Linux

How to Install Docker Engine on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Docker Engine on RHEL 7

How to Install Docker Engine on RHEL 7 Docker Engine is the industry-standard container runtime that allows you to build, ship, and run applications inside isolated containers. On Red Hat Enterprise Linux 7, installing Docker CE (Community Edition) requires a few extra steps compared to other distributions because RHEL 7 ships with its own container […]

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Common Problems 115006

RHEL 8 XFS Filesystem Remounts Read-Only After I/O Error Burst

🟡 Medium   ⏱ 5–30 min  Last verified: 4 August 2019 📖 ~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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Ubuntu 18.04 — sdl-image1.2 — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — sdl-image1.2 — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 August 2019 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4238-1 Related CVEs: CVE-2018-3977 CVE-2019-12216 CVE-2019-12217 CVE-2019-12218 CVE-2019-12219 CVE-2019-12220 CVE-2019-12221 CVE-2019-12222  +4 more Upstream summary: It was discovered that SDL_image incorrectly handled certain image files. An attacker could possibly use […]

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Ubuntu 14.04 — walinuxagent — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — walinuxagent — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 August 2019 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-3907-1 Related CVEs: CVE-2019-0804 Upstream summary: It was discovered that WALinuxAgent created swap files with incorrect permissions. A local attacker could possibly use this issue to obtain sensitive information from […]

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Oracle Linux 8 — icedtea-web — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — icedtea-web — vulnerability — patch and remediation guide (ELSA-2019-2004)

🟠 High   ⏱ 15–60 min  Last verified: 4 August 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2004 Related CVEs: CVE-2019-10185 CVE-2019-10181 CVE-2019-10182 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 — snack — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — snack — 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-2015:0382-1 (see also SUSE bugzilla) Related CVEs: CVE-2012-6303 Upstream summary: Heap-based buffer overflow in the GetWavHeader function in generic/jkSoundFile.c in the Snack Sound Toolkit, as used in WaveSurfer 1.8.8p4, allows remote attackers […]

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/dev/null in Linux — step-by-step Linux tutorial on Progressive Robot

/dev/null in Linux

/dev/null in Linux is a null device file. This will discard anything written to it, and will return EOF on reading. This is a command-line hack that acts as a vacuum, that sucks anything thrown to it. Let's take a look at understanding what it means, and what we can do with this file. /dev/null […]

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Oracle Linux 8 — GraalVM — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — GraalVM — vulnerability — patch and remediation guide (ELSA-2023-12671)

🟠 High   ⏱ 15–60 min  Last verified: 4 August 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12671 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 […]

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How to Install PHP 7.0 CLI on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install PHP 7.0 CLI on Debian 9

Introduction This guide explains how to Install PHP 7.0 CLI on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with the […]

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