Alexander Dimitrov

Providing maintenance and sustainability of leading Linux distributions such as Debian, Ubuntu, CentOS, CloudLinux , etc and Windows servers. Configuration and support of mail solutions such as Postfix, Dovecot. Diagnosis of network related problems and scenarios (tcpdump, iptables,etc) Configuration of DNS services. SSL certification configuration. Troubleshooting issues and inconsistencies related to MySQL and MariaDB systems. Support of the Plesk stack

OS: Administration of Linux based servers (Debian,Ubuntu,CentOS) Administration of Windows based servers (2008 - 2016) Configuring, diagnostics, debugging and repairing: Mail service - Postfix, Dovecot Maintenance of storage systems with software/hardware RAID Diagnosis rebuild of RAID arrays File systems - recovery and optimization Network devices, Network flow. Firewalls - Zone Alarm, Iptables. Web servers - Apache, Nginx Domains and DNS Proxmox IPMI(ILo)

Linux administration and support - Workstations – installation, maintenance, software - Servers - configuration, diagnostics - Storage - RAID, LVM - Virtualization - Web Servers Design and maintenance of network infrastructure - Security - Firewalls (iptables), VLANs, VPN - Distribution for embedded devices - Mikrotik, OpenWRT, pfSense - Wired and wireless network infrastructure - Diagnostics of network issues - nmap, wireshark

Administrations of Ubuntu client and server LTSP Backup system Administrating software RAID