November 2020 - Page 2 of 66

How To Install and Use Redis — step-by-step Linux tutorial on Progressive Robot

How To Install and Use Redis

This tutorial covers the Redis Installation, some simple Redis operations, and the 5 Redis data types. Redis, developed in 2009, is a flexible, open-source, key value data store that allows users to store vast amounts of data without the limits of a relational database.

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How to Set Up Software RAID with mdadm on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up Software RAID with mdadm on RHEL 7

How to Set Up Software RAID with mdadm on RHEL 7 Software RAID (Redundant Array of Independent Disks) allows you to combine multiple physical disks into a single logical device that provides redundancy, improved performance, or both — without requiring a dedicated hardware RAID controller. On RHEL 7, the mdadm utility is the standard tool […]

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How To Configure Chroot Environments for Testing on an Ubuntu 12.04 VPS — step-by-step Linux tutorial on Progressive Robot

How To Configure Chroot Environments for Testing on an Ubuntu 12.04 VPS

Often, you may need to set up an environment that is isolated and slightly different than your normal operating system in order to test some software or configuration details. A common strategy in this situation is to configure a chroot environment, which provides a decent amount of isolation and basically provides a bare-bones guest operating system inside of the current one. In this guide, we’ll discuss how to set one up on an Ubuntu VPS instance.

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AtomicInteger in Java — step-by-step Programming tutorial on Progressive Robot

AtomicInteger in Java

Today we will look into AtomicInteger in Java. Atomic operations are performed in a single unit of task without interference from other operations. Atomic operations are necessity in multi-threaded environment to avoid data inconsistency. AtomicInteger ![AtomicInteger, java atomicinteger, atomic integer](images/atomicinteger-java-section-1.png) Let's create a simple multi-threaded program where every thread increments the shared count variable 4 […]

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