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nsrathnayake

Nirosha R

@nsrathnayake

Linux Server Expert, VMware, Security, Apache, Nginx, WordPress, Moodle

Sri Lanka
Sinhala, English
About me
I am a Systems Engineer, certified as RHCSA (Red Hat Certified System Administrator), with 15+ years of experience in enterprise Linux distributions including CentOS, Red Hat, Debian, and Ubuntu including server management and troubleshooting. My expertise includes web server administration (Apache, Nginx), Content Mangement Systems (WordPress, Moodle LMS), VMware (ESXi, vCenter, vSphere, Workstation), Network & System Monitoring (Cacti, Nagios, Xabbix, LibreNMS, Icinga2), Wazuh security monitoring and DSpace repository management, delivering secure, optimized, and reliable server solutions.... Read more

Skills

n
nsrathnayake
Nirosha R
Offline • 

See my services

Server Administration
I will secure your linux server and patch php2shell vulnerabilities
From$40 / projectMore details
WordPress
I will install wordpress, customize and secure your website
From$80 / projectMore details

Portfolio

Work experience

University_of Colombo

University of Colombo

Full-time • 19 yrs 5 mos

Systems Engineer

Oct 2021 - Present • 5 yrs

Linux Systems | VMware | Proxmox | ELK | Eduroam As a Systems Engineer, I manage enterprise-grade Linux infrastructure, private cloud environments, and identity management systems. My expertise includes VMware and Proxmox virtualization, Linux server deployment and administration, centralized logging with the ELK stack, and secure network authentication. I help organizations build reliable, secure, and scalable IT environments while providing advanced troubleshooting and infrastructure support. Skills: ☢ Linux Server Administration ☢ VMware vSphere & Proxmox ☢ ELK Stack (Elasticsearch, Logstash, Kibana) ☢ Eduroam Deployment & Support ☢ Server/ System/ Infrastructure Monitoring & Troubleshooting

Web Administrator / Technical Officer

Oct 2013 - Oct 2021 • 8 yrs

Web Systems | LMS | Microsoft 365 | Azure | Google Workspace Managed and maintained enterprise web platforms, online learning systems, and cloud collaboration services for one of Sri Lanka's leading universities. Led server deployments, LMS administration, Microsoft 365 and Google Workspace management, and coordinated cloud adoption initiatives using Microsoft Azure. Experienced in supporting large-scale environments serving staff, students, and institutional stakeholders. Skills: ☢ Server/ System/ Infrastructure Monitoring & Troubleshooting ☢ Moodle & LMS Administration ☢ Microsoft 365 Administration ☢ Google Workspace Administration ☢ Azure Cloud Services ☢ Linux Web Servers ☢ Website Administration ☢ IT Service Management

Technical Officer

Apr 2009 - Sep 2015 • 6 yrs 5 mos

Server Administration | Networking | Technical Support Provided technical support, system administration, and IT infrastructure services within the academic environment. Assisted with server maintenance, network operations, hardware support, and user services while contributing to the smooth operation of institutional IT systems. Skills: ☢ Technical Support ☢ Network Administration ☢ Hardware & Software Troubleshooting ☢ Linux Administration ☢ System Maintenance