A buffer is a space in memory (typically RAM) that stores binary data. In Node.js, we can access these spaces of memory with the built-in Buffer class. Buffers are useful when using JavaScript to interacting with binary data, usually at lower networking levels. In this tutorial, you will use the Node.js REPL to create buffers, read from buffers, write to and copy from buffers, and use buffers to convert between binary data and data encoded with ASCII and UTF-8.
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2013-4111 Upstream summary: The Python client library for Glance (python-glanceclient) before 0.10.0 does not properly check the preverify_ok value, which prevents the server hostname from being verified with […]
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5014-1 Related CVEs: CVE-2021-33909 CVE-2021-3609 https://launchpad.net/bugs/1924611 CVE-2021-29154 CVE-2021-3492 CVE-2021-3493 CVE-2020-27170 CVE-2020-27171 +12 more Upstream summary: It was discovered that the virtual file system implementation in the Linux kernel contained an […]
Introduction This guide explains how to Install Nginx 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 standard repositories […]
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5301-1 Related CVEs: CVE-2022-24407 Upstream summary: It was discovered that the Cyrus SASL SQL plugin incorrectly handled SQL input. A remote attacker could use this issue to execute arbitrary SQL […]
This tutorial will introduce you to a basic HTML document and teach you how to view the source code of an HTML document in a browser.
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5672-1 Related CVEs: CVE-2021-43618 Upstream summary: It was discovered that GMP did not properly manage memory on 32-bit platforms when processing a specially crafted input. An attacker could possibly use […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-1193 Related CVEs: CVE-2021-23991 CVE-2021-23992 CVE-2021-23993 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]
Introduction This guide explains how to Set Up GlusterFS Distributed Storage on Debian 11 on Debian 11 Bullseye. Debian Bullseye 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 11 install with […]
generating a sequence in R
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