Linux

How To Install Java on CentOS, Rocky Linux, RHEL, and Fedora — step-by-step Linux tutorial on Progressive Robot

How To Install Java on CentOS, Rocky Linux, RHEL, and Fedora

  • March 11, 2023
  • Linux
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This tutorial will show you how to install Java on current versions of RPM-based Linux distributions: Red Hat Enterprise Linux, CentOS, Fedora, and Rocky Linux. Java is a popular programming language and software platform that allows you to run many server-side applications. This tutorial covers installing the latest, default version of Java, as well as cherry-picking any older versions for installation, and switching between multiple versions in your environment as needed.

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Oracle Linux 9 — keylime — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — keylime — vulnerability — patch and remediation guide (ELSA-2022-8444)

  • March 11, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 11 March 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-8444 Related CVEs: CVE-2022-3500 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Oracle Linux 9 — sysstat — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — sysstat — security and stability fixes — required update (ELSA-2023-6569)

  • March 10, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 March 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6569 Related CVEs: CVE-2023-33204 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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AlmaLinux 8 — unit-api — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — unit-api — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • March 10, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2022:0290 Related CVEs: CVE-2021-4104 CVE-2022-23302 CVE-2022-23305 CVE-2022-23307 Upstream summary: Parfait is a Java performance monitoring library that collects metrics and exposes them through a variety of outputs. It provides APIs for extracting […]

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Common Problems 117401

Ubuntu 20.04 LTS DNS Resolution Fails Intermittently

  • March 10, 2023
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 10 March 2023 Affected versions: 20.04 LTS 📖 ~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 & […]

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AlmaLinux 8 — parfait — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — parfait — multiple vulnerabilities (4 CVEs) — patch and remediation guide

  • March 10, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2022:0290 Related CVEs: CVE-2021-4104 CVE-2022-23302 CVE-2022-23305 CVE-2022-23307 Upstream summary: Parfait is a Java performance monitoring library that collects metrics and exposes them through a variety of outputs. It provides APIs for extracting […]

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CentOS Stream 9 — libguestfs — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — libguestfs — vulnerability — patch and remediation guide

  • March 10, 2023
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 10 March 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2022:7958 Related CVEs: CVE-2022-2211 Upstream summary: The libguestfs packages contain a library used for accessing and modifying virtual machine disk images. Security Fix(es): * libguestfs: Buffer overflow in get_keys leads to […]

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How To Set Up SSH Keys on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Set Up SSH Keys on Ubuntu 16.04

  • March 10, 2023
  • Linux
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SSH-key-based authentication provides a more secure alternative to password-based authentication. In this tutorial we’ll learn how to set up SSH key-based authentication on an Ubuntu 16.04 installation.

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Amazon Linux 2 — kernel-livepatch-5.10.82-83.359 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-5.10.82-83.359 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • March 10, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2022-076 Related CVEs: CVE-2021-4155 CVE-2022-0185 Upstream summary: A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned […]

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