Understanding CSS Float
Learn how to use CSS float positioning, as well as some of the pitfalls when using it for layouts on the web.
Oracle Linux 8 — .NET Core 3.1 security and bugfix update (ELSA-2022-6523)
🟡 Medium ⏱ 10–30 min Last verified: 11 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2022-6523 Related CVEs: CVE-2022-38013 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
AlmaLinux 8 — gnome-initial-setup — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALBA-2022:1874 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
Ubuntu 14.04 LTS – SSH sessions reset unexpectedly under load – Fix & Prevention
🟡 Medium ⏱ 5–30 min Last verified: 11 April 2021 Affected versions: Ubuntu 14.04 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 […]
Ubuntu 16.04 LTS iptables rules lost after reboot
🟠 High ⏱ 5–30 min Last verified: 11 April 2021 Affected versions: 16.04 📖 ~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 […]
How to Enable HTTP/2 in Nginx on Oracle Linux 8
Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying enable http/2 in nginx on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Enable HTTP/2 in Nginx on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]
FreeBSD 12 — kafka — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 11 April 2021 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: kafka — Denial Of Service vulnerability Related CVEs: CVE-2020-36518 Upstream summary: NIST reports: jackson-databind before 2.13.0 allows a Java StackOverflow exception and denial of service via a large depth of […]
Ubuntu 20.04 — squashfs-tools — multiple vulnerabilities (2 CVEs) — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 11 April 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5078-3 Related CVEs: CVE-2021-41072 CVE-2021-40153 Upstream summary: USN-5078-1 fixed a vulnerability in Squashfs-Tools. That update was incomplete and could still result in Squashfs-Tools mishandling certain malformed SQUASHFS files. This update […]
Ubuntu 20.04 — linux-oem-5.13 — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 11 April 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5265-1 Related CVEs: CVE-2020-27820 CVE-2021-3640 CVE-2021-3752 CVE-2021-3772 CVE-2021-4001 CVE-2021-4090 CVE-2021-4093 CVE-2021-4202 +12 more Upstream summary: Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during […]
如何在Python3中构造“for循环”
在计算机编程中，运用循环语句可以让我们自动化、重复多次执行相似的任务。在这个教程里，我们将介绍Python中的for循环 一个for循环，对于“代码的重复执行”的实现，是基于循环计数器或循环变量。这意味着：最常使用for循环的情况，是在进入循环之前已经知道需要重复的次数。这与“以终止条件决定何时终止循环”的 while 循环 不同。
