October 2021 - Page 2 of 69

Configuração inicial de servidor com o Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Configuração inicial de servidor com o Ubuntu 20.04

Ao criar um servidor do Ubuntu 20.04, deve-se executar alguns passos de configuração importantes como parte da configuração básica. Esses passos aumentarão a segurança e a usabilidade do seu servidor e darão a você uma base sólida para ações subsequentes.

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Debian 11 — openjfx — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — openjfx — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-4901 CVE-2015-4906 CVE-2015-4908 CVE-2015-4916 CVE-2016-3498 CVE-2017-10086 CVE-2017-10114 CVE-2018-2581  +5 more Upstream summary: Unspecified vulnerability in Oracle Java SE 8u60 allows remote attackers to affect confidentiality, integrity, and availability […]

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How to Configure Samba on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Samba on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up configure samba on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]

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How To Install Linux, Apache, MySQL, PHP (LAMP) stack On CentOS 6 — step-by-step Linux tutorial on Progressive Robot

How To Install Linux, Apache, MySQL, PHP (LAMP) stack On CentOS 6

This tutorial explains how to install Apache, how to install MySQL, how to change the root MySQL password, how to install PHP, and how to see what libraries are available. LAMP stack is a group of open source software used to get web servers up and running. The acronym stands for Linux, Apache ( the web server) , MySQL (the database), and PHP (the language). This tutorial is written for Centos.

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Ubuntu 20.04 — tcmu — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — tcmu — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4707-1 Related CVEs: CVE-2021-3139 Upstream summary: It was discovered that TCMU lacked a check for transport-layer restrictions, allowing remote attackers to read or write files via directory traversal in an […]

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Height of a Tree Data Structure — step-by-step Programming tutorial on Progressive Robot

Height of a Tree Data Structure

In this tutorial, we'll be discussing Binary Trees. We'll see how to calculate the height of a tree data structure recursively as well as iteratively. Binary Trees Binary Trees are a data structure in which data is stored in a hierarchical manner rather than linear (as it is done in [LinkedList](/community/tutorials/java-linkedlist-linkedlist-java) and Arrays). A Binary […]

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SLES 15 — kernel-livepatch — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — kernel-livepatch — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:3210-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-1000405 CVE-2021-4028 CVE-2021-31440 CVE-2018-12904 CVE-2019-5108 CVE-2018-15471 CVE-2019-13272 CVE-2020-13233  +2 more Upstream summary: The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() […]

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Debian 11 — libpodofo — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libpodofo — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-8981 CVE-2017-5852 CVE-2017-5853 CVE-2017-5854 CVE-2017-5855 CVE-2017-5886 CVE-2017-6840 CVE-2017-6841  +12 more Upstream summary: Heap-based buffer overflow in the PdfParser::ReadXRefSubsection function in base/PdfParser.cpp in PoDoFo allows attackers to have unspecified […]

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