Linux

How To Set Up Master Slave Replication on PostgreSQL on an Ubuntu 12.04 VPS — step-by-step Linux tutorial on Progressive Robot

How To Set Up Master Slave Replication on PostgreSQL on an Ubuntu 12.04 VPS

PostgreSQL, or postgres, is a popular database management system often used to manage the information from websites and applications. In this guide, we will configure a master server postgres replication set up, which will allow us to replicate the changes from the master server onto the slave. This can be used to distribute reads to multiple machines.

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Oracle Linux 9 — systemd — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — systemd — vulnerability — patch and remediation guide (ELSA-2023-0336)

🟡 Medium   ⏱ 10–30 min  Last verified: 17 February 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0336 Related CVEs: CVE-2022-3821 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Debian 11 — python3.9 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — python3.9 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 17 February 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-20107 CVE-2019-20907 CVE-2020-10735 CVE-2020-26116 CVE-2020-27619 CVE-2021-23336 CVE-2021-28861 CVE-2021-29921  +12 more Upstream summary: In Python (aka CPython) up to 3.10.8, the mailcap module does not add escape characters into […]

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How To Install and Configure Ansible on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Configure Ansible on Ubuntu 20.04

Configuration management systems are designed to streamline the process of controlling large numbers of servers, for administrators and operations teams. They allow you to control many different systems in an automated way from one central location. While there are many…

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How to Add and Delete Users on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Add and Delete Users on RHEL 8

Managing user accounts is one of the most fundamental Linux system administration tasks. On RHEL 8, the standard tools — useradd, usermod, userdel, and groupadd — are all available out of the box and work the same way across RHEL-compatible distributions. This guide covers creating users with meaningful options, setting and changing passwords, modifying existing […]

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Alpine Linux edge — py3-jwt — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — py3-jwt — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.4.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — py3-jwt 2.4.0-r0 Related CVEs: CVE-2022-29217 Upstream summary: Alpine community repository for vedge ships py3-jwt 2.4.0-r0 which addresses CVE-2022-29217. Table of contents Symptom & Impact Environment […]

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Oracle Linux 9 — podman security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — podman security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-6474)

🟡 Medium   ⏱ 10–30 min  Last verified: 16 February 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6474 Related CVEs: CVE-2022-41725 CVE-2022-41723 CVE-2023-29400 CVE-2023-24534 CVE-2023-24539 CVE-2023-3978 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Gentoo Linux — app-text/lesspipe — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-text/lesspipe — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202211-02 Related CVEs: CVE-2022-44542 Upstream summary: lesspipe has support for parsing Perl storable ("PST") files, Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution […]

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Gentoo Linux — net-dns/c-ares — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-dns/c-ares — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202401-02 Related CVEs: CVE-2021-3672 CVE-2021-22930 CVE-2021-22931 CVE-2021-22939 CVE-2021-22940 CVE-2022-4904 CVE-2023-31124 CVE-2023-31130  +3 more Upstream summary: Multiple vulnerabilities have been discovered in c-ares. Please review the CVE identifiers referenced below for details. Table […]

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