Mallikarjuna B

Operating Systems:

• Expertise in Linux distributions (Red Hat, CentOS, Ubuntu) and Windows Server Administration.
• Virtualization with VMware, vSphere, and vCenter.

Cloud Platforms:

• Azure: VM deployment, resource scaling (RAM, CPU, Disk), cost optimization, AD domain joining, capacity monitoring, and security hardening.
• GCP: GKE cluster upgrades, VM resource scaling, snapshot management, capacity and performance monitoring.
• AWS: VM provisioning, resource scaling, capacity optimization, GKE cluster upgrades.

DevOps Tools:

• Proficient in Git, GitLab, Jenkins, Ansible, Terraform, Docker, and Kubernetes.
• Expertise in GKE upgrades (versions 1.26, 1.28, and 1.30), monitoring and maintaining Kubernetes clusters using tools like Prometheus and Grafana.

System Administration:

• Experience in user and group management, file system management (LVM), package/patch management (YUM, APT, WSUS), server performance tuning, and troubleshooting.
• Hardware management through remote consoles (IMM, ILO, iDRAC).
• Knowledge of ITIL processes: incident, problem, and change management.

Monitoring & Security:

• Tools: Zabbix, Nagios, Qualys, Rapid 7.
• Expertise in server monitoring, patch management, and vulnerability assessments using tools like Rapid7 and Qualys.

Other Tools:

• Experience with Active Directory, Nagios, OCS, and event log analyzers.

Familiar with disaster recovery, shell scripting, and databases (Oracle/MySQL).

• Managed Linux/Windows server environments for clients like Axis, HDFC, SBI.
• Performed Azure VM management, patching, security hardening, and resource optimization.
• Tools: Ansible, Zabbix, Nagios, Qualys.

• Handled Linux server management for clients like Optus, Robi, MoovBenin.
• Managed VM provisioning, monitoring, and troubleshooting on VMware, Azure, and Linux.

• Providing good value services to the customer through L1 and L2 level 24x7 supports on a shift rotation basis for Linux Servers.

• Preparing Satellite for Patching activity by Publishing and promoting the packages for the environment.

• Checking pre-requisites for patching & updating patches on all the Linux Servers of the environment monthly.

• Patching of servers through SCCM, WSUS tools.

• Creating / extending / Upgrading swap partitions.

• Upgrading CSR and DRAC certificate for Physical Servers.

• Decommission the EOFL Server.

• Administer & manage a large base of Linux servers (both development & production environment) that host several critical business applications, and databases ethic for CTL.

• Troubleshooting server crash, file systems, booting problems, and providing Root Cause Analysis to application end.

• Performing the health check of the Servers quarterly and suggesting the appropriate changes.

• Troubleshooting and fine-tuning Server’s performances, Such as Issues with Swap Space, CPU Utilization, and Memory Utilization.

• Assuring system security with the utilities IP tables, TCP-Wrappers, and SE Linux

• Coordinating with vendors like REDHAT, and HP for resolving issues and hardware replacement.

• Handle the change management following ITIL standards for driving the completion of all scheduled changes. This includes liaison related activities with various teams, onsite coordinators & the vendors, especially in cases involving hardware related fixation/replacement of disk, memory & system board.

• Resolution of tickets related to the monitoring infrastructure, deploying new servers, decommissioning of retired servers, monitoring (Disk Space Utilization Checking, analyzing logs, rotating logs in case of space issues, CPU/Memory usage, and performing health check using Team quest tool).

• Interfacing with developers to resolve bugs / apply patches etc.

• Performing Disaster Recovery and flash activities. Strong Knowledge in Change Management