January 2021 - Page 24 of 69

Ubuntu 18.04 — linux-gke-4.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

• January 21, 2021
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4749-1 Related CVEs: CVE-2020-25669 CVE-2020-27815 CVE-2020-27830 CVE-2020-28941 CVE-2020-29374 CVE-2020-29568 CVE-2020-29569 CVE-2020-29660  +12 more Upstream summary: Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. […]

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SLES 15 — libbrotlidec1 — vulnerability — patch and remediation guide

• January 21, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:611-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-8927 Upstream summary: A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" […]

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How To SSH Securely with Kryptonite on the cloud provider

• January 21, 2021
• Linux
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SSH is the primary way of connecting to remote Linux servers. Securing this channel is essential to maintaining a secure infrastructure. Kryptonite is a secure solution to protecting your SSH private key. In this guide, you will generate an SSH key pair with Kryptonite on your phone, pair your phone with your local computer, and use Kryptonite to SSH into a cloud servers.

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Como proteger o Apache com o Let’s Encrypt no Ubuntu 18.04

• January 21, 2021
• Linux
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A Let’s Encrypt é uma autoridade certificadora (CA) que proporciona uma maneira descomplicada de obter e instalar certificados TLS/SSL, gratuitamente,…

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How to Install Elasticsearch on FreeBSD 12

• January 21, 2021
• FreeBSD
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Introduction Deploying install elasticsearch on freebsd 12 on a FreeBSD 12 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + […]

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Comment installer Git sur Ubuntu 20.04

• January 21, 2021
• Linux
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Les systèmes de contrôle version comme Git sont essentiels aux meilleures pratiques de développement logiciel moderne. Le versionnage vous permet de garder une trace de votre logiciel au niveau de la source. Vous pouvez suivre les modifications, revenir aux étapes précédentes…

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Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide (ELSA-2019-1816)

• January 21, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1816 Related CVEs: CVE-2019-2786 CVE-2019-2842 CVE-2019-2745 CVE-2019-2769 CVE-2019-2816 CVE-2019-2762 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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CI/CD Tools Comparison: Jenkins, GitLab CI, Buildbot, Drone, and Concourse

• January 21, 2021
• Devops
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Continuous integration, delivery, and deployment are strategies designed to help increase the velocity of development and the release of well-tested, usable products. In this guide, we will compare some popular free and open-source continuous integration, delivery, and deployment servers designed to make collaborative software development easier. We will take a look at Jenkins, GitLab CI, Buildbot, Drone, and Concourse.

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2020-5714)

• January 21, 2021
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5714 Related CVEs: CVE-2020-12653 CVE-2020-12768 CVE-2020-12657 CVE-2020-12659 CVE-2020-12654 CVE-2020-12464 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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An Introduction to SaltStack Terminology and Concepts

• January 21, 2021
• Tutorials
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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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