Operations

How to Set Up DHCP Audit Logging on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up DHCP Audit Logging on Windows Server 2022

How to Install Redis on Windows Server 2022 Redis is an in-memory data structure store used as a database, cache, message broker, and streaming engine. While Redis is natively a Linux application, it runs on Windows Server 2022 through several supported approaches: using Memurai (a Redis-compatible server built for Windows), running official Redis inside Windows […]

Read more
Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2022-10022)

🟠 High   ⏱ 15–60 min  Last verified: 23 December 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-10022 Related CVEs: CVE-2022-1184 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
AlmaLinux 9 — bcel — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — bcel — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2023:0005 Related CVEs: CVE-2022-42920 Upstream summary: The Byte Code Engineering Library (Apache Commons BCEL) is intended to give users a convenient way to analyze, create, and manipulate (binary) Java class files (those […]

Read more
Oracle Linux 9 — grub2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — grub2 — vulnerability — patch and remediation guide (ELSA-2022-5099)

🟠 High   ⏱ 15–60 min  Last verified: 23 December 2022 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5099 Related CVEs: CVE-2021-3695 CVE-2022-28737 CVE-2022-28734 CVE-2022-28736 CVE-2021-3696 CVE-2021-3697 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

Read more
Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2022-10022)

🟠 High   ⏱ 15–60 min  Last verified: 23 December 2022 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-10022 Related CVEs: CVE-2022-1184 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
How to Configure Network Interface Settings with nmcli on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Network Interface Settings with nmcli on RHEL 8

NetworkManager is the default network management stack on RHEL 8, and nmcli is its fully-featured command-line interface. Using nmcli, administrators can create, modify, activate, and delete network connections entirely from the terminal — no GUI or .ifcfg file editing required. This tutorial covers inspecting current network state, configuring a static IP address, managing connections, and […]

Read more
Debian 11 — bsdgames — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — bsdgames — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-1539 CVE-2006-1744 Upstream summary: Multiple buffer overflows in the checkscores function in scores.c in tetris-bsd in bsd-games before 2.17-r1 in Gentoo Linux might allow local users with games […]

Read more
Debian 11 — dstat — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — dstat — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3894 Upstream summary: Multiple untrusted search path vulnerabilities in dstat before 0.7.0 allow local users to gain privileges via a Trojan horse Python module in (1) the current […]

Read more
Common Problems 117926

Ubuntu 18.04 LTS – apt lock contention from unattended-upgrades blocks installs – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 22 December 2022 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 […]

Read more
Debian 11 — mgt — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — mgt — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4972 Upstream summary: mailgo in mgt 2.31 allows local users to overwrite arbitrary files via a symlink attack on a /tmp/mailgo##### temporary file. Table of contents Symptom & […]

Read more
CHAT