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Common Problems 118125

Ubuntu 18.04 LTS – Certbot renewal fails because port 80 is in use – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 16 September 2020 Affected versions: Ubuntu 18.04 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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How to Limit Container Resources with cgroups on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Limit Container Resources with cgroups on Debian 10

Introduction Deploying limit container resources with cgroups on debian 10 on a Debian 10 Buster 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 Before […]

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Common Problems 114973

RHEL 8 podman pull fails behind enterprise proxy

🟡 Medium   ⏱ 5–30 min  Last verified: 15 September 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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How to Install SQLite3 on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install SQLite3 on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up install sqlite3 on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the resulting […]

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How to Configure Windows Server 2019 Container Registry — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Container Registry

How to Configure Windows Server 2019 Container Registry A container registry is a repository for storing and distributing container images. In Windows Server 2019 environments, you can deploy an on-premises container registry using the open-source Docker Registry v2 or a Windows-compatible private registry, or integrate with Azure Container Registry. A private registry gives you full […]

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How to Set Up PostgreSQL Streaming Replication on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up PostgreSQL Streaming Replication on Debian 10

Introduction Deploying set up postgresql streaming replication on debian 10 on a Debian 10 Buster 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 You […]

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How to Configure DirectAccess with IPv6 on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure DirectAccess with IPv6 on Windows Server 2012 R2

How to Configure Windows Server 2012 R2 as a VPN Server with SSTP Secure Socket Tunneling Protocol (SSTP) is a VPN protocol that encapsulates PPP traffic inside HTTPS, using port 443 for all VPN data. This makes SSTP the most firewall-friendly VPN protocol available — it works through virtually any firewall, NAT device, or web […]

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

How to Install and Configure RabbitMQ on RHEL 7

How to Install and Configure RabbitMQ on RHEL 7 RabbitMQ is one of the most widely deployed open-source message brokers in the world. It implements the Advanced Message Queuing Protocol (AMQP) and provides reliable message delivery, flexible routing, and support for multiple messaging patterns including work queues, publish/subscribe, and request/reply. Applications use RabbitMQ to decouple […]

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How to Install PHP 7.4 CLI on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install PHP 7.4 CLI on Debian 10

Introduction How to Install PHP 7.4 CLI on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. […]

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How to Set Up Cron Jobs and Scheduled Tasks on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Cron Jobs and Scheduled Tasks on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up cron jobs and scheduled tasks on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each […]

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