Linux

How to Install .NET SDK and Runtime on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install .NET SDK and Runtime on RHEL 8

.NET is Microsoft’s open-source, cross-platform framework for building web APIs, console applications, microservices, and more. RHEL 8 is a fully supported platform for .NET 8, and Microsoft provides a dedicated package repository that integrates cleanly with dnf. This tutorial shows you how to add the Microsoft repository, install the .NET 8 SDK and ASP.NET Core […]

Read more
How To Enable SFTP Without Shell Access on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Enable SFTP Without Shell Access on Ubuntu 16.04

SFTP stands for SSH File Transfer Protocol. As its name suggests, it’s a secure way of transferring files to a server using an encrypted SSH connection. In a standard configuration, the SSH server grants file transfer access and terminal shell access to all users with an account on the system. In this tutorial, we’ll set up the SSH daemon to limit SFTP access to one directory with no SSH access allowed on per user basis.

Read more
openSUSE Tumbleweed — rubygem-passenger — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — rubygem-passenger — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2018-12026 CVE-2014-1831 CVE-2014-1832 CVE-2015-7519 CVE-2016-1247 CVE-2018-12029 CVE-2013-2119 Upstream summary: During the spawning of a malicious Passenger-managed application, SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows […]

Read more
Oracle Linux 8 — httpd:2.4 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — httpd:2.4 — vulnerability — patch and remediation guide (ELSA-2020-3714)

🟠 High   ⏱ 15–60 min  Last verified: 25 January 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-3714 Related CVEs: CVE-2020-9490 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
Common Problems 118101

Ubuntu 18.04 PostgreSQL Service Refuses Connections

🟡 Medium   ⏱ 5–30 min  Last verified: 24 January 2020 📖 ~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 […]

Read more
How to Set Up NFS Server and Client on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up NFS Server and Client on Debian 10

Introduction How to Set Up NFS Server and Client on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]

Read more
openSUSE Tumbleweed — python-pycrypto — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python-pycrypto — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2012:0869-1 (see also SUSE bugzilla) Related CVEs: CVE-2012-2417 CVE-2013-1445 Upstream summary: PyCrypto before 2.6 does not produce appropriate prime numbers when using an ElGamal scheme to generate a key, which reduces the […]

Read more
openSUSE Tumbleweed — hyper-v — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — hyper-v — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-RU-2012:1673-1 (see also SUSE bugzilla) Related CVEs: CVE-2012-2669 CVE-2012-5532 Upstream summary: The main function in tools/hv/hv_kvp_daemon.c in hypervkvpd, as distributed in the Linux kernel before 3.4.5, does not validate the origin of […]

Read more
Debian 9 — neutron — vulnerability — patch and remediation guide — diagnosis and fix on Debian 9

Debian 9 — neutron — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 January 2020 Affected versions: Debian 9 (stretch) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-9735 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
Como instalar o Apache Tomcat 9 no Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

Como instalar o Apache Tomcat 9 no Ubuntu 18.04

O Apache Tomcat é um servidor Web e um contêiner servlet que é usado para atender aos aplicativos Java. O Tomcat é uma implementação de código aberto das tecnologias do Java Servlet e JavaServer Pages, lançadas pela Apache Software Foundation. Este tutorial aborda a instalação…

Read more
CHAT