Comprehensive Service Portfolio

I offer a wide range of specialized Linux/Unix services designed to keep your operations seamless:

• ⚙️ System Setup & Management: Installation, configuration, OS hardening, patch management, and user access control (SSH/Sudo).

• 📊 Monitoring & Troubleshooting: Deep-dive analysis of CPU, memory, and disk I/O. I perform proactive root cause analysis to prevent downtime.

• 🛡️ Security & Compliance: Firewall configuration (iptables/UFW), SELinux/AppArmor tuning, and vulnerability remediation.

• 💾 Backup & Disaster Recovery: Designing robust backup strategies and high-availability (HA) failover systems.

• 🤖 Automation & DevOps: Infrastructure as Code (Terraform), containerization (Docker/Kubernetes), and Ansible configuration management.

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

🐧 Supported Distributions

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

👨‍💻 The Expert's Toolkit

To resolve complex issues, I utilize the industry’s most powerful diagnostic tools:

1. Performance:htop, iotop, sar, and glances for real-time resource tracking.

2. Networking:tcpdump, netstat, nmap, and dig for connectivity troubleshooting.

3. Logs:journalctl, tail -f, and ELK Stack for centralized logging.

4. Trace:strace and lsof to find exactly what a process is doing (or failing to do).

🚀  Getting Started & Fixing Issues

1. Essential Commands Across Distributions

While most commands are universal, package management differs. Here is how I handle them:

• Ubuntu/Debian:sudo apt update && sudo apt upgrade

• RHEL/CentOS/Rocky:sudo dnf check-update && sudo dnf upgrade

• Arch Linux:sudo pacman -Syu

The "Golden" Troubleshooting Command:

# Check for failed services across any systemd-based distro
systemctl --failed

2. Fixing Common "Disk Full" Issues

If your server stops responding, it’s often a filled partition. I use this workflow:

1. Find the culprit: du -ah / | sort -rh | head -n 20

2. Clear logs: journalctl --vacuum-time=3d

3. Check for deleted but open files: lsof +L1

💡 Tips for a Successful Server Setup

• Principle of Least Privilege: Never log in as root directly. Use SSH keys and sudo.

• Document Everything: I maintain operational runbooks so you aren't left in the dark.

• Automate the Baseline: Use Ansible to ensure every new server has the same security patches and user configs from minute one.

• Separate Partitions: Always put /var/log and /home on separate partitions to prevent system crashes if logs or user data overflow.