January 2023 - Page 64 of 72

Common Problems 111846

Windows Server 2022 – Windows Admin Center gateway certificate chain incomplete – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Windows Server 2022 📖 ~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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Debian 11 — lightdm-gtk-greeter — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — lightdm-gtk-greeter — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-0979 Upstream summary: The start_authentication function in lightdm-gtk-greeter.c in LightDM GTK+ Greeter before 1.7.1 does not properly handle the return value from the lightdm_greeter_get_authentication_user function, which allows local […]

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What Is a Hypervisor? — step-by-step DevOps tutorial on Progressive Robot

What Is a Hypervisor?

A hypervisor is software that creates, runs, and monitors virtual machines. The hypervisor shares the host’s resources — such as CPU, memory and storage — among various guest VMs. A hypervisor provides the flexibility to run virtual machines that use operating systems different from the one run by the host machine.

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Ubuntu 14.04 — unzip — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — unzip — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5673-1 Related CVEs: CVE-2021-4217 CVE-2022-0529 CVE-2022-0530 https://launchpad.net/bugs/1957077 CVE-2014-9913 CVE-2016-9844 CVE-2018-1000035 CVE-2018-18384  +9 more Upstream summary: It was discovered that unzip did not properly handle unicode strings under certain circumstances. If […]

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How to Set Up NTLM Security on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up NTLM Security on Windows Server 2019

Introduction to NTLM Security NTLM (NT LAN Manager) is a challenge-response authentication protocol used by Windows when Kerberos is not available—for example when accessing resources by IP address instead of hostname, in workgroup environments, or when connecting to legacy systems. While Kerberos is the preferred protocol, NTLM is still present in virtually all Windows environments […]

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Oracle Linux 9 — jackson — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — jackson — vulnerability — patch and remediation guide (ELSA-2023-2312)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-2312 Related CVEs: CVE-2020-36518 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Oracle Linux 8 — ol8addon — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ol8addon — vulnerability — patch and remediation guide (ELSA-2022-24267)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-24267 Related CVEs: CVE-2022-1962 CVE-2022-2880 CVE-2022-2879 CVE-2022-28131 CVE-2022-41715 CVE-2022-30633 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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A Complete Guide to Install Tomcat on Linux — step-by-step Linux tutorial on Progressive Robot

A Complete Guide to Install Tomcat on Linux

URL: https://www.progressiverobot.com/install-tomcat-on-linux/ Let's cover the steps to install Tomcat on Linux today. We have already covered the steps for [installation on CentOS here](/community/tutorials/install-apache-tomcat-9-centos-7). In this tutorial, we'll use Ubuntu to demonstrate the installation. You can follow this tutorial even if you're on a different distribution. To do so, make sure you use the package manager […]

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