ubuntu

Ubuntu 22.04 — rustc — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — rustc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 June 2026 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8168-1 Related CVEs: CVE-2026-33056 Upstream summary: It was discovered that tar-rs embedded in rustc incorrectly handled symlinks when unpacking a tar archive. If a user or automated system were tricked […]

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Common Problems 116117

Ubuntu 26.04 LTS – chrony service not syncing after VM resume – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 29 June 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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 […]

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Common Problems 115895

Ubuntu 26.04 LTS – APT lock file prevents package installs – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 29 June 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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 […]

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Ubuntu 18.04 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — dnsmasq — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 29 June 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8268-1 Related CVEs: CVE-2026-4890 CVE-2026-4891 CVE-2026-2291 CVE-2026-4892 CVE-2026-5172 CVE-2026-4893 CVE-2023-28450 CVE-2023-50387  +12 more Upstream summary: Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate […]

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Common Problems 115947

Ubuntu 26.04 LTS – systemd-resolved DNS lookup intermittently fails – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 June 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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 […]

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Ubuntu 16.04 — roundcube — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — roundcube — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 June 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8223-1 Related CVEs: CVE-2024-38357 CVE-2024-38356 CVE-2024-42008 CVE-2024-42010 CVE-2026-26079 CVE-2026-25916 CVE-2019-15237 CVE-2017-8114  +12 more Upstream summary: It was discovered that Roundcube Webmail mishandled Punycode xn-- domain names. An attacker could possibly […]

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How to Set Up a DNS Server with Bind9 on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Rust on Ubuntu 26.04

Rust is a systems programming language that guarantees memory safety without a garbage collector through its borrow checker. It is used for WebAssembly, operating systems, game engines, and high-performance network services. This guide installs Rust via rustup on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS A user account […]

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How to Set Up Software RAID with mdadm on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Automate Backups with rsync and cron on Ubuntu 26.04

rsync is an efficient file synchronisation tool that only transfers changed portions of files, making it ideal for incremental backups. Combined with cron for scheduling and SSH for remote transfers, rsync provides a robust, scriptable backup solution. This guide automates backups on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 […]

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How to Set Up Software RAID with mdadm on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install Netdata on Ubuntu 26.04

Netdata is an open-source, real-time performance monitoring tool that provides per-second metrics for CPUs, RAM, disks, network, processes, and hundreds of applications out of the box. It requires zero configuration to get started. This guide installs Netdata on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS A user with […]

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