🐧 Nashville, TN | Expert Linux Administration & Support

Comprehensive Service Offerings

I specialize in the following core areas to keep your Linux environment at peak performance:

• ⚙️ System Setup & Management: Full installation, OS hardening, kernel updates, and secure baseline configurations (SSH/sudo).

• 📊 Monitoring & Performance: In-depth tuning for CPU, RAM, and I/O. I perform root cause analysis and proactive capacity planning.

• 🛡️ Security & Compliance: Implementing SELinux/AppArmor, firewall orchestration (iptables/ufw), and rigorous vulnerability remediation.

• 💾 Backup & Reliability: Disaster recovery planning, high-availability (HA) failover clusters, and automated backup validation.

• 🤖 Automation & DevOps: Infrastructure as Code (IaC) using Terraform, configuration management via Ansible, and container orchestration with Kubernetes & Docker.

• 🗄️ Application & Database Support: Expert tuning for web servers (Nginx/Apache), mail servers, and databases (MySQL, PostgreSQL, MongoDB).

🚀 Supported Distributions

I provide expert-level support for all major Linux distributions, including:

• Enterprise: Red Hat Enterprise Linux (RHEL), SUSE Linux Enterprise (SLES), Oracle Linux.

• Community/Server: Ubuntu Server, Debian, CentOS Stream, Rocky Linux, AlmaLinux.

• Specialized: Arch Linux, Fedora, Gentoo, Alpine Linux (for containers), and Slackware.

🧠 Getting Started & Fixing Issues

The Linux Command Swiss Army Knife

Every distribution has its own package manager, but the logic remains the same. Here is how to perform vital tasks across the "Big Three" families:

Common Fixes for Proactive Admins

1. Permission Denied: Use ls -l to check ownership. Fix with chown user:group [file] or chmod 644 [file].

2. Disk Space Full: Run du -sh /* to find the culprit. Often, /var/log is filled with unrotated logs.

3. SSH Connection Refused: Check if the service is running (systemctl status sshd) and ensure Port 22 is open in your firewall (ufw allow 22 or firewall-cmd --add-port=22/tcp).

🧰 The Expert’s Toolbox

To resolve complex issues, I utilize industry-standard diagnostic tools:

• Monitoring: htop, iotop, glances, and Netdata.

• Networking: nmap, tcpdump, dig, and iproute2.

• Debugging: strace (to trace system calls) and journalctl (for deep log inspection).

• Security: Lynis for security auditing and Fail2Ban for intrusion prevention.

💡 Tips for a Successful Server Setup

• Minimalism is Security: Only install the packages you absolutely need. A smaller attack surface is a safer one.

• Automate Everything: Never configure a server manually twice. Use Ansible playbooks to ensure "Configuration Drift" doesn't happen.

• Use Logical Volume Management (LVM): Always set up partitions with LVM. It allows you to resize disks on the fly without unmounting partitions—a lifesaver for growing databases.

• Key-Based Auth Only: Disable password-based SSH logins immediately. Use SSH keys with ed25519 encryption for maximum security.