Hire the Best Bash Shell Scripting Specialists
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I've been building on Linux since 1994. Worked solely on Odesk/Upwork since April 2009. Linux/UNIX Engineer & Independent Consultant April 2009 – Present Provide high-end cloud architecture, server tuning, critical-incident recovery, and modern data engineering services to global clients. Completed 140+ engagements on Upwork with a perfect 5.0/5.0 feedback rating. AI Data Pipeline & Serverless Warehousing (2025 – 2026): Engineered a serverless data catalog pipeline using Python (BeautifulSoup, requests) to automatically scrape, parse, and clean investigative articles from target web sources [1]. Structured the raw extracted payload into optimized Apache Parquet tables and deployed them directly to Hugging Face Datasets for serverless hosting [1]. Built an interactive search and query dashboard in Gradio, utilizing custom DNS records (ALIAS/CNAME) to map and serve the app securely on DigitalOcean's cloud. Cloud Infrastructure & Migrations (AWS EC2 / VPS): Architected and built high-availability Linux cloud servers on AWS EC2, configured with WHM/cPanel, Concrete5 CMS, and optimized PHP environments. Successfully migrated legacy physical dedicated servers to scalable Virtual Private Servers (VPS) with CentOS/RHEL. Critical System Recovery & Administration: Diagnosed and resolved emergency service outages, including JBOSS server crash failures, Plesk/cPanel software conflicts on legacy CentOS nodes, and data recovery via mounting RAID arrays on FreeBSD. Configured Snort IDS, hardened server network boundaries, and conducted end-to-end performance audits. UNIX Engineer | E Solutions Corporation March 2008 – April 2009 (1 year 2 months) Supported physical operations and infrastructure for a Tier-1 collocation facility. Administered and engineered OpenBSD, FreeBSD, Linux, and Windows server environments daily. Identified and successfully resolved a high volume of network and host-based security vulnerabilities. Stabilized the physical bandwidth billing system for accuracy and provided system-level engineering support to the web development team. UNIX System Engineer | Hilton Grand Vacations (HGVC) November 2006 – March 2008 (1 year 5 months) Served as the single onsite point of operations for all HP-UX, Solaris, FreeBSD, macOS X, and Linux servers. Enterprise Data Warehouse (EDW) Architecture: Designed and built a custom corporate Data Warehouse using RedHat Enterprise Linux, IBM Information Server, and the Sun N1 toolkit. Backported RedHat clustering utilities and GFS modules specifically for RHEL 4 to support database stability. Tailored operating systems to run the IBM Information Server 8 product family, including IBM DB2 V9.3, WebSphere 6.0, DataStage, and QualityStage. Web Presence Engineering: Designed and deployed the company's external web servers on the Solaris 10 platform using Sun T2000 hardware. Leveraged Solaris Zones, hardware RAID, and the ZFS filesystem to isolate and optimize traffic. Authored custom system automation utilities in Perl, C, and the Bourne shell to debug complex kernel and network issues. UNIX Administrator | Vortech, Inc. 2004 – 2006 (2 years) UNIX Administration & Support | Magna Computer Corp September 2003 – May 2004 (9 months) UNIX System Administrator & Network Engineer | Independent Consultant November 2001 – July 2003 Implemented OpenBSD, Linux, and Windows servers in high-density colocation centers. Configured custom web application servers from scratch using Apache, Perl, PHP, and MySQL. Programmed terminal-based console utilities in C and ncurses, utilizing the GTK toolkit and X11 API. Second Level Support | Jobwarehouse May 2001 – September 2001 (5 months) Provided secondary engineering support for primary web servers and high-volume data processing tasks. Education Valencia Community College | 1996 – 1998 | Computer Science & Systems Study Winter Park High School | 1992 – 1996 | Gifted Academic Program Professional Recommendation "Aaron is a very good systems engineer for Linux, UNIX and Windows. He has an in depth understanding of system internals. I found him to be an honorable man that stands behind his word and keeps on track of the project. He would make a good supervisor in any company." — Shelton R., Sr. IT Consultant / DB2 DBA Expert, Xtivia (worked directly with Aaron at HGVC)

Driven and self-reliant software developer with a robust background in IT, and proven communication skills. Brings a wealth of experience in the managed IT, reprographic, manufacturing, and library industries. Known for sharing insights gained from this background to improve operational maturity. I'm skilled at bringing technological solutions to business problems.

Summary. DevOps Engineer, Linux System Administrator, and Web Developer with 5+ years of experience building and maintaining reliable production environments. I help businesses automate deployments, improve infrastructure reliability, troubleshoot complex issues, optimize application performance, and keep web services running smoothly. My background allows me to work across the entire stack - from application code and web servers to containers, cloud infrastructure, and production systems. Core Technologies. Linux, Docker, Kubernetes, Terraform, Ansible, Git, GitHub, GitLab, CI/CD, Bash, Python, Nginx, PostgreSQL, MySQL, Prometheus, Grafana, Alertmanager, ELK, Elasticsearch, Kibana, Logstash, Cloud Infrastructure, Infrastructure as Code (IaC), Monitoring, Logging, Deployment Automation, Performance Optimization, Web Infrastructure, Production Support, Incident Response, Troubleshooting.

I am an IT Consultant and software engineer, specializing in blockchain and Linux Administration. I have worked on a range of projects, particularly pertaining to back-end development, cyber-security, arbitrage crypto trading, pen-testing, data analysis, API integration, web scraping open source intelligence gathering, and more. My primary programming languages are Python3 and the Bash shell. I specialize in blockchain technologies. I have been administering multiple crypto mining operations on the Proton & Metal blockchain for almost five years now. I am experienced with the EOS stack (Telos, Wax, Proton, etc), including deployment of Hyperion, as well as all things related to the Ethereum Virtual Machine. My IT career began in 2014 as an IT Consultant for the city of Fitchburg, Massachusetts. Originally I offered to volunteer my time to better the community, with the theory that if you are good at something, eventually someone will pay you to do it. As it turns out, I was correct, and it wasn't long before I was offered a job. My first task was installing Linux Ubuntu on several hundred computers that were donated to the city by the Federal Reserve Bank of Boston. Obviously the disks were wiped before we got the computers, so there was no operating system. I saw this as a perfect opportunity to help my community transition away from proprietary software, embracing open source systems instead. During 2016-2017, I co-founded a server hosting company. As a client of several different hosting providers myself, I felt that I could do better. This experience taught me much, including KVM and other virtualization technologies, sharpened my web design skills, and made me a better businessman. Late 2017 through early 2019 I worked on a confidential project relating to cryptographic currency trading and automation. This job changed my life forever; the experience was a catalyst to success and financial freedom. My role was diverse; I was both the project manager, one of the developers, and the architect for the system that we built. Today I am a self employed contractor, working as a software engineer, system administrator, and consultant. I specialize in security and blockchain, and I have written countless security tools and several automated trade platforms. More recently I have began to specialize in administering various blockchain/cryptocurrency technologies -- for example, recently I began working as an engineer/sysadmin deploying a block producing node on a proof of stake network. And most recently, I am doing a lot of web3 related projects. I have extensive experience operating nodes on the following blockchain networks:: - Bitcoin + forks - Ethereum + forks - Monero - Zcash + Lightwalletd - Eos +forks - Avalanche +forks - and more.

Server down, hacked, locked out, slow, or not working right? I’ll find the cause and fix it. I troubleshoot, administer, recover, and secure Linux and Windows servers. I also work with AWS/VPS environments, WordPress, web servers, DNS, SSL, SSH/RDP, email systems, Docker, and compromised infrastructure. I bring 20+ years of hands-on IT experience, including supporting hundreds of production Linux servers and working across Windows environments, web infrastructure, automation, and enterprise security. I don't just apply temporary fixes. I investigate the root cause, restore service safely, verify the result, and help reduce the chance of the same problem happening again. Small one-time troubleshooting jobs are welcome. I CAN HELP WITH: • Linux server administration: Ubuntu, RHEL, AlmaLinux, CentOS • Windows Server administration and troubleshooting • SSH/RDP access, authentication, users, sudo, permissions, firewall, and ports • CPU, memory, disk, filesystem, storage, LVM, and performance problems • Failed services, processes, systemd, cron, logs, and application errors • Server patching, backup, recovery, monitoring, and hardening • Compromised servers, malware, unauthorized access, and incident investigation • AWS EC2, Lightsail, and VPS setup, migration, recovery, and troubleshooting • Apache, Nginx, IIS, cPanel, WHM, PHP, and MySQL/MariaDB • WordPress repair, migration, malware cleanup, and hacked-site recovery • DNS, Cloudflare, SSL/TLS, HTTPS, AutoSSL, and Let's Encrypt • SMTP, email delivery, SPF, DKIM, DMARC, and mail server troubleshooting • 403, 404, 500, 502, 503, redirects, and connectivity errors • Docker, Docker Compose, application hosting, and service troubleshooting • Python and Bash scripting, automation, monitoring, and log analysis LINUX & WINDOWS SERVER TROUBLESHOOTING A reboot may bring a server back. It doesn't explain why it failed. I investigate logs, processes, services, CPU and memory usage, storage, filesystems, network connectivity, ports, permissions, authentication, scheduled jobs, application errors, and recent changes to determine what actually happened. If SSH stopped working, RDP is inaccessible, a service won't start, disk space disappeared, CPU usage suddenly increased, permissions broke, or an application went offline, I work from the evidence before making changes. SECURITY & COMPROMISED SERVER RECOVERY If a Linux or Windows server, VPS, or website may be compromised, I investigate suspicious processes and files, user accounts, login activity, SSH activity, scheduled tasks, services, permissions, web logs, persistence mechanisms, and other indicators of compromise. After recovery, I can help reduce repeat incidents through patching, SSH hardening, firewall rules, account cleanup, permission review, exposed-service reduction, and practical server hardening. WORDPRESS & WEB SERVER RECOVERY WordPress hacked, redirecting, slow, showing errors, or completely offline? I troubleshoot beyond WordPress itself when necessary. That can include plugins, files, permissions, malware, PHP, MySQL/MariaDB, Apache/Nginx, SSL certificates, DNS, logs, redirects, hosting configuration, and underlying server resources. AWS, VPS, DNS, SSL & EMAIL I troubleshoot AWS EC2/Lightsail, VPS hosting, DNS, Cloudflare, SSL/TLS certificates, HTTPS, SMTP, and mail-server problems. This includes broken DNS, expired certificates, Let's Encrypt/AutoSSL failures, SPF/DKIM/DMARC configuration, email delivery problems, redirects, firewall/connectivity issues, and server migrations. PYTHON & BASH AUTOMATION I build practical Python and Bash automation for server health checks, monitoring, log collection and parsing, reporting, storage cleanup, scheduled tasks, security checks, and repetitive infrastructure work. HOW I WORK My background combines system administration, troubleshooting, automation, and information security. I have hands-on experience with RHEL, Ubuntu, Windows Server, Python, Bash, Apache, Nginx, IIS, AWS, VMware, Docker, DNS, SIEM, DLP, CrowdStrike, production infrastructure, and enterprise security environments. My troubleshooting process is straightforward: Understand the symptoms Gather evidence Identify the root cause Make the safest appropriate fix Test and verify the result Explain what happened and what should be done next Have a Linux or Windows server problem and aren't sure what's causing it? Send me the symptoms or error message. I’ll take a look at what may be going wrong and explain how I would approach it.

I help businesses and homelab enthusiasts deploy secure, reliable environments using Docker, reverse proxies, VPNs, and automation. My experience includes designing and securing self-hosted infrastructure, troubleshooting servers, automating deployments with Bash/Python, and implementing security best practices inspired by real-world security experience. I can help with: • Docker & Docker Compose deployments • Traefik / NGINX reverse proxies • WireGuard VPN setup • Linux server administration • Security hardening • Bash automation • Infrastructure troubleshooting • Self-hosted applications • And More (I can always learn) I believe good infrastructure should be secure, documented, and easy to maintain—not held together with quick fixes. If you're looking for someone who communicates clearly and treats your infrastructure like it's their own, I'd be happy to help.