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When I was tried to enable HTTP/2 for www.admon.org, I noticed that there is not much resource on how to enable HTTP/2 on Debian Jessie. I think the point is that there are some dependencies on HTTP/2, which are kinda…

How can we check whether a hard drive is SSD or HDD? There are two ways for you to find it out. Way 1: On the latest kernels, the SSD disks are automatically detected. You can find the result typically like…

Well, the world is running faster. It’s just one year after the Raspberry Pi 2 B was unveiled as the first performance Raspberry Pi, the foundation announced the Pi 3, which looks the same with same price.

I thought I had posted usage examples for hpacucli already, but I cannot find it.. Anyway here comes another one. If you need more detailed info, don’t forget to read its general manual. Controller Commands : hpacucli> ctrl all show…

The very latest version of Sun Oracle JDK can be downloaded from its official website here. The one we need is  jdk-7u45-linux-x64.tar.gz.  When we got this file, it can be installed with following commands:

In the past serval years, I’ve been focusing on Linux system administration for a long while. Now, I think it’s time to make some changes. I’m going to widen the subjects here and more topics over the IT field will…

Zend Optimizer+ is to be integrated into the currently-in-development PHP 5.5. The announcement was made by Zeev Suraski, CTO and co-founder of Zend Technologies.

Fedora Linux version 18 has been released today at Jan, 15. Fedora Linux is considered as the third most popular Linux distribution, behind Ubuntu and Mint for desktop usage. The new version comes with several new features such as –…

In Linux driver development and application development., When you want to allocate memory, you’ll face a lot of memory allocation functions: malloc kmalloc of the vmalloc alloc_page dma_alloc etc.

Unbuffered memory is also known as unregistered memory (or UDIMM). Buffered memory is also known as registered memory (or RDIMM). Unbuffered memory is memory where the memory controller module drives the memory directly, instead of using a store-and-forward system like…