Python Find String in List: Complete Guide with Examples
Learn how to find strings in a Python list using methods like in operator, count(), and custom logic. Explore examples, handle errors, and debug issues.
SLES 12 — libnettle4 — multiple vulnerabilities (6 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 19 May 2021 Affected versions: SLES 12 📖 ~4 min read • Source: SUSE advisory SUSE-CU-2021:127-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-20305 CVE-2021-3580 CVE-2015-8803 CVE-2015-8804 CVE-2015-8805 CVE-2016-6489 Upstream summary: A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST […]
openSUSE Tumbleweed — cereal-devel — vulnerability — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE security advisory Related CVEs: CVE-2020-11105 Upstream summary: An issue was discovered in USC iLab cereal through 1.3.0. It employs caching of std::shared_ptr values, using the raw pointer address as a unique identifier. This […]
Oracle Linux 8 — ELSA-2020-5619-1: postgresql:9.6 — vulnerability — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 19 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2020-5619-1 Related CVEs: CVE-2019-10130 CVE-2020-25694 CVE-2020-25695 CVE-2019-10208 CVE-2020-1720 CVE-2020-14350 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
How To Install Metabase on Ubuntu 20.04 with Docker
Introduction Metabase is a Java-based open-source Business Intelligence (BI) tool. It can connect to a number of different databases and has a question builder tool that can hide the complexity of large SQL queries. In this tutorial you will install Metabase using Docker Compose, then install Nginx to act as a reverse proxy for your […]
How to Profile Application Performance with perf on RHEL 7
How to Profile Application Performance with perf on RHEL 7 Performance bottlenecks in production applications are notoriously difficult to diagnose using traditional monitoring tools alone. CPU usage metrics tell you that a system is busy but rarely tell you where the work is happening inside your application. The perf subsystem, built directly into the Linux […]
openSUSE Tumbleweed — npm14 — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2020:0802-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-8174 CVE-2021-22930 CVE-2021-22940 CVE-2021-37701 CVE-2021-37713 CVE-2021-39135 CVE-2020-11080 CVE-2020-7774 +12 more Upstream summary: napi_get_value_string_*() allows various kinds of memory corruption in node < 10.21.0, 12.18.0, and […]
Oracle Linux 8 — glibc security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1585)
🟡 Medium ⏱ 10–30 min Last verified: 18 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-1585 Related CVEs: CVE-2021-3326 CVE-2019-9169 CVE-2019-25013 CVE-2020-27618 CVE-2016-10228 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]
RHEL 7 – Postfix Service Starts but Mail Queue Never Drains
🟡 Medium ⏱ 5–30 min Last verified: 18 May 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 […]
RHEL 8 – Podman Pull Fails Due to Untrusted Registry Certificate
🟡 Medium ⏱ 5–30 min Last verified: 18 May 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 […]
