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

An Introduction to SaltStack Terminology and Concepts

Salt, or SaltStack, is a remote execution tool and configuration management system. Its remote execution capabilities allow administrators to run commands on various machines in parallel with a flexible targeting system. In this guide, we will discuss some of the basic concepts and terminology needed to begin learning Salt.

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How to Perform a CIS Benchmark Audit on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Perform a CIS Benchmark Audit on Debian 9

Introduction Deploying perform a cis benchmark audit on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]

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Oracle Linux 8 — nss and nspr security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nss and nspr security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-3572)

🟡 Medium   ⏱ 10–30 min  Last verified: 20 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-3572 Related CVEs: CVE-2020-25648 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 121549

Debian 9 Failed to Fetch Due to Proxy Misconfiguration

🟡 Medium   ⏱ 5–30 min  Last verified: 20 January 2021 Affected versions: Debian 9 📖 ~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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Common Problems 119038

Ubuntu 14.04 LTS Swap Not Activating After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 20 January 2021 📖 ~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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openSUSE Tumbleweed — newsboat — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — newsboat — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-26235 Upstream summary: In Rust time crate from version 0.2.7 and before version 0.2.23, unix-like operating systems may segfault due to dereferencing a dangling pointer […]

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How to Configure AppArmor in Complain Mode on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure AppArmor in Complain Mode on SLES 12

Introduction This tutorial covers How to Configure AppArmor in Complain Mode on SLES 12 on SLES 12. SLES 12 (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. Step 1 — Check AppArmor Status systemctl status apparmor aa-status […]

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