Linux

How to Set Up Nginx as a Reverse Proxy on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up Nginx as a Reverse Proxy on Debian 11

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up set up nginx as a reverse proxy on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each […]

Read more
Alpine Linux edge — openrc — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — openrc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.44.6-r1 📖 ~4 min read  •  Source: Alpine secdb entry — openrc 0.44.6-r1 Related CVEs: CVE-2021-42341 Upstream summary: Alpine main repository for vedge ships openrc 0.44.6-r1 which addresses CVE-2021-42341. Table of contents Symptom & Impact Environment […]

Read more
How To Set Up ModSecurity with Apache on Ubuntu 14.04 and Debian 8 — step-by-step Linux tutorial on Progressive Robot

How To Set Up ModSecurity with Apache on Ubuntu 14.04 and Debian 8

ModSecurity is a free web application firewall (WAF) that works with Apache, Nginx and IIS. It supports a flexible rule engine to perform simple and complex operations and comes with a Core Rule Set (CRS) which has rules for many exploits. For Apache, it is loaded as an additional module which makes it easy to install and configure. In this tutorial, you will learn how to install and configure ModSecurity and create custom rules.

Read more
Alpine Linux edge — privoxy — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — privoxy — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.0.33-r0 📖 ~4 min read  •  Source: Alpine secdb entry — privoxy 3.0.33-r0 Related CVEs: CVE-2021-44540 CVE-2021-44541 CVE-2021-44542 CVE-2021-44543 CVE-2021-20272 CVE-2021-20273 CVE-2021-20274 CVE-2021-20275  +9 more Upstream summary: Alpine main repository for vedge ships privoxy 3.0.33-r0 which […]

Read more
Debian 11 — libcompress-raw-bzip2-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libcompress-raw-bzip2-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-1884 Upstream summary: Off-by-one error in the bzinflate function in Bzip2.xs in the Compress-Raw-Bzip2 module before 2.018 for Perl allows context-dependent attackers to cause a denial of service […]

Read more
How To Optimize MySQL Queries with ProxySQL Caching on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Optimize MySQL Queries with ProxySQL Caching on Ubuntu 16.04

ProxySQL is a SQL-aware proxy server that can be positioned between your application and your database to create a caching layer to optimize MySQL queries. In this tutorial, you will use ProxySQL to set up transparent caching for a MySQL server on Ubuntu 16.04. You will then test its performance using mysqlslap with and without caching to demonstrate the effect of caching and how much time it can save when executing many similar queries.

Read more
Arch Linux — jre11-openjdk-headless — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — jre11-openjdk-headless — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202107-53 Related CVEs: CVE-2021-2388 CVE-2021-2369 CVE-2021-2341 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 11.0.11.u9-1. Fixed in: 11.0.12.u7-1. Group: AVG-2189. Table of contents Symptom & Impact Environment & Reproduction Root […]

Read more
Debian 11 — pastescript — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — pastescript — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-0878 Upstream summary: Paste Script 1.7.5 and earlier does not properly set group memberships during execution with root privileges, which might allow remote attackers to bypass intended file-access […]

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

Oracle Linux 8 — curl — vulnerability — patch and remediation guide (ELSA-2022-5313)

🟡 Medium   ⏱ 10–30 min  Last verified: 14 April 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5313 Related CVEs: CVE-2022-27776 CVE-2022-22576 CVE-2022-27782 CVE-2022-27774 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

Read more
AlmaLinux 8 — ipset — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — ipset — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2019:3593 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

Read more
CHAT