Muhammad Y.

LINUX SYSTEM ADMINISTRATOR | DOCKER | ZABBIX | WAZUH | OTRS | GLPI | Jump Server | Grafana | Snipe-IT | MySQL | MariaDB | CMDB | Open-Source Tools Experienced Linux System Administrator / Linux Server Engineer specializing in Linux server administration, system troubleshooting, infrastructure monitoring, cybersecurity, DevOps, Docker, networking, databases and open-source technologies. I help businesses deploy, configure, secure, monitor, troubleshoot, migrate and maintain reliable IT infrastructure and production servers. 🐧 LINUX SYSTEM ADMINISTRATION • Ubuntu, Debian, RHEL, CentOS, Rocky Linux, AlmaLinux • Linux server installation, configuration and migration • SSH, users/groups, permissions, sudo, systemd • Package/repository management, services and processes • Bash scripting and automation • Disk, filesystem, LVM and storage management • Server hardening and security • Log analysis and troubleshooting • Performance optimization • Backup, recovery, High Availability (HA) and Disaster Recovery (DR) 🐳 DOCKER & DEVOPS • Docker & Docker Compose • Container deployment and troubleshooting • Docker networking, volumes and images • Kubernetes & Helm • Ansible automation • Jenkins & CI/CD • Git & GitHub • Bash/Python automation • Deployment and infrastructure automation 📊 MONITORING & OBSERVABILITY Strong hands-on experience with open-source monitoring platforms. Zabbix: Server/Agent/Proxy deployment, templates, items, triggers, discovery, auto-registration, dashboards, alerting, notifications, SLA monitoring, Linux/Windows/server/network/database monitoring and troubleshooting. Grafana: Dashboards, visualization, Zabbix integration, infrastructure monitoring and alerting. Also experienced with Prometheus, Node Exporter, Elasticsearch, OpenSearch and Kibana. 🔐 CYBERSECURITY & SIEM Experience deploying and managing Wazuh SIEM and open-source security solutions: • Wazuh Manager, Agent, Indexer & Dashboard • Security monitoring and log analysis • File Integrity Monitoring (FIM) • Vulnerability detection • Custom Wazuh rules and decoders • Syslog and Windows/Linux event monitoring • Security alerts and active response • IDS/IPS and SIEM • Elasticsearch/OpenSearch • Security Onion and Elastic SIEM • SSH/server hardening • Firewall and VPN security 🌐 WEB, NETWORK & SERVER INFRASTRUCTURE • Nginx & Apache • Reverse proxy and SSL/TLS • DNS, DHCP, TCP/IP, VLAN, NAT and routing • Cisco, MikroTik and FortiGate • OpenVPN, WireGuard and Squid • FTP/SFTP, SMTP and web services • cPanel / WHM • Network and connectivity troubleshooting 🗄️ DATABASE ADMINISTRATION Linux-based installation, configuration, monitoring and troubleshooting of MySQL, MariaDB, PostgreSQL and MongoDB, including users/permissions, backup/restore, replication, performance monitoring and database connectivity. ☁️ CLOUD & VIRTUALIZATION Experience with AWS, Microsoft Azure, Google Cloud, Hetzner, VMware and Proxmox VE, including Linux cloud servers, VM deployment, migration, networking, backup and infrastructure management. 🛠️ WHAT I CAN HELP WITH ✔ Linux server administration & troubleshooting ✔ Linux server deployment, migration & hardening ✔ Zabbix installation, monitoring & alerting ✔ Wazuh SIEM deployment, rules & decoders ✔ Grafana dashboards & monitoring ✔ Docker / Docker Compose deployment ✔ Kubernetes & DevOps troubleshooting ✔ Nginx / Apache configuration ✔ MySQL / MariaDB / PostgreSQL administration ✔ Network, DNS, VPN & firewall troubleshooting ✔ Server performance optimization ✔ Backup, HA & disaster recovery ✔ Log management & security monitoring ✔ Cloud & virtualization administration ✔ Bash / Python / Ansible automation ✔ Open-source infrastructure solutions ⚙️ ADDITIONAL PRODUCTION EXPERIENCE • LAMP / LEMP stack deployment • HAProxy & Keepalived • Reverse proxy and load balancing • GitLab and deployment workflows • Redis and application services • Linux service monitoring • Production incident troubleshooting • Server resource and performance analysis • Infrastructure maintenance and technical support I focus on root-cause troubleshooting, security, reliability, monitoring and maintainable infrastructure rather than temporary fixes. If you need a Linux System Administrator, Linux Server Engineer, DevOps Engineer, Infrastructure Engineer, Zabbix Expert, Wazuh Expert, Docker Administrator or Server Troubleshooting Specialist, I can help you build, manage and secure your environment.