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System76 brings 4K display Ubuntu Linux laptop for Pro users

Finally, some good news for Apple fans who crashed System76 website a few days back. Apple makes a good laptop. However, they lack the option to add additional RAM or ports or graphics card. The new System76 Oryx laptop has a 4K HiDPI display. If you are a sysadmin, DevOps, or developer, give it a try to System76.
System76 Oryx Pro with 4K display

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How to speed up OpenSSL/GnuPG Entropy For Random Number Generation On Linux

Entropy is nothing but the measure of "randomness" in a sequence of bits. The PRNG ( pseudorandom number generator ) is a special device (e.g. /dev/random on Linux) to create randomness from server hardware activities. It uses interrupts generated from the keyboard, hard disk, mouse, network and other sources. The random number generator gathers environmental noise from device drivers and other sources into an entropy pool. The randomness usually used for security purposes like creating TLS/SSL keys and the quality source of random bits is critical. For example, OpenSSL APIs can use quality randomness to make your program cryptographically secure. However, a poor source of randomness could result in loss of security. In this post, I will cover haveged and rng-utils/rng-tools to generate random numbers and feed linux random device for your virtual or dedicated Linux server.

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Book Review: PAM Mastery

PAM Mastery Book ReviewLinux, FreeBSD, and Unix-like systems are multi-user and need some way of authenticating individual users. Back in the old days, this was done in different ways. You need to change each Unix application to use different authentication scheme. Also, authentication schemes differed between a variant of Unix systems. Porting was a nightmare. For example to use Windows Server (Active Directory) or LDAP for authentication you need to make changes to an application. Each application had its way of authenticating users. So Open Group lead to the development of PAM for the Unix-like system. Today Linux, FreeBSD, MacOS X and many other Unix-like systems are configured to use a centralized authentication mechanism called Pluggable Authentication Modules (PAM). The book "PAM Mastery" deals with the black magic of PAM.

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Disabling Google Chrome PDF viewer

Google Chrome has "Chrome PDF Viewer" to view or open pdf files. It is an unwanted feature. I do not need it at all. I want my PDF open in Preview on a MacOS X or default pdf viewer in Linux. This feature was hidden. I want to disable it from my Google Chrome browser because it was slow scrolling with a large pdf file sizes.

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Accessing Internet from cloud VM when you have only private network enabled

We have a couple of virtual servers hosted with Softlayer for processing data and backup purpose. The public interface is completely turned off i.e. no Internet access. We can only access VMs using a VPN. It resulted in decreased costs and many security problems for backend servers. However, when you order "Private Network Only" cloud VM, you cannot route outgoing traffic to the Internet using your VM.

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Book Review: FreeBSD Mastery: Specialty Filesystem

FreeBSD Mastery: Specialty FilesystemsA filesystem is nothing but the data structures that an operating system uses to keep track of files on a disk. The filesystem stores your pictures, music, videos, accounting data and more. The different operating system comes with various filesystems. You may need to move data between FreeBSD and other Unix-like systems like OS X or Linux based device. Knowing all about filesystem help us to archive or move data between system. The "FreeBSD Mastery: Specialty Filesystem" is an essential, practical and well-written book.

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First 64 bit Raspberry Pi 3 released and here are the complete specs and pricing

A new version of the Raspberry PI 3 has released and it is amazing. It is 10x the performance of Raspberry Pi 1. Here are the complete specs for new 64-bit credit card size computer.
Fig.01: Raspberry Pi 3 - Model B - 64 Bit ARMv8 with 1G RAM and WiFi

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Unixstickers Review: Add Beautiful Linux/FreeBSD Stickers To Your Laptop

The Linux-powered device is beautiful on its own but with billions of Linux-powered devices out there it is not particularly unique. You can add stickers to your Linux powered desktop, router, and Laptop to stand out from the crowd with stickers and more. In this post I will be quickly reviewing Unixstickers.com, they claim to be the largest store for high quality and finely printed stickers, t-shirts, mugs, posters and pins on Unix, Linux, programming and software.

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Download of the day: Tails Linux 2.0 ISO CD/DVD

Tails (The Amnesic Incognito Live System) version 2.0 has been released. It is a Debian-based security-focused Linux distribution and it is designed to increase privacy and anonymity online. This release fixes many security issues and users should upgrade as soon as possible.
Download tails 2.0

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Debian Linux 8.3 “jessie” released and here is how to upgrade it from 8.2 to 8.3

Debian 8.3 DesktopThe Debian GNU/Linux project has released an updated version of its stable distribution Debian 8 ("jessie"). You must update to get corrections for security problem as this version made a few adjustments for the serious issue found in Debian 8.2.

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