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# sysadmin

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💬 Understanding VoIP and IP PBX: The Backbone of Modern Business Communication

💬 Understanding VoIP and IP PBX: The Backbone of Modern Business Communication

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3 min read
Secure SSH Access with Modular Policy Files
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Secure SSH Access with Modular Policy Files

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5 min read
Linux Reboot Commands Explained: A Practical Guide

Linux Reboot Commands Explained: A Practical Guide

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2 min read
🐧 Tech Support Series: Fixing a Slow Linux System

🐧 Tech Support Series: Fixing a Slow Linux System

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6 min read
🛡️ Blocking Admin SSH Logins with SELinux (`ssh_sysadm_login`)
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🛡️ Blocking Admin SSH Logins with SELinux (`ssh_sysadm_login`)

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3 min read
Your Servers Deserve Better: Meet Minexus, a Smart Admin Agent System in Go

Your Servers Deserve Better: Meet Minexus, a Smart Admin Agent System in Go

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2 min read
Beginner IT Lab Portfolio: Linux, Web Hosting, SSH & User Management in VirtualBox
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Beginner IT Lab Portfolio: Linux, Web Hosting, SSH & User Management in VirtualBox

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5 min read
Secure SSH by Using a Restricted User: Smarter Linux Hardening
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Secure SSH by Using a Restricted User: Smarter Linux Hardening

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1 min read
Deadman Checks in Grafana

Deadman Checks in Grafana

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3 min read
RAID 5 VS SHR Synology NAS

RAID 5 VS SHR Synology NAS

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1 min read
Pydantic 2: The Complete Guide for Python Developers - From Basics to Advanced Techniques

Pydantic 2: The Complete Guide for Python Developers - From Basics to Advanced Techniques

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25 min read
Deploying a Secure LEMP Stack on Stack on Linux (Week 1)
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Deploying a Secure LEMP Stack on Stack on Linux (Week 1)

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5 min read
One Linux Command to Rule Them All
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One Linux Command to Rule Them All

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1 min read
🧩 Visualize Your Azure Dependencies in Real Time with Service Map
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🧩 Visualize Your Azure Dependencies in Real Time with Service Map

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1 min read
🧩 Getting Started with Jinja2 Templates and Filters in Ansible (with Real Examples)
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🧩 Getting Started with Jinja2 Templates and Filters in Ansible (with Real Examples)

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1 min read
Citrix MCS Full Clone Disk Moves in XenServer: What the Docs Won’t Tell You

Citrix MCS Full Clone Disk Moves in XenServer: What the Docs Won’t Tell You

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2 min read
🛡️ Complete Guide to Fail2Ban: Protect Your SSH Server from Brute Force Attacks
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🛡️ Complete Guide to Fail2Ban: Protect Your SSH Server from Brute Force Attacks

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5 min read
Landing From Clouds: Why On-Premise Will Eventually Win... In a Large Number of Cases
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Landing From Clouds: Why On-Premise Will Eventually Win... In a Large Number of Cases

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7 min read
Understanding Networking Commands - Why They Matter
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Understanding Networking Commands - Why They Matter

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4 min read
🔐 How to Set Up Multi-Factor Authentication (MFA) on Ubuntu for SSH
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🔐 How to Set Up Multi-Factor Authentication (MFA) on Ubuntu for SSH

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4 min read
BackupSync: A Comprehensive Linux Backup Solution for Developers and SysAdmins
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BackupSync: A Comprehensive Linux Backup Solution for Developers and SysAdmins

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3 min read
🔐 Mastering SSH Key-Based Authentication: Secure Passwordless Login for Linux and Windows
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🔐 Mastering SSH Key-Based Authentication: Secure Passwordless Login for Linux and Windows

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4 min read
System Performance Monitoring
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System Performance Monitoring

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3 min read
Fixing NO_PUBKEY GPG Errors on Ubuntu – The Cleanest Way

Fixing NO_PUBKEY GPG Errors on Ubuntu – The Cleanest Way

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1 min read
Limiting SSH Access with TCP Wrappers, AllowUsers, and IP Restrictions
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Limiting SSH Access with TCP Wrappers, AllowUsers, and IP Restrictions

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3 min read
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