KVM virtualization: Install KVM hypervisor in Ubuntu/Debian Linux?

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February 17, 2016

woo-hoo..! we are at the practical posts on KVM virtualization now. From this post on words we will see on how to install KVM hypervisor and use it to the maximum with commands as well as GUI tools. Till this point we seen some basics such as..

Let us start with KVM hypervisor in Ubuntu/Debian Linux operating system.

Step1: Before installing KVM(Kernel Virtual machine) hypervisor we have check if our hardware support or not.Click here to know if your hardware support KVM or not.

Step2: If the hardware supports, install KVM virtualization with following command as a normal user.

sudo apt-get install virt-manager ubuntu-virt-server python-vm-builder

What actually the above packages do?

Read Full Post: http://www.linuxnix.com/kvm-virtualization-install-kvm-hypervisor-in-ubuntudebian-linux/

What is SGID and how to set SGID in Linux?

By

Surendra Anne

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February 17, 2016

This is next to SUID in our ongoing Linux file and folder permissions series. We already discussed about CHMOD, UMASK, CHOWN, CHGRP, SUID, StickyBit and SUDO concepts in our previous posts. In this post we will see

What is SGID?

Why we require SGID?

Where we are going to implement SGID?

How to implement SGID in Linux?

What is SGID?

SGID (Set Group ID up on execution) is a special type of file permissions given to a file/folder. Normally in Linux/Unix when a program runs, it inherits access permissions from the logged in user. SGID is defined as giving temporary permissions to a user to run a program/file with the permissions of the file group permissions to become member of that group to execute the file. In simple words users will get file Groupâ€™s permissions when executing a Folder/file/program/command.

SGID is similar to SUID. The difference between both is that SUID assumes owner of the file permissions and SGID assumes groupâ€™s permissions when executing a file instead of logged in user inherit permissions.

Read Full Post: http://www.linuxnix.com/sgid-set-sgid-linuxunix/

How to setup virtual containers with LXC and quota support on Debian 8

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Falko Timme

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February 17, 2016

Quota support is an often requested feature in lxc. Linux filesystem quota is required when you want to give multiple users access to a container and want to control that one user is not using all the disk space. Quota is also required for web hosting servers, e.g. with ISPConfig 3, for the same reason: one website shall not be able to fill up the whole disk. This howto shows you, how you can use lxc with hard disk quota using qemu nbd with a qcow image file on Debian 8.

Meizu PRO 5 Ubuntu Edition Announced and It’s a Beast

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Softpedia

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February 17, 2016

meizu-pro-5 Canonical and Meizu have just revealed that Meizu PRO 5 Ubuntu Edition will be available for pre-order during Mobile World Congress 2016.

It’s been a while since we last heard something from Meizu, but it looks like the collaboration between Canonical and the Chinese hardware maker is still alive. From the looks of it, the previous Meizu MX4 Ubuntu Edition was only a limited release, so only a small number of devices have been sold.

This latest Meizu PRO 5 Ubuntu Edition is the fifth official device that comes with Ubuntu Touch, and we’ll likely see many more phones and maybe tablets with this operating system landing in 2016.

Linux Systems Patched for Critical glibc Flaw

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eWeek

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February 17, 2016

Google exposed a critical flaw affecting major Linux distributions. The glibc flaw could have potentially led to remote code execution.

Linux users today are scrambling to patch a critical flaw in the core glibc open-source library that could be exposing systems to a remote code execution risk. The glibc vulnerability is identified as CVE-2015-7547 and is titled, “getaddrinfo stack-based buffer overflow.”The glibc, or GNU C Library, is an open-source implementation of the C and C++ programming language libraries and is part of every major Linux distribution. Google engineers came across the CVE-2015-7547 issue when they were attempting to connect into a certain host system and a segmentation fault (segfault) occurred, causing the connection to crash. Further investigation revealed that glibc was at fault and the crash could potentially achieve an arbitrary remote code execution condition.

Apache Arrow Unifies In-Memory Big Data Systems

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ZDNet

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February 17, 2016

Leaders from 13 existing open source projects band together to solve a common problem: how to represent Big Data in memory for maximum performance and interoperability.

In-memory data systems have have had a panache for several years now. From SAP HANA to Apache Spark, customers and industry watchers have been continually intrigued by systems that can operate on data directly in memory, bypassing the slowness of disks and the sequential read rubric of file systems. Whether or not in-memory is always the best way to go, it’s usually a crowd-pleaser. In fact, most modern BI systems use their own in-memory engines…

Arrow is not an engine, or even a storage system. It’s a set of formats and algorithms for working with hierarchical, in-memory, columnar data and an emerging set of programming language bindings for working with the formats and algorithms.

Idea – Man Made Molten Rock (Lava) As An Energy Storage?

By

Per Lindholm

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February 17, 2016

First we tamed the water flow. Building hydro power plants. After that we should have looked at the other natural energy containers. I’m talking melted rock or lava. Not that we should tap that energy. It just seem so natural that we should get inspired by that instead. We need more energy storages. So because volcanoes are a terrifying display of energy. Could not this inspire a new energy storage?

In comparison with pumped hydro. Could we develop man made molten rock or lava as a way of storing energy? Not tapping into a natural source but actually making our own molten rock.

Because the material is so very very cheap (rock) compared to Lithium Ion batteries.
I think this is definitely worth the research. Also using lava should mean no metal shortages.

Pahoehoe toe

Image taken from commons.wikimedia.org

I belive you need to use your brain for all kinds of problems to be able to come up with solutions that are more IT related. In this case energy storage.

Is D-Wave’s Quantum Processor Really 10⁸ Times Faster Than a Normal Computer?

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ArsTechnica

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February 17, 2016

d-wave1-640x513 Short answer: Yes, but it’s more complicated than that. We have been following D-Wave’s claims about its quantum hardware at Ars for a number of years. Over that time, my impression has oscillated between skepticism, strong skepticism, and mild enthusiasm….

Of course the best way to judge D-Wave is not by its press releases nor by the specifications and benchmarks glued on the boxes of its processorsâ€”these should be treated with utmost paranoid suspicion. Instead, it’s better to look at what researchers who have access to D-Wave hardware are claiming in publications.

Here Comes the Terabit per Second Network

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ZDNet

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February 17, 2016

Local area networks and the Internet have the technology needed to shatter old speed records.

In the US, the Federal Communications Commission (FCC) has redefined broadband as being at least 25 Mbps down and 3 Mbps up. While some moronic senators think that’s too fast, everyone else knows it’s way too slow. The technical problem is the demand for broadband has grown ever higher — thanks Netflix — while the Internet backbones can’t keep up with the demand.

9 Key Trends in Hybrid Cloud Computing

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Datamation

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February 17, 2016

Hybrid cloud computing is trending upward, despite various tech pundits saying that public cloud is the all-consuming dominant model. All three forms of cloud computing – public, private, and hybrid – have undergone considerable evolution since the concepts first gained the attention of IT years ago. Hybrid cloud is the overwhelming favorite form of the cloud, with 88% of firms surveyed rating it as important or critical to their business.

The lightning-fast evolution of hybrid cloud means the conventional wisdom of a year or two back is already obsolete. So we asked several industry analysts where they saw the hybrid cloud headed in 2016 and got some interesting answers.