March 2020 - Page 6 of 69

FreeBSD 12 — py35-gunicorn — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py35-gunicorn — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-gunicorn — CWE-113 vulnerability Related CVEs: CVE-2018-1000164 Upstream summary: Everardo reports: gunicorn version 19.4.5 contains a CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers vulnerability in process_headers function in […]

Read more
Common Problems 114919

RHEL 8 – subscription-manager Unregistered Host Has No Repositories

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~1 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 & Cross-Refs References & Further […]

Read more
Common Problems 113030

Windows Server 2016 — DHCP client fails to obtain lease on startup — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 30 May 2026 Affected versions: Windows Server 2016 📖 ~1 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 […]

Read more
How to Install Drone CI on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Drone CI on RHEL 10

Introduction Setting up install drone ci on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Drone CI on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and how to validate the […]

Read more
What is Go? — step-by-step Programming tutorial on Progressive Robot

What is Go?

Go is a compiled, statically typed programming language similar in syntax to C. Also referred to as “Golang”, Go is well-known for its performance in networking and multiprocessing. Originally designed at Google, Go version 1.0 released in March 2012 as a public open source project, which now has…

Read more
Spring MVC Example — step-by-step DevOps tutorial on Progressive Robot

Spring MVC Example

URL: https://www.progressiverobot.com/spring-mvc-example/ Welcome to Spring MVC Example. Sometime back in [Spring MVC Tutorial](/community/tutorials/spring-mvc-tutorial), I explained how to create Spring MVC application using Spring Tool Suite. But today, I will be creating a basic hello world spring MVC application using maven and Eclipse. Spring MVC Example Spring MVC is based on Model-View-Controller architecture. Below image shows […]

Read more
How To Set Up Gogs on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Set Up Gogs on Ubuntu 14.04

Gogs is a self-hosted Git service written in Go which is very easy to get running, has low system usage, and includes a web interface, an admin dashboard, and access to operations like Git pull and push. Gogs aspires to be the easiest, fastest, and most painless way to set up a self-hosted Git service.

Read more
Oracle Linux 8 — pcre — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — pcre — vulnerability — patch and remediation guide (ELSA-2021-4373)

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4373 Related CVEs: CVE-2020-14155 CVE-2019-20838 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

Read more
How To Protect Your Server Against the Dirty COW Linux Vulnerability — step-by-step Linux tutorial on Progressive Robot

How To Protect Your Server Against the Dirty COW Linux Vulnerability

On October 21, 2016, a privilege escalation vulnerability in the Linux kernel was disclosed. The bug is nicknamed Dirty COW because the underlying issue was a race condition in the way kernel handles copy-on-write (COW). Exploiting this bug means that a regular, unprivileged user on your server can gain write access to any file they can read, and can therefore increase their privileges on the system. This tutorial explains how to protect your server from this vulnerability.

Read more
How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 7

How to Configure HAProxy for HTTP and TCP Load Balancing on RHEL 7 HAProxy is one of the most widely deployed open-source load balancers in production infrastructure, renowned for its high throughput, low latency, and fine-grained configurability. On RHEL 7 it is available directly from the base repositories and integrates cleanly with systemctl and firewalld. […]

Read more
CHAT