February 2021 - Page 3 of 62

How to Use Capsicum Sandboxing on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Use Capsicum Sandboxing on FreeBSD 12

Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up use capsicum sandboxing on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. […]

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Oracle Linux 8 — mariadb:10.5 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — mariadb:10.5 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-5826)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 đź“– ~4 min read  â€˘  Source: ELSA advisory ELSA-2022-5826 Related CVEs: CVE-2021-46659 CVE-2022-27378 CVE-2022-27384 CVE-2022-27458 CVE-2022-27382 CVE-2022-27445 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118607

Ubuntu 16.04 LTS unattended-upgrades lock blocks apt and dpkg

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 đź“– ~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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Common Problems 113029

Windows Server 2016 – Hyper-V virtual switch loses uplink after NIC driver update – Fix & Prevention

đźź  High   ⏱ 5–30 min  Last verified: 18 May 2026 Affected versions: Windows Server 2016 đź“– ~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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openSUSE Tumbleweed — python36-django-registration — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-django-registration — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed đź“– ~4 min read  â€˘  Source: SUSE advisory openSUSE-SU-2021:0588-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-21416 Upstream summary: django-registration is a user registration package for Django. The django-registration package provides tools for implementing user-account registration flows in the Django web […]

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Common Problems 112504

Windows Server 2019 — UPN suffix routing fails for users in trusted forest — Fix & Prevention

đźź  High   ⏱ 5–30 min  Last verified: 06 July 2027 Affected versions: Windows Server 2019 đź“– ~2 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 Set Up Software RAID with mdadm on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Configure Samba File Sharing on Ubuntu 26.04

Samba implements the SMB/CIFS protocol on Linux, enabling file and printer sharing with Windows, macOS, and other Linux machines. It is the standard way to create Linux-based file servers accessible to Windows clients. This guide configures Samba on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS A user with […]

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How to Set Up Buildkite Agent on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Buildkite Agent on Oracle Linux 8

Introduction Setting up set up buildkite agent on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Buildkite Agent on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to […]

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Mockito Mock Void Method — step-by-step Programming tutorial on Progressive Robot

Mockito Mock Void Method

URL: https://www.progressiverobot.com/mockito-mock-void-method/ Most of the times Mockito when() method is good enough to mock an object's behavior. But when we have to mock a void method, we can't use when(). Mockito Mock Void Method Mockito provides following methods that can be used to mock void methods. doAnswer(): We can use this to perform some operations […]

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