Nidhi Mishra

Role: Linux Administrator

• Managed and maintained 3000+ Linux servers (RHEL, SUSE, OEL) across production environments.
• Installed and configured Red Hat Linux on virtual platforms; conducted manual builds using vCenter.
• Performed Linux server builds, decommissions, and OS migrations (RHEL, Linux ,SUSE, OEL).
• Resolved L2/L3 level issues including user login failures, permission errors, and system performance issues.
• Handled user ticketing for account creation, password resets, and access-related problems.
• Created and managed files/directories at user and root levels with appropriate permissions.
• Executed patch management using yum, dnf, and rpm; ensured monthly patch compliance.
• Administered user and group management: add/delete users, modify user parameters, manage groups.
• Recovered root passwords, implemented password aging and security policies.
• Identified CPU/memory bottlenecks; optimized performance.
• Rebooted servers and applications to maintain uptime and system stability.
• Collaborated with Oracle DB, Middleware, and VM teams to support cross-platform integration.
• Managed file and directory permissions, including ACLs and access audits.
• Performed root cause analysis (RCA) for PRB tickets, followed up with vendors for resolution.
• Handled file system management, OS upgrades, and LVM partitioning.
• Worked on Storage Reclamation and executed Recovery & Sustenance Plans.
• Monitored system performance using command-line tools and zabbix monitoring tool.
• Ensured patching pre-checks and compliance for all Linux servers on a monthly basis.
• Focused on incident reduction strategies and improved system reliability.
• Provided support for customer services and worked on two Statements of Work (SOWs) for new server builds.
• Delivered support to meet enterprise SLAs and ensure seamless Linux infrastructure operations.