🐧 Richmond, VA | Linux Administration & Support

Service Specializations

🏗️ System Setup & Management

I handle the foundational heavy lifting so your team doesn’t have to.

• OS Hardening: Secure baseline configurations to prevent unauthorized access.

• Patch Management: Automated kernel updates and dependency resolution.

• Access Control: Precise management of Users, Groups, SSH keys, and sudo policies.

📊 Monitoring & Performance Tuning

I ensure your hardware is utilized to its maximum potential.

• Root Cause Analysis: In-depth log monitoring to identify why a service failed.

• Resource Optimization: Tuning CPU, memory, and disk I/O for high-traffic workloads.

• Capacity Planning: Predicting growth to prevent "disk full" emergencies.

🛡️ Security & Compliance

I protect your data from internal and external threats.

• Firewalling: Expert configuration of iptables, nftables, and ufw.

• Mandatory Access Control: Implementation of SELinux and AppArmor profiles.

• Vulnerability Remediation: Rapid patching against CVEs and automated audit logging.

🔄 Automation & Infrastructure as Code (IaC)

I replace manual, error-prone tasks with reliable code.

• Scripting: Custom Bash and Python automation for daily tasks.

• Orchestration: Configuration management via Ansible and Terraform.

• Containerization: Full support for Docker and Kubernetes (K8s) environments.

🧠 Distribution-Specific Commands

Navigating different Linux families requires knowing the right "language." Here is a quick-start guide for the most common tasks:

🔧 Fixing Common Issues

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

2. Service Won't Start: Always check the journal first: journalctl -u [service_name] -xe.

3. High Load: Use top or htop. Look for processes in the "D" state (Uninterruptible sleep), which usually indicates I/O wait issues.

🧰 The Expert Linux Toolkit

To resolve complex issues, I utilize the industry-standard "Power Tools":

• Networking: nmap, tcpdump, dig, and iproute2 for traffic analysis.

• Performance: iostat, vmstat, netstat, and sar (sysstat).

• Debugging: strace (to see system calls) and gdb (for application crashes).

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

💡 Tips for a Successful Server Setup

• Documentation is King: Always maintain a "runbook" of every custom change made to the default installation.

• Separate Partitions: Never put /home, /var, and / on the same partition. If logs fill up /var, your system won't crash.

• SSH Best Practices: Disable root login, change the default port, and only use SSH Key authentication.

• Test Backups: A backup is only a "hope" until you have successfully performed a restoration test. I validate recovery procedures monthly.