Cpu Memory

How to Configure Docker with a Non-Root User on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Docker with a Non-Root User on Debian 9

Introduction This guide explains how to Configure Docker with a Non-Root User 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 […]

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How to Set Up DRBD on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up DRBD on FreeBSD 13

Introduction Deploying set up drbd on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base […]

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How to Install .NET SDK on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install .NET SDK on FreeBSD 13

Introduction Deploying install .net sdk on freebsd 13 on a FreeBSD 13 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base […]

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How to Set Up borgbackup on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up borgbackup on Debian 9

Introduction How to Set Up borgbackup 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 Install Portainer on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Portainer on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install portainer on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]

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How to Configure SSL/TLS with OpenSSL and Self-Signed Certificates on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure SSL/TLS with OpenSSL and Self-Signed Certificates on RHEL 7

How to Configure SSL/TLS with OpenSSL and Self-Signed Certificates on RHEL 7 Encrypting web traffic with SSL/TLS is no longer optional for any server that handles user data, logins, or forms. Even on internal or development servers, a self-signed certificate provides encryption in transit and is far preferable to plain HTTP. On RHEL 7, OpenSSL […]

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Common Problems 117611

Ubuntu 20.04 LTS – PHP-FPM pool crashes under load with memory limit issues – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 7 July 2021 Affected versions: Ubuntu 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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How to Install Zabbix on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Zabbix on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install zabbix on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]

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How to Monitor System Resources with htop, top and vmstat on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Monitor System Resources with htop, top and vmstat on RHEL 7

How to Monitor System Resources with htop, top and vmstat on RHEL 7 Effective system monitoring is the foundation of proactive administration. Whether you are troubleshooting a performance complaint, capacity planning for a growing workload, or simply verifying that a server is running within normal parameters, having command-line resource monitoring tools at your fingertips is […]

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How to Configure the System Timezone on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure the System Timezone on FreeBSD 13

Introduction How to Configure the System Timezone on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet […]

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