How To Use JRuby to Run a Rails Application on Apache Tomcat 7 and Ubuntu 14.04
JRuby is a more resource-efficient way to run a Rails Application. In this tutorial you will learn to:
How To Move a PostgreSQL Data Directory to a New Location on Ubuntu 16.04
Whether you’re adding more space, evaluating ways to optimize performance, or looking to take advantage of other storage features, this tutorial will guide you through relocating PostgreSQL’s data directory.
How To Configure BIND as a Private Network DNS Server on Ubuntu 22.04
In this tutorial, you will set up an internal DNS server using two Ubuntu 22.04 servers. You will use the BIND name server software (BIND9) to resolve private hostnames and private IP addresses. This provides a central way to manage your internal hostnames and private IP addresses, which is indispensable when your environment expands to more than a few hosts.
Ubuntu 18.04 LTS – Java app fails with too many open files
🟠 High ⏱ 5–30 min Last verified: 19 August 2022 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]
Ubuntu 22.04 LTS – netplan apply fails with YAML indentation errors
🟠 High ⏱ 5–30 min Last verified: 19 August 2022 Affected versions: Ubuntu 22.04 LTS Ubuntu 22.04 Ubuntu 22.04.4 📖 ~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 […]
How To Deploy a Laravel Application with Nginx on Ubuntu 16.04
Laravel is one of the most popular open-source web application frameworks written in PHP. It aims to help developers build both simple and complex applications by making frequently-used application tasks (like caching and authentication) easier.
Ubuntu 20.04 — varnish — multiple vulnerabilities (5 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 18 August 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7372-1 Related CVEs: CVE-2022-45060 CVE-2020-11653 CVE-2019-20637 CVE-2021-36740 CVE-2022-23959 Upstream summary: Martin van Kervel Smedshammer discovered that Varnish did not properly sanitize certain HTTP headers. A remote attacker could possibly use […]
Ubuntu 18.04 — python-oslo.utils — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 18 August 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5369-1 Related CVEs: CVE-2022-0718 Upstream summary: It was discovered that oslo.utils incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. Table of contents Symptom […]
Ubuntu 22.04 — opusfile — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 18 August 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5937-1 Related CVEs: CVE-2022-47021 Upstream summary: It was discovered that Opusfile was not properly validating pointer arguments in some of its functions, which could lead to a NULL pointer dereference. […]
Ubuntu 22.04 LTS – filesystem remounted read-only after I/O errors – Fix & Prevention
🔴 Critical ⏱ 5–30 min Last verified: 17 August 2022 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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 […]
