Linux System Administrator

Unifun

Chișinău

Systems Engineering

OpenVPN Management: Managed OpenVPN by updating user profiles, handling profile creation, and ensuring secure access for new and former employees.

Network Connectivity: Maintained reliable connectivity between office networks and servers (HTTP/SSH) via VPN and proxies. Troubleshot issues using tcpdump and traceroute.

Firewall Management: Updated iptables rules to reflect changes in production environments, ensuring security and optimizing firewall performance.

Safe Software Installation: Installed software on both new and legacy systems, using package managers or compiling. To avoid conflicts, safely compiled software in isolated directories, ensuring smooth coexistence with older versions like PHP 7.2 while introducing newer versions like PHP 8.2.

LAMP/LEMP Configuration: Configured and optimized Apache, Nginx, PHP-FPM, MySQL, and other services. Managed installations of Asterisk, RabbitMQ, KeyDB, and Prometheus exporters for system monitoring.

System Monitoring: Developed Python and Bash scripts to export server performance metrics to Grafana. Monitored Asterisk call issues and analyzed RTP streams.

System Troubleshooting: Resolved system issues, including restoring from GRUB. Managed system backups with Git, ensuring easy recovery.

Automation & Backups: Created Ansible scripts to automate database and directory backups. Maintained MySQL databases, creating users and optimizing tables.

Nagios/NRPE Monitoring: Configured Nagios/NRPE for system monitoring, ensuring proactive infrastructure health checks.

Linux Administration: Administered Linux systems (Ubuntu, CentOS) with strong troubleshooting skills, maintaining server stability across environments.


Skills and Tools:

Linux Administration (Ubuntu, CentOS)

OpenVPN, Iptables

LAMP/LEMP Stack (Apache, Nginx, PHP-FPM, MySQL)