September 2020 - Page 43 of 66

SLES 12 — libproxy1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libproxy1 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2020:518-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25219 CVE-2020-26154 CVE-2012-4504 Upstream summary: url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to trigger uncontrolled recursion via a response […]

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Common Problems 117444

Ubuntu 20.04 LTS NO_PUBKEY Repository Signature Error

🟡 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 […]

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Common Problems 114467

Kernel Module Missing After RHEL 9 Update

🟡 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 […]

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How to Configure NTP on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Configure NTP on IBM AIX 7.1

Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure ntp on ibm aix 7.1 on IBM AIX […]

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How to Install Apache2 on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Apache2 on Debian 10

Introduction How to Install Apache2 on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. This tutorial […]

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Python Set — step-by-step Python tutorial on Progressive Robot

Python Set

URL: https://www.progressiverobot.com/python-set/ In this tutorial we are going to learn Python Set. In our previous article we learnt about Python String. You can learn it from [here](/community/tutorials/python-string). !Python Set, python set example Python Set Python Set is an unordered collection of unique elements. Suppose you have a list and you need only the unique items […]

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Introduction to Containers — step-by-step Docker tutorial on Progressive Robot

Introduction to Containers

A container is a unit of software that packages code with its required dependencies in order to run in an isolated, controlled environment. This allows you to run an application in a way that is predictable, repeatable, and without the uncertainty of inconsistent code execution across diverse development and production environments. Containers enable new design paradigms by strengthening the separation of application code and infrastructure code.

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How To Use Apache as a Reverse Proxy with mod_proxy on Debian 8 — step-by-step Linux tutorial on Progressive Robot

How To Use Apache as a Reverse Proxy with mod_proxy on Debian 8

In this tutorial, you will set up Apache as a reverse proxy using the `mod_proxy` extension to redirect incoming connections to underlying application server(s) running on the same network. There are instructions on setting up a simple web app using the Flask framework to show how Apache interacts with the real application hidden behind it, but you can also follow this tutorial using your existing application server, if you have one.

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Oracle Linux 8 — redis:5 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — redis:5 — vulnerability — patch and remediation guide (ELSA-2019-2002)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2002 Related CVEs: CVE-2019-10193 CVE-2019-10192 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How To Set Up a JupyterLab Environment on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Set Up a JupyterLab Environment on Ubuntu 18.04

JupyterLab is the update over Jupyter Notebook environments, offering a highly feature-rich UI that makes it easier for users, particularly in the fields of Data Science and AI, to perform their tasks. In this tutorial, you’ll install and set up JupyterLab on your Ubuntu 18.04 server. You’ll also be configuring your server to be able to connect to the JupyterLab instance remotely from any web browser, securely, using a domain name

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