Linux

Common Problems 118522

Ubuntu 16.04 LVM Volume Not Found During Startup

🟡 Medium   ⏱ 5–30 min  Last verified: 22 April 2020 📖 ~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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openSUSE Tumbleweed — python-dulwich — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python-dulwich — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory Related CVEs: CVE-2015-0838 Upstream summary: Buffer overflow in the C implementation of the apply_delta function in _pack.c in Dulwich before 0.9.9 allows remote attackers to execute arbitrary code via a crafted […]

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Common Problems 114948

RHEL 8 Chronyd Not Synchronizing Time With NTP Sources

🟡 Medium   ⏱ 5–30 min  Last verified: 22 April 2020 📖 ~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 Install Perl and CPAN Modules on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install Perl and CPAN Modules on Debian 10

Introduction This guide explains how to Install Perl and CPAN Modules on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]

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Ubuntu 18.04 — kconfig — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — kconfig — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 April 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4100-1 Related CVEs: CVE-2016-6232 CVE-2019-14744 Upstream summary: It was discovered that KConfig and KDE libraries have a vulnerability where an attacker could hide malicious code under desktop and configuration files. […]

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Ubuntu 18.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — sympa — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 22 April 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~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. […]

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How to Install Rust and Compile System Tools on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Rust and Compile System Tools on RHEL 7

How to Install Rust and Compile System Tools on RHEL 7 Rust is a systems programming language that offers memory safety without a garbage collector, making it an ideal choice for building high-performance command-line utilities, daemons, and system-level tools. On RHEL 7, the system compiler and C runtime are older, but Rust’s installer rustup sidesteps […]

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Oracle Linux 8 — virt:ol — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:ol — vulnerability — patch and remediation guide (ELSA-2020-2774)

🟠 High   ⏱ 15–60 min  Last verified: 22 April 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2774 Related CVEs: CVE-2019-20382 CVE-2020-8608 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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openSUSE Tumbleweed — lftp — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — lftp — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2019:1059-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-10916 Upstream summary: It has been discovered that lftp up to and including version 4.8.3 does not properly sanitize remote file names, leading to a […]

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How To Optimize Apache Web Server Performance — step-by-step Linux tutorial on Progressive Robot

How To Optimize Apache Web Server Performance

Apache is an amazingly powerful and capable web server. In order to make initial setup as easy as possible, it comes with numerous modules pre-installed. This makes it a great choice for new projects when you need to quickly be productive, but as your site grows you may start to bump into performance problems. This tutorial will cover a few things you should do to optimize performance if you’re running Apache with your Django app.

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