Fargo, ND | Expert Linux Administration & Support 🐧

🚀 Distributions I Support

I possess deep architectural knowledge across the entire Linux ecosystem:

• Enterprise: Red Hat Enterprise Linux (RHEL), Rocky Linux, AlmaLinux, Oracle Linux.

• Debian-Based: Ubuntu (Server & Desktop), Debian, Linux Mint.

• Community & Specialized: CentOS (Stream), Fedora, Arch Linux, Gentoo, openSUSE/SUSE Enterprise.

• Cloud-Native: Amazon Linux 2023, Alpine Linux.

Service Specializations

🔐 System Setup & OS Hardening

I don't just install Linux; I secure it. I provide:

• Custom OS installation, partitioning, and kernel upgrades.

• Secure Baseline Configuration: Hardening the OS using CIS benchmarks.

• Access Control: Advanced SSH configuration and granular sudo policies.

📈 Performance Monitoring & Troubleshooting

I eliminate bottlenecks before they impact your users:

• Real-time monitoring of CPU, RAM, and Disk I/O.

• Root Cause Analysis (RCA): Deep log inspection using journalctl and dmesg.

• Capacity planning to ensure your hardware scales with your traffic.

🛡️ Security, Compliance & Firewalls

I protect your data from evolving threats:

• Vulnerability remediation and automated security patching.

• Firewall management via iptables, nftables, and UFW.

• Mandatory Access Control implementation using SELinux or AppArmor.

💾 Backup, Recovery & High Availability

I ensure your "Plan B" actually works:

• Disaster Recovery (DR) strategy and automated backup validation.

• High Availability (HA) clustering and failover support.

• Data integrity testing and point-in-time recovery.

🤖 Automation & Infrastructure as Code (IaC)

I replace manual toil with elegant code:

• Ansible: Configuration management at scale.

• Terraform: Provisioning cloud and on-prem resources.

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

🧑‍💻 The Expert’s Toolkit

To resolve complex issues, I utilize the industry-standard "Swiss Army Knife" of Linux tools:

• Performance: htop, iotop, sar, vmstat, glances.

• Networking: tcpdump, wireshark (tshark), netstat, dig, nmap.

• Storage: LVM, ZFS, df, du, smartctl.

• Security: Lynis, Fail2Ban, OpenSCAP.

📖 Unique Guide: Master Your Distribution

⚙️ Essential Commands Across Families

🔧 Fixing Common Issues

1. Full Disk Panic: Use du -sh /* | sort -h to find the culprit. Often it’s /var/log. Clear old logs with journalctl --vacuum-time=7d.

2. SSH Connection Refused: Check if the service is running (systemctl status sshd) and verify the port isn't blocked by the local firewall (ufw status or firewall-cmd --list-all).

3. High Load Average: Run top and press Shift + P to sort by CPU or Shift + M for memory. Look for "zombie" processes or I/O wait (wa) issues.

💡 Tips for a Successful Server Setup

• Minimalism is Security: Only install the packages you absolutely need. Every extra binary is a potential security hole.

• Use SSH Keys: Disable password authentication immediately. It stops 99% of brute-force attacks.

• Documentation is King: Maintain an operational runbook. I can help you create these so your team is never in the dark.

• Standardize Builds: Use configuration management (Ansible) so that your fifth server is configured exactly like your first.