucess Story - Deploying Open Source in Enterprise

We were setting up 75 seater backoffice for our organisation and we decided to use Linux as desktop operating system in anticipation of reducing TCO.

Basic Requirement

First step taken was to ensure that our sysadmin team is Linux ready with training and studying online references.

Preparation

We evaluated multiple Linux distributions and Ubuntu topped our list for its ease of use and extensive online documentation. Next step was to list down open source alternative softwares for all applications / tools used by our backoffice team.

We did test run with a small user group to ascertain Ubuntu's suitability and reliability for its smooth implementation in a larger environment. Issues encountered during implementation and operations were documented along with their solutions. After the successful run for a month with this user group, it was then implemented at our new 75 seater backoffice.

Deployment

To ensure that Ubuntu installation is consistent across all desktops, the customised Ubuntu installation guide was used which was prepared during test run. The applications installed on desktops were Libre Office, VLC, Flash plugin, Java JRE, PDF reader, 7Zip, Gimp, Microsoft compatible fonts, hplip printer drivers, etc. And likewise-open was used to join Ubuntu desktops to Windows Domain.

As all 75 desktops were of similar configuration we first got one system ready and then used clonezilla to clone this system to remaining 74 systems.

Key benefits

- Reduced TCO which is crucial for growing organisation

- Easy integration of Ubuntu system in existing environment

- Secured environment

- Better system management

- Reduced downtime

- Vast online community support

Seeing the result and the success herein Ubuntu replaced the existing operating at our regional offices thereby giving brighter results with each new implementation.