Ubuntu 16.04

Common Problems 118622

cloud-init Stuck or Fails on First Boot

🟡 Medium   ⏱ 5–30 min  Last verified: 16 July 2021 📖 ~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
Ubuntu 16.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 July 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4442-2 Related CVEs: CVE-2018-1000550 CVE-2018-1000671 CVE-2020-10936 Upstream summary: USN-4442-1 fixed vulnerabilities in Sympa. This update provides the corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. […]

Read more
Ubuntu 16.04 — qpdf — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — qpdf — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 10 July 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5026-2 Related CVEs: CVE-2018-18020 CVE-2021-36978 CVE-2015-9252 CVE-2017-11624 CVE-2017-11625 CVE-2017-11626 CVE-2017-11627 CVE-2017-12595  +8 more Upstream summary: USN-5026-1 fixed several vulnerabilities in QPDF. This update provides the corresponding update for Ubuntu 16.04 […]

Read more
Ubuntu 16.04 — libjpeg-turbo — multiple vulnerabilities (15 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libjpeg-turbo — multiple vulnerabilities (15 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 July 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5553-1 Related CVEs: CVE-2018-11813 CVE-2018-14498 CVE-2020-14152 CVE-2020-17541 CVE-2020-13790 CVE-2018-19664 CVE-2018-20330 CVE-2019-2201  +7 more Upstream summary: It was discovered that libjpeg-turbo was not properly handling EOF characters, which could lead to […]

Read more
Common Problems 118597

Ubuntu 16.04 LTS CIFS network share fails to mount at boot

🟡 Medium   ⏱ 5–30 min  Last verified: 2 July 2021 📖 ~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
Common Problems 118420

Ubuntu 16.04 Bluetooth device not detected

🟡 Medium   ⏱ 5–30 min  Last verified: 30 June 2021 📖 ~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
Ubuntu 16.04 — firefox — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

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

🟠 High   ⏱ 15–60 min  Last verified: 28 June 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4926-1 Related CVEs: CVE-2021-23994 CVE-2021-23995 CVE-2021-23996 CVE-2021-23997 CVE-2021-23998 CVE-2021-23999 CVE-2021-24000 CVE-2021-24001  +12 more Upstream summary: Multiple security issues were discovered in Firefox. If a user were tricked into opening a […]

Read more
Ubuntu 16.04 — netty-3.9 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — netty-3.9 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 26 June 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4600-1 Related CVEs: CVE-2019-16869 CVE-2019-20444 CVE-2019-20445 CVE-2020-7238 Upstream summary: It was discovered that Netty had HTTP request smuggling vulnerabilities. A remote attacker could used it to extract sensitive information. (CVE-2019-16869, […]

Read more
How To Create and Serve WebP Images to Speed Up Your Website — step-by-step Linux tutorial on Progressive Robot

How To Create and Serve WebP Images to Speed Up Your Website

WebP is an open image format developed by Google in 2010 based on the VP8 video format that supports both lossy and lossless image compression. In this tutorial, you will use the command-line tool `cwebp` to convert images to WebP format, creating scripts that will watch and convert images in a specific directory. Finally, you’ll explore two ways to serve WebP images to your visitors.

Read more
CHAT