Linux

Cómo instalar y configurar VNC en Debian 9 — step-by-step Linux tutorial on Progressive Robot

Cómo instalar y configurar VNC en Debian 9

Virtual Network Computing, o VNC, es un sistema de conexión que le permite usar su teclado y mouse para interactuar con un entorno de escritorio gráfico en un servidor remoto. Hace que administrar archivos, software y ajustes en un servidor remoto sea más fácil para los…

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How to Configure GitLab CI/CD Pipelines on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure GitLab CI/CD Pipelines on RHEL 8

GitLab CI/CD is built directly into the GitLab platform, making it straightforward to automate builds, tests, and deployments without installing a separate CI server. Pipelines are defined in a .gitlab-ci.yml file committed to your repository, and they execute on GitLab Runners — lightweight agents that can run on bare metal, virtual machines, or inside Docker […]

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Oracle Linux 8 — dovecot — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dovecot — security and stability fixes — required update (ELSA-2021-1887)

🟡 Medium   ⏱ 10–30 min  Last verified: 19 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1887 Related CVEs: CVE-2020-24386 CVE-2020-25275 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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Common Problems 119002

Ubuntu 14.04 LTS excessive swap usage causes severe slowdown

🟡 Medium   ⏱ 5–30 min  Last verified: 19 December 2020 Affected versions: 14.04 LTS 📖 ~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 115622

RHEL 7 – yum-cron Service Not Applying Scheduled Security Updates

🟡 Medium   ⏱ 5–30 min  Last verified: 19 December 2020 📖 ~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 — perl-DBI — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — perl-DBI — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:1620-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-20919 CVE-2020-14392 CVE-2020-14393 CVE-2014-10401 CVE-2014-10402 Upstream summary: An issue was discovered in the DBI module before 1.643 for Perl. The hv_fetch() documentation requires checking for […]

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Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-0577)

🟠 High   ⏱ 15–60 min  Last verified: 19 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0577 Related CVEs: CVE-2020-6792 CVE-2020-6793 CVE-2020-6798 CVE-2020-6795 CVE-2020-6794 CVE-2020-6800 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How To Secure Nginx with Let's Encrypt on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Secure Nginx with Let’s Encrypt on Ubuntu 14.04

In this tutorial, we will show you how to use Let’s Encrypt to obtain a free SSL certificate and use it with Nginx on Ubuntu 14.04. We will also show you how to automatically renew your SSL certificate. If you’re running a different web server, simply follow your web server’s documentation to learn how to use the certificate with your setup.

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How To Install and Configure OpenLDAP and phpLDAPadmin on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Configure OpenLDAP and phpLDAPadmin on Ubuntu 16.04

In this guide, we will discuss how to install and configure the OpenLDAP server on Ubuntu 16.04. We will then install phpLDAPadmin, a web interface for viewing and manipulating LDAP information. We will secure the web interface and the LDAP service with SSL certificates from Let’s Encrypt, a provider of free and automated certificates.

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