🟡 Medium ⏱ 5–30 min Last verified: 28 April 2024 📖 ~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 […]
PostgreSQL does not include built-in primary election or automatic failover — that is where Patroni comes in. Patroni is a Python-based template for HA PostgreSQL using a distributed configuration store (DCS) such as etcd to coordinate which node is the primary at any given time. When the primary fails, Patroni automatically elects a new primary […]
iptables has been the standard Linux packet-filtering firewall for over two decades, and while RHEL 9 ships with nftables and firewalld as the preferred tools, iptables remains available and is widely understood by seasoned administrators. Learning iptables gives you deep insight into how Linux netfilter works and is valuable for managing legacy systems or containers […]
🟢 Low ⏱ 5–15 min Last verified: 21 April 2024 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: Borg (Backup) — flaw in cryptographic authentication scheme in Borg allowed an attacker to fake archives and indirectly cause backup data loss. Related CVEs: CVE-2023-36811 Upstream summary: Thomas Waldmann reports: […]
🟡 Medium ⏱ 5–30 min Last verified: 17 April 2024 📖 ~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 […]
🟠 High ⏱ 5–30 min Last verified: 15 April 2024 Affected versions: FreeBSD 14 📖 ~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 & […]
🟢 Low ⏱ 5–15 min Last verified: 11 April 2024 Affected versions: FreeBSD 14 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: Borg (Backup) — flaw in cryptographic authentication scheme in Borg allowed an attacker to fake archives and indirectly cause backup data loss. Related CVEs: CVE-2023-36811 Upstream summary: Thomas Waldmann reports: […]
🟡 Medium ⏱ 5–30 min Last verified: 4 April 2024 📖 ~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 […]
🟡 Medium ⏱ 5–30 min Last verified: 31 March 2024 📖 ~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 […]
Docker containers are ephemeral by default — all data written inside a container is lost when the container is removed. Docker provides two mechanisms for persisting data and sharing files between containers and the host: volumes (managed by Docker, stored in /var/lib/docker/volumes/) and bind mounts (map a host directory directly into a container). Volumes are […]
