August 2021 - Page 62 of 69

Ubuntu 20.04 — axel — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — axel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4872-1 Related CVEs: CVE-2020-13614 Upstream summary: It was discovered that Axel did not properly verify the certificates for hostnames. An attacker could use this vulnerability to impersonate another server and […]

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Como Configurar Chaves SSH no Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

Como Configurar Chaves SSH no Ubuntu 18.04

SSH, ou shell seguro, é um protocolo criptografado usado para administrar e comunicar com servidores. Ao trabalhar com um servidor Ubuntu, é provável que você passe a maior parte do tempo em uma sessão de terminal, conectado ao seu servidor através do SSH. Neste guia, vamos…

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How to Install and Configure Envoy Proxy on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install and Configure Envoy Proxy on RHEL 7

How to Install and Configure Envoy Proxy on RHEL 7 Envoy Proxy has become a cornerstone of modern service mesh architectures, used as the data plane in Istio, the sidecar in Consul Connect, and the edge proxy behind many large-scale APIs. Written in C++ and designed for cloud-native workloads, Envoy provides L4/L7 load balancing, health […]

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Apache Basics: Installation and Configuration Troubleshooting — step-by-step Web Servers tutorial on Progressive Robot

Apache Basics: Installation and Configuration Troubleshooting

The Apache web server is an open-source web server popular for its flexibility, power, and widespread support. In this guide, we’ll go over some common procedures for managing the Apache server, including stopping, starting, and enabling the service, working with virtual host files and directories, and locating important files and directories on your server.

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AlmaLinux 8 — ansible-pcp — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — ansible-pcp — 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-2022:1843 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 […]

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Oracle Linux 8 — dotnet5.0 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet5.0 security and bugfix update (ELSA-2021-0476)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0476 Related CVEs: CVE-2021-1721 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 124110

Tmpfs /tmp Fills During Package Build and Breaks Pipelines

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Oracle Linux 10 📖 ~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 […]

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