🟡 Medium ⏱ 5–30 min Last verified: 9 December 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 […]
Introduction This guide explains how to Configure iptables Packet Filtering 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 […]
How to Automate Backups with rsync and cron on RHEL 7 Reliable backups are the foundation of any serious system administration strategy. On RHEL 7, rsync combined with cron provides a powerful, scriptable, and highly efficient backup solution that requires no commercial software or complex infrastructure. rsync transfers only changed file blocks over the network, […]
Learn what causes SSL connect errors, how to troubleshoot them in browsers, APIs, and CLI tools, and how to fix issues related to certificate validation.
Initial Server Setup with RHEL 7 Setting up a fresh Red Hat Enterprise Linux 7 server correctly from the start is one of the most important steps you can take to ensure long-term security and stability. Whether you have just provisioned a bare-metal machine or a cloud instance, this guide walks you through every essential […]
This tutorial covers how to install git on ubuntu 12.04 via apt-get and from the source. Git is a distributed version control system released to the public in 2005. The program allows for non-linear development of projects, and can handle large amounts of data effectively by storing it on the local server.
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2025:15117-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-1840 Upstream summary: jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x […]
🟠 High ⏱ 15–60 min Last verified: 9 December 2019 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2020:1417-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-13508 Upstream summary: FreeTDS through 1.1.11 has a Buffer Overflow. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]
🟠 High ⏱ 15–60 min Last verified: 9 December 2019 Affected versions: SLES 12 📖 ~4 min read • Source: SUSE advisory SUSE-CU-2019:695-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-7685 CVE-2017-9271 CVE-2019-18900 CVE-2017-7435 CVE-2017-7436 CVE-2017-9269 CVE-2018-20532 CVE-2018-20533 +1 more Upstream summary: The decoupled download and installation steps in libzypp before 17.5.0 could lead to […]
How fast a website will load depends on the size of all of the files that have to be downloaded by the browser. Reducing the size of files to be transmitted can make the website not only load faster, but also cheaper to those who have to pay for their bandwidth usage. In this guide, we’ll discuss how to configure Nginx installed on your Ubuntu 14.04 server to utilize `gzip` compression to reduce the size of content sent to website visitors.
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