🐧 Burlington, VT | Linux Administration & Support

Supported Linux Distributions

I provide full-lifecycle 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.

• Cloud/Specialized: Amazon Linux, Fedora, Arch Linux, Alpine Linux, Gentoo.

📑 Comprehensive Service Portfolio

🏗️ System Setup & Management

I handle the heavy lifting of Linux/Unix installation, configuration, and upgrades.

• Secure baseline configuration and OS hardening to prevent unauthorized access.

• Proactive patch management and kernel updates to mitigate zero-day vulnerabilities.

• Granular user, group, and access control management via SSH and sudo policies.

📈 Monitoring, Performance & Troubleshooting

I ensure your hardware is working for you, not against you.

• Performance Tuning: Optimization of CPU, memory, disk, and I/O.

• Root Cause Analysis: Deep-dive log monitoring to identify why a service failed.

• Capacity Planning: Resource optimization to scale your business efficiently.

🛡️ Security & Compliance

I protect your data with industry-leading security frameworks.

• Firewall configuration using iptables and ufw.

• Implementation of Mandatory Access Controls like SELinux and AppArmor.

• Regular backup validation and recovery testing to ensure business continuity.

🤖 Automation & DevOps

I reduce manual overhead through modern Infrastructure as Code (IaC).

• Scripting in Bash and Python for task automation.

• Configuration management via Ansible.

• Containerization and orchestration using Docker, Kubernetes, and Terraform.

👨‍💻 Commands & Common Fixes

To manage diverse distributions, you must understand the "Big Three" package managers.

⚡ Essential Commands by Distribution

🔧 Fixing Common Issues

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

2. Disk Full: Identify large files using du -ah / | sort -rh | head -n 20.

3. Service Won't Start: Check logs immediately using journalctl -u [service_name] -xe.

🧰 The Expert Linux Toolkit

I utilize a professional stack of tools to diagnose and resolve issues:

• Analysis: top, htop, iotop, and glances for real-time resource tracking.

• Networking: nmap for security auditing, tcpdump and Wireshark for packet analysis.

• Storage: fdisk, lsblk, and LVM for volume management.

• Log Management: ELK Stack (Elasticsearch, Logstash, Kibana) or Grep/Sed/Awk for text processing.

💡 Tips for a Successful Server Setup

• Minimalism is Security: Install only the packages you need. A smaller attack surface is a safer one.

• Standardize with Runbooks: Always document your installation steps or use Ansible to ensure every server is a "twin" of the last.

• Monitor Early: Don't wait for a crash. Install monitoring agents (like Prometheus or Zabbix) during the initial setup.

• Separate Partitions: Always put /home, /var, and /tmp on separate partitions to prevent a log-file explosion from crashing the entire OS.