Introduction to Docker Containerization
Learn how to package multi-service web applications into lightweight, isolated Docker containers with docker-compose.
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Linux Server Hardening: Essential Security
Configure UFW firewalls, disable root password logins, set up Fail2ban, and audit open network ports.
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Database Tuning: Optimizing MySQL for Scale
Fine-tuning buffer pools, slow query logging, query caching strategies, and indexing for high-traffic environments.
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Git & Version Control for Sysadmins
Managing Infrastructure-as-Code, configuration files, and automated deployment webhooks with Git.
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Automating Server Backups with Cron & S3
Write robust shell scripts to snapshot databases, tarball web roots, and encrypt offsite cloud backups.
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Load Balancing Basics: Scaling Web Apps
Distribute HTTP traffic across backend clusters using round-robin, least connections, and health checks.
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Server Monitoring with Prometheus & Grafana
Deploy node_exporter, set up real-time memory/CPU alert thresholds, and visualize cluster telemetry.
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Secure Nginx Reverse Proxy & SSL
Setting up Let's Encrypt Certbot auto-renewal, HTTP/2 multiplexing, and SSL cipher suites.
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SSH Best Practices: Keys & Hardening
Configuring ed25519 keypairs, disabling password authentication, and custom port protection.
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Understanding Linux File Permissions
Mastering chmod, chown, SUID, SGID, sticky bits, and Access Control Lists (ACLs).
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