Posts tagged "sysadmin"

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🧩 Visualize Your Azure Dependencies in Real Time with Service Map

Troubleshooting across multiple Azure VMs and services?Instead of chasing logs and guessing connections, try visualizing them.With Azure Service Map, you can: Automatically discover app-to-app & p...

21.04.2025 0 Read More

Your First Step to a Hardened SSH Server

What is sshd_config - Part 1 of the SSH Security Series As a Linux admin, I use SSH so often it’s practically muscle memory. It’s one of those tools that just works—you open a terminal,...

21.04.2025 0 Read More

Group Management in Linux: The First Step to Becoming a Sysadmin

If you’re thinking about becoming a Linux system administrator, one of the first things you need to understand is group management. Why? Because in a workplace, different departments need different ...

22.04.2025 0 Read More

One Linux Command to Rule Them All

The Combined Power of sos report and sos-vaultTroubleshooting a Linux system can be hard and sosreport makes it a lot simpler, however navigating through the complexity of a sosreport, and fully explo...

24.04.2025 0 Read More

Deploying a Secure LEMP Stack on Stack on Linux (Week 1)

Welcome to Week 1 of the Sysadmin Challenge! In this task, we deploy a secure and production-ready LEMP stack; that’s Linux + Nginx + MySQL + PHP—with a strong focus on hardening, SSL, an...

25.04.2025 0 Read More

Limiting SSH Access with TCP Wrappers, AllowUsers, and IP Restrictions

Securing SSH access is a crucial step in hardening your Linux servers. In our previous discussion, we highlighted the importance of SSH as a secure communication protocol and introduced the sshd_confi...

27.04.2025 0 Read More

System Performance Monitoring

Table of Contents Why Monitoring Matters What to Monitor (Key Performance Metrics) 1. CPU Usage 2. Memory Usage 3. Disk I/O and Storage 4. Network Usage 5. Processes and Services 6. Syste...

03.05.2025 0 Read More

Mastering SSH Key-Based Authentication: Secure Passwordless Login for Linux and Windows

When managing remote servers, SSH (Secure Shell) is the standard for encrypted and secure communication. However, relying on passwords for SSH access leaves your systems vulnerable to: Credential stuf...