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How to Use proctools on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Use proctools on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use proctools on IBM AIX 7.3 with practical examples […]

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How to Install Docker CE on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Docker CE on Debian 9

Introduction How to Install Docker CE on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. This […]

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How to Set Up Suricata IDS/IPS on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up Suricata IDS/IPS on Debian 11

Introduction This guide explains how to Set Up Suricata IDS/IPS on Debian 11 on Debian 11 Bullseye. Debian Bullseye 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 11 install with the […]

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How to Use SMIT to Manage System Tasks on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Use SMIT to Manage System Tasks on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use smit to manage system tasks on IBM AIX […]

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How to Set Up pgBouncer Connection Pooler on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up pgBouncer Connection Pooler on Debian 11

Introduction Deploying set up pgbouncer connection pooler on debian 11 on a Debian 11 Bullseye machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure […]

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How to Set Up AIX System Resource Controller (SRC) Subsystems on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Set Up AIX System Resource Controller (SRC) Subsystems on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to set up aix system resource controller (src) subsystems on […]

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Common Problems 120695

Debian 11 Cron Job Not Running at Scheduled Time

🟡 Medium   ⏱ 5–30 min  Last verified: 28 September 2022 Affected versions: Debian 11 📖 ~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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Debian 11 — pykerberos — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — pykerberos — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 September 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-3206 Upstream summary: The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows remote attackers to cause a denial of service […]

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How to Install Rancher Desktop on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install Rancher Desktop on Debian 11

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up install rancher desktop on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each step carefully and the […]

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Common Problems 118092

Ubuntu 18.04 LTS Nginx returns 502 Bad Gateway to upstream

🟡 Medium   ⏱ 5–30 min  Last verified: 27 September 2022 📖 ~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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