How to Use Lambdas in Java
In this tutorial, you will learn to write your lambda expressions. You will also learn to use some built-in Lambdas available in the java.util.function package.
Comment installer un discours sur Ubuntu 18.04
Discourse est une plate-forme de discussion à code source ouvert. Elle peut être utilisée comme une liste de diffusion, un forum de discussion ou un salon de discussion. Dans ce tutoriel,…
How to Set Up a VPN Server with StrongSwan IPsec on RHEL 8
StrongSwan is a robust open-source IPsec VPN solution that supports IKEv2 and is well-suited for site-to-site and remote-access VPN deployments. On RHEL 8, StrongSwan is available through the EPEL repository and integrates cleanly with firewalld and the system’s certificate infrastructure. This tutorial walks through installing StrongSwan, generating PKI certificates, configuring an IKEv2 road-warrior VPN, and […]
Comment sauvegarder, restaurer et migrer une base de données MongoDB sur Ubuntu 20.04
MongoDB est l’un des moteurs de base de données NoSQL les plus populaires. Il doit sa célébrité à son évolutivité, sa puissance, sa fiabilité et sa facilité d’utilisation. Dans cet article, nous allons vous montrer de quelle manière sauvegarder, restaurer et migrer vos bases de données MongoDB.
Ubuntu 20.04 — nfs-utils — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 17 October 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4400-1 Related CVEs: CVE-2019-3689 Upstream summary: It was discovered that the nfs-utils package set incorrect permissions on the /var/lib/nfs directory. An attacker could possibly use this issue to escalate privileges. […]
Oracle Linux 8 – Common Problem 007 – Diagnosis and Fix
🟠 High ⏱ 5–30 min Last verified: 17 October 2020 Affected versions: Oracle Linux 8 📖 ~3 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 […]
Ubuntu 14.04 LTS no space left on device in /var
🟡 Medium ⏱ 5–30 min Last verified: 17 October 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 […]
Ubuntu 18.04 Grub Rescue Prompt After Disk Changes
🟡 Medium ⏱ 5–30 min Last verified: 17 October 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 […]
How to Configure Mandatory Integrity Control on Oracle Linux 8
Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying configure mandatory integrity control on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Mandatory Integrity Control on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]
Windows Server 2016 — SMB access fails because NetBIOS name resolution is broken — Fix & Prevention
🟡 Medium ⏱ 5–30 min Last verified: 17 October 2020 Affected versions: Windows Server 2016 📖 ~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 […]