Mukesh Kumar Sahu

About Mukesh Kumar Sahu

I am a Red Hat Certified System Administrator and Engineer (RHCSA & RHCE) with over 8…

Experience

1. Senior Specialist

   HCLTech

   Aug 2023 — Present · Noida, IN

   As a Senior Linux System Administrator, I play a key role in ensuring the stability, security, and performance of enterprise-level Red Hat systems. I manage day-to-day operations in a 24/7 production environment and drive infrastructure optimization initiatives across virtual and physical servers.Key Responsibilities: Server Lifecycle Management: Provisioning and decommissioning physical/virtual servers; performing OS in-place upgrades across production, development, and test environments. Patch & Compliance Management: Conduct patching on VMs and physical machines using BigFix; implement server hardening best practices. Package & Tool Deployment: Install and configure packages like Qualys, SolarWinds, Defender, and custom tools via YUM and RPM. Monitoring & Incident Handling: Monitor server health and performance; resolve P1/P2 incidents and escalate vendor cases (Dell, Red Hat) when required.🧠 Change & CAB Coordination: Raise and manage normal, standard, and emergency change requests using ServiceNow; coordinate with CAB teams for approvals. Virtualization: Work with VMware ESXi environments for snapshot management, cloning, and VM configuration. Storage & File Systems: Perform filesystem creation, extension (ext4, XFS), LVM setup and resizing, and ACL/permission audits.‍ User & Access Management: Manage user accounts, sudo privileges, and special permissions. Disaster Recovery & Maintenance: Actively participate in DR drills; perform system reboots, backups, and core/memory augmentation activities.Tools & Technologies Used:Red Hat (RHEL 6/7/8), VMware ESXi, BigFix, ServiceNow, SolarWinds, Qualys, mdatp, Shell scripting