Linux

How to Set Up Port Knocking on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Port Knocking on CentOS Stream 9

Introduction This tutorial demonstrates how to Set Up Port Knocking on CentOS Stream 9 on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the […]

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AlmaLinux 8 — hplip — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — hplip — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2019:3465 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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AlmaLinux 8 — junit5 — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — junit5 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2020:5097 Upstream summary: Eclipse is an integrated development environment (IDE). The metadata for the eclipse:rhel8 module has been updated to remove the following unused profiles: c everything To check whether you have […]

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Debian 10 — h2database — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — h2database — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 January 2022 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-42392 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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Debian 11 — weechat-scripts — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — weechat-scripts — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-4398 Upstream summary: Multiple CRLF injection vulnerabilities in the (1) now-playing.rb and (2) xmms.pl 1.1 scripts for WeeChat allow user-assisted remote attackers to execute arbitrary IRC commands via […]

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Установка и настройка Zabbix для безопасного мониторинга удаленных серверов в Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Установка и настройка Zabbix для безопасного мониторинга удаленных серверов в Ubuntu 20.04

Автор выбрал Computer History Museum для получения пожертвования в рамках программы Write for DOnations. Zabbix — это программное обеспечение с открытым исходным кодом для мониторинга сетей и…

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Debian 11 — libcgi-application-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libcgi-application-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 10 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-7329 Upstream summary: The CGI::Application module before 4.50_50 and 4.50_51 for Perl, when run modes are not specified, allows remote attackers to obtain sensitive information (web queries and […]

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Debian 11 — py-lmdb — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — py-lmdb — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 10 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-16224 CVE-2019-16225 CVE-2019-16226 CVE-2019-16227 CVE-2019-16228 Upstream summary: An issue was discovered in py-lmdb 0.97. For certain values of md_flags, mdb_node_add does not properly set up a memcpy destination, […]

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