VISHNUKUMAR AYYASAMY

Detail-oriented Linux System Administrator and Senior Systems Engineer with extensive experience in managing and troubleshooting operating systems, web servers, and application servers on the Linux platform. Recognized for a process-oriented approach and strong organizational skills, complemented by effective communication abilities. Seeking a challenging opportunity within a forward-thinking organization that values skill utilization and knowledge enhancement in the IT sector. Proven leadership as a Team Lead, successfully guiding teams to meet client requirements while holding a Master’s degree in Cyber Forensics and Information Technology.

• IT experience in Linux System Administration in Redhat Linux, CentOS, Ubuntu, SUSE Linux environments.
• Installed packages with RPM, YUM and DEB based distributions.
• Installation of Patches and Security/VAPT fixes on Linux servers.
• Worked on periodic patching for Various Linux OS flavors. Upgraded kernel OS patching of Linux.
• Assigning Repositories and attaching cycle to patch from satellite server and Ansible script.
• Installing, configuring and administering on Linux machines Worked and resolved multiple Vulnerabilities affecting the system performance.
• Management of Red Hat Linux user accounts, groups, directories, file permissions.
• Experience in working with ITIL based delivery model.
• Prepared SOP’s based on working tasks Disk management using fdisk and LVM. File System extension on Linux servers and configuring multipath disks.
• Good knowledge in OS Installation and Disk Management.
• Good knowledge in LVM and SWAP Configuring records in DNS.
• Performance monitoring like Memory, Swap, CPU and Disk.
• Increased CPU, Memory and file system for Linux servers Automated the process and day to day activity using Ansible.
• Scheduling a CRON Jobs for automation.
• Responsible for diagnosing and troubleshooting, Redhat, Suse, CentOS and Ubuntu Worked on OS upgrade in RPM and DEB based distributions.
• Hands on experience in Installation and configuration NFS, DNS, Samba & FTP in Linux. Responsible for handling the performance issues of applications server in production environment.
• Maintaining logs using log rotate. Attended Pre-Cab and Cab meetings on behalf of offshore team to present our weekly/monthly changes Good hands on exposure on DR activity and migration, worked on failback and failover activities multiple times.
• Experience in Identity Management and work on Account Provisioning, Deprovisioning , reactivation, extension requests.
• Good knowledge and understanding in Azure System Administrator. Hands on experience on Azure Cloud.
• Good Knowledge on EC2 Instance Creations , Disk Expansions , Elastic IP, Snapshot and Restorations in AWS environment Having good knowledge on Customizing and Modifying the AMI as per the Business Requirements.
• Good knowledge and understanding in creating/Managing AMI/Snapshots/Volumes, Upgrade/downgrade AWS resources (CPU, Memory) Maintain system availability as per Service Level Agreements(SLA). Working based on ticketing tools like Service-now.
• Installing and configuring third party application as per need.
• Good Knowledge in Linux Administrator Commands VSFTP server configuration and setting up privileges Setting up File permission, Ownership and Advanced File Permission Monitoring log activity for troubleshoot the issues.
• Troubleshooting the server failures and crashes and carrying out failure recovery.

• Journal of Advanced Research in Dynamical and Control Systems" (ICCET - SCOPUS INDEX PUBLICATIONS - JARDCS)
• Author of Technical Paper : H-264 NOISE REMOVAL and successfully published in the "Journal of Advanced Research in Dynamical and Control Systems" (ICCET - SCOPUS INDEX PUBLICATIONS - JARDCS)

• Chairman of VEC Math Club at Velammal Engineering College, Chennai during 2015-2018
• Active IEEE Member