Storage Disk

Common Problems 116582

Ubuntu 24.04 LTS – /var filesystem full breaks package and service operations

🔴 Critical   ⏱ 5–30 min  Last verified: 8 October 2024 Affected versions: Ubuntu 24.04 LTS Ubuntu 24.04 Ubuntu 24.04.1 📖 ~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 […]

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How to Configure sudo and Sudoers on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure sudo and Sudoers on RHEL 9

The sudo (superuser do) tool allows designated users to run commands with elevated privileges without sharing the root password. This is fundamental to the principle of least privilege: each administrator gets exactly the access they need for their role, no more. When access is misconfigured — for example with blanket ALL=(ALL) ALL entries or unsafe […]

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How to Set Up NFS Server on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Set Up NFS Server on FreeBSD 14

Introduction Deploying set up nfs server on freebsd 14 on a FreeBSD 14 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard […]

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Common Problems 116443

Ubuntu 24.04 LTS – snapd service fails and snap applications do not launch

🟠 High   ⏱ 5–30 min  Last verified: 8 October 2024 Affected versions: Ubuntu 24.04 LTS Ubuntu 24.04 Ubuntu 24.04.1 📖 ~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 […]

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How to Use Makefile for Build Automation on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Use Makefile for Build Automation on FreeBSD 14

Introduction FreeBSD 14 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up use makefile for build automation on freebsd 14 on FreeBSD 14 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 […]

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How to Install InfluxDB and Telegraf on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install InfluxDB and Telegraf on RHEL 9

InfluxDB 2.x is a purpose-built time-series database that excels at storing high-cardinality metrics with millisecond precision, while Telegraf is its companion agent that collects metrics from hundreds of input plugins and writes them directly to InfluxDB. Together they form the “TIG stack” backbone when paired with Grafana for visualisation. On RHEL 9, both packages are […]

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How to Set Up Two-Factor Authentication for SSH on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Set Up Two-Factor Authentication for SSH on FreeBSD 14

Introduction Deploying set up two-factor authentication for ssh on freebsd 14 on a FreeBSD 14 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within […]

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How to Deploy a Flask App with Gunicorn on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Deploy a Flask App with Gunicorn on FreeBSD 14

Introduction How to Deploy a Flask App with Gunicorn on FreeBSD 14 is a core administration task for any FreeBSD 14 server operator. FreeBSD 14 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf […]

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Common Problems 114622

RHEL 9: auditd Service Stops and Compliance Logging Gaps

🟡 Medium   ⏱ 5–30 min  Last verified: 27 September 2024 📖 ~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 […]

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How to Configure OSPF with FRRouting on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Configure OSPF with FRRouting on FreeBSD 14

Introduction FreeBSD 14 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up configure ospf with frrouting on freebsd 14 on FreeBSD 14 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 […]

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