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.
🟢 Low ⏱ 5–15 min Last verified: 9 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: opera — moderately severe issue Upstream summary: Opera reports: Fixed a moderately severe issue, as reported by Attila Suszte. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
Learn how to use Python’s time.sleep() function to pause execution in your scripts. Understand its syntax, use cases, and best practices with examples
Learn how to break out of nested loops in Python, exit specific loop levels using flags, functions, exceptions, and best practices for clean loop control
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 […]
Um método para lidar com grandes conjuntos de dados no modo de exibição é utilizando a técnica de rolagem infinita — onde mais dados vão sendo carregados à medida que o usuário continua rolando a página próximo ao fim dela. Essa é a técnica usada na exibição de resultados no Google Imagens. Neste tutorial, veremos como construir um componente de paginação personalizada com o React para paginar grandes conjuntos de dados. Construiremos uma visualização paginada sobre os países no mundo.
