Built-in Pipes in Angular
Learn about the built-in pipes available in Angular 2+: async, currency, decimal, date, json, percent, slide, lowercase & uppercase.
Apache returns 503 because php-fpm is down
🟡 Medium ⏱ 5–30 min Last verified: 25 September 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 […]
How to Install and Use tmux on Debian 9
Introduction This guide explains how to Install and Use tmux on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with the […]
openSUSE Tumbleweed — xdm — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2013-2179 Upstream summary: X.Org xdm 1.1.10, 1.1.11, and possibly other versions, when performing authentication using certain implementations of the crypt API function that can return […]
Command-line Basics: Shutdown and Reboot
Learn how to properly shutdown and reboot a system from the command-line using commands like shutdown and reboot.
How to Convert a String to a List in Python: Step-by-Step Guide
Learn Python string concatenation with + operator, join(), format(), f-strings, and more. Explore examples and tips for efficient string manipulation.
openSUSE Tumbleweed — potrace — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2016-8685 CVE-2013-7437 CVE-2017-12067 Upstream summary: The findnext function in decompose.c in potrace 1.13 allows remote attackers to cause a denial of service (invalid memory access […]
FreeBSD 12 — php55-bcmath — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 25 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: php — multiple vulnerabilities Related CVEs: CVE-2016-3074 Upstream summary: The PHP Group reports: BCMath: Fixed bug #72093 (bcpowmod accepts negative scale and corrupts _one_ definition). Exif: Fixed bug #72094 (Out […]
FreeBSD 12 — rubygem19-activemodel — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 25 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: Ruby Activemodel Gem — Circumvention of attr_protected Related CVEs: CVE-2013-0276 Upstream summary: Aaron Patterson reports: The attr_protected method allows developers to specify a blacklist of model attributes which users should […]
openSUSE Tumbleweed — mailman — multiple vulnerabilities (3 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-SR:2011:007 (see also SUSE bugzilla) Related CVEs: CVE-2011-0707 CVE-2015-2775 CVE-2016-6893 Upstream summary: Multiple cross-site scripting (XSS) vulnerabilities in Cgi/confirm.py in GNU Mailman 2.1.14 and earlier allow remote attackers to inject arbitrary web […]