Java Memory Management Explained
A Guide to Java memory management. Dive deep into the JVM Memory Model, Heap, Stack, Garbage Collection, and best practices.
Debian 10 — pacemaker — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 9 March 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2020-25654 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
How To Install, Configure, And Use Modules In The Apache Web Server
Apache is the most popular web server in the world. This guide discusses several modules that may help you get the most out of your server.
Comment installer et utiliser Clickhouse sur Debian 10
L’auteur a choisi le Free and Open Source Fund pour recevoir une donation dans le cadre du programme Write for DOnations. ClickHouse est une base de données…
How To Host a Website with Caddy on Ubuntu 16.04
[Caddy](https://caddyserver.com/) is a web server that was created with ease of use in mind. It’s become a common choice for developers who want to quickly run a website without working out difficult configuration files. In this tutorial, you will build and install Caddy from source, configure it using a `Caddyfile`, install Caddy plugins, and learn how to update your installation of Caddy when a new version is released.
Ubuntu 16.04 — neutron — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 9 March 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4036-1 Related CVEs: CVE-2019-9735 Upstream summary: Erik Olof Gunnar Andersson discovered that OpenStack Neutron incorrectly handled certain security group rules in the iptables firewall module. An authenticated attacker could possibly […]
How To Back Up, Import, and Migrate Your Apache Kafka Data on CentOS 7
Backing up your [Apache Kafka](http://kafka.apache.org/) data is an important practice that will help you recover from unintended data loss or bad data added to the cluster due to user error. In this tutorial, you will back up, import, and migrate your Kafka data on a single CentOS 7 installation as well as on multiple CentOS 7 installations on separate servers.
openSUSE Tumbleweed — vino — multiple vulnerabilities (4 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory SUSE-SR:2011:009 (see also SUSE bugzilla) Related CVEs: CVE-2011-0904 CVE-2011-1164 CVE-2019-15681 CVE-2011-0905 Upstream summary: The rfbSendFramebufferUpdate function in server/libvncserver/rfbserver.c in vino-server in Vino 2.x before 2.28.3, 2.32.x before 2.32.2, 3.0.x before 3.0.2, and […]
Debian 9 — tomcat8 — multiple vulnerabilities (5 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 9 March 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2017-5664 CVE-2017-7674 CVE-2018-8014 CVE-2018-1304 CVE-2019-17569 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]
Facade Design Pattern in Java
Facade Design Pattern is one of the Structural design patterns (such as [Adapter pattern](/community/tutorials/adapter-design-pattern-java "Adapter Design Pattern in Java – Example Tutorial") and [Decorator pattern](/community/tutorials/decorator-design-pattern-in-java-example "Decorator Pattern in Java – Example Tutorial")). Facade design pattern is used to help client applications to easily interact with the system. Facade Design Pattern ![facade design pattern, facade pattern, […]