IT, Cloud & DevOps Blog

How To Deploy Rails Apps Using Passenger With Nginx on CentOS 6.5 — step-by-step Linux tutorial on Progressive Robot

How To Deploy Rails Apps Using Passenger With Nginx on CentOS 6.5

  • September 22, 2019
  • Linux
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In this the cloud provider article, we are going to show you — from start to finish — how to have a rock solid Rails application deployment (i.e. published online) using the latest available CentOS operating system renowned for its stability. This will be alongside Phusion Passenger application server, known for its simplicity and excellent features, coupled with Nginx HTTP server running in front to handle and manage connections.

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An Introduction to RAID Terminology and Concepts — step-by-step DevOps tutorial on Progressive Robot

An Introduction to RAID Terminology and Concepts

This article introduces some fundamental concepts related to arranging storage devices in RAID arrays. RAID can be used to improve the redundancy or performance characteristics of your storage infrastructure. This guide discusses some key terminology you might come across, introduces how implementation details affect your arrays, and covers some of the pros and cons of various RAID levels.

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Common Problems 115429

RHEL 7 SELinux denial preventing httpd outbound connection

  • September 21, 2019
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 21 September 2019 Affected versions: RHEL 7 📖 ~2 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]

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FreeBSD 12 — messagelib — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — messagelib — vulnerability — patch and remediation guide

  • September 21, 2019
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 21 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: messagelib — HTML email can open browser window automatically Related CVEs: CVE-2018-19516 Upstream summary: Albert Astals Cid reports: messagelib is the library used by KMail to display emails. messagelib by […]

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How to Configure Horizontal Pod Autoscaling on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Configure Horizontal Pod Autoscaling on SLES 15

Introduction This tutorial covers How to Configure Horizontal Pod Autoscaling on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: zypper […]

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The paste() function in R - A brief guide — step-by-step DevOps tutorial on Progressive Robot

The paste() function in R – A brief guide

URL: https://www.progressiverobot.com/paste-in-r/ Using the paste() function in R will be straight and simple. In this tutorial let's see how we can use paste() to concatenate the strings and values. paste(): Takes multiple elements from the multiple vectors and concatenates them into a single element. Along with paste() function, R has another function named paste0(). Yes, […]

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FreeBSD 12 — xboing — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — xboing — vulnerability — patch and remediation guide

  • September 21, 2019
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 21 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: multiple buffer overflows in xboing Related CVEs: CVE-2004-0149 Upstream summary: Steve Kemp reports (in a Debian bug submission): Due to improper bounds checking it is possible for a malicious user […]

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openSUSE Tumbleweed — perl-Tk — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — perl-Tk — vulnerability — patch and remediation guide

  • September 21, 2019
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SA:2006:052 (see also SUSE bugzilla) Related CVEs: CVE-2006-4484 Upstream summary: Buffer overflow in the LWZReadByte_ function in ext/gd/libgd/gd_gif_in.c in the GD extension in PHP before 5.1.5 allows remote attackers to have an […]

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