How To Add Custom Fonts to Gatsby
Learn how to load and use custom fonts in Gatsby.js using three different approaches: Typography.js, Fontsource, and managing self-hosted files manually.
How to Install Rust with rustup on Debian 9
Introduction This guide explains how to Install Rust with rustup 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 […]
12 Days of the cloud provider (Day 3) – Checking Birthdays and Sending SMS Notifications
Learn how to use Python and Twilio to check for birthdays and send SMS notifications.
RHEL 7 firewalld Direct Rules Lost After Reload
🟡 Medium ⏱ 5–30 min Last verified: 4 September 2019 Affected versions: RHEL 7 📖 ~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 & […]
How to Configure Prometheus Alerting Rules on SLES 12
Introduction This tutorial covers How to Configure Prometheus Alerting Rules on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install Prometheus zypper install -y golang-github-prometheus-prometheus Step 2 […]
openSUSE Tumbleweed — libHX28 — vulnerability — 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:2010:019 (see also SUSE bugzilla) Related CVEs: CVE-2010-2947 Upstream summary: Heap-based buffer overflow in the HX_split function in string.c in libHX before 3.6 allows remote attackers to execute arbitrary code or cause […]
FreeBSD 12 — py39-psutil — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 4 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: py-psutil — double free vulnerability Related CVEs: CVE-2019-18874 Upstream summary: ret2libc reports: psutil (aka python-psutil) through 5.6.5 can have a double free. This occurs because of refcount mishandling within a […]
RHEL 8 Cockpit Web Console Unreachable After Firewall Policy Change
🟡 Medium ⏱ 5–30 min Last verified: 4 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 […]
Debian 9 — libpng1.6 — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 4 September 2019 Affected versions: Debian 9 (stretch) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2019-7317 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
Ubuntu 16.04 — sigil — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 4 September 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4085-1 Related CVEs: CVE-2019-14452 Upstream summary: Mike Salvatore discovered that Sigil mishandled certain malformed EPUB files. An attacker could use this vulnerability to write arbitrary files to the filesystem. Table […]
