Linux

How To Install and Use Composer on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Use Composer on Ubuntu 14.04

Composer is a popular dependency management tool for PHP, created to facilitate installation and update of project dependencies. It will check which other packages a specific project depends on and install them for you, using the appropriate versions according to the project requirements.

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Debian 9 — openconnect — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — openconnect — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 November 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-16239 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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How to Set Up WireGuard VPN on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up WireGuard VPN on RHEL 8

WireGuard is a modern, high-performance VPN protocol built into the Linux kernel since version 5.6, offering significantly simpler configuration and better performance than older alternatives like OpenVPN or IPsec. On RHEL 8, WireGuard can be installed via the ELRepo kernel module or the wireguard-tools package from EPEL, with the kernel module provided by the elrepo-kernel […]

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Arch Linux — libcurl-gnutls — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libcurl-gnutls — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201805-18 Related CVEs: CVE-2018-1000301 CVE-2018-1000300 CVE-2019-5436 CVE-2019-3823 CVE-2019-3822 CVE-2018-16890 CVE-2018-16840 CVE-2018-0500  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 7.59.0-1. Fixed in: 7.60.0-1. Group: AVG-699. Table of contents […]

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Common Problems 115593

RHEL 7 – journald Disk Usage Grows Until /var Is Full

🟡 Medium   ⏱ 5–30 min  Last verified: 18 November 2019 📖 ~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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openSUSE Tumbleweed — kdegraphics3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — kdegraphics3 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SA:2009:024 (see also SUSE bugzilla) Related CVEs: CVE-2009-0146 CVE-2009-3603 Upstream summary: Multiple buffer overflows in the JBIG2 decoder in Xpdf 3.02pl2 and earlier, CUPS 1.3.9 and earlier, and other products allow remote […]

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Настройка брандмауэра с UFW в Debian 9 — step-by-step Linux tutorial on Progressive Robot

Настройка брандмауэра с UFW в Debian 9

UFW (Uncomplicated Firewall или «простой брандмауэр») представляет собой интерфейс iptables, предназначенный для упрощения процесса настройки брандмауэра. Хотя iptables — надежный и гибкий инструмент, начинающим бывает сложно научиться использовать его для правильной настройки…

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