Sai Nitin

• Installed, configured, and maintained services such as DNS, DHCP, NFS, Apache Web Server, Samba, SSH, RPM and YUM Repository.
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers.
• Worked with DBA's, Networking Team, and Developers to resolve their daily issues.
• Performed standard system administration tasks such as troubleshooting and problem resolution, patching, installing packages using rpm and yum, drivers, software and hardware upgrades.
• Used Puppet tool for managing system configurations, creating and push profiles to new servers.
• Performed automated installations of Operating System using kickstart for Red Hat Enterprise Linux /6/7.
• Wrote shell scripts for various system tasks such as back-ups, collecting and sorting logs, installation and monitoring.
• Configured iptables firewall and hardening Linux systems for system security.
• Managed disks and file systems using LVM.
• Administered Nagios monitoring tools for servers monitoring and incident alerts.
• Monitored performance of servers using tools such as sar, top, free, vmstat, iostat, traceroute, etc.
• Monitored and maintained disk space and backup systems, and implemented change controls, capacity planning and growth projections on systems.
• Performed troubleshooting existing user accounts, security objects and authorizations to resolve security conflicts by creating sudo rules, supporting users, setting up new accounts and password resets.
• Involved in daily incident management and resolved day to day problems raised by users and incidents which are logged by Event monitoring system.

• Performed standard system administration tasks, Installation of OS using kickstart from Standard build, patching, software installation and hardware upgrades, troubleshooting and problem resolution.
• Setup and maintained Nagios monitoring for monitoring servers and application.
• Setup yum repository in server, upgraded repository by appropriate patching and installing software packages and services using yum and rpm as required.
• Setup and maintained domain name system servers.
• Performed day to day Linux administration tasks such as user account management, directory services, file system sharing and permissions.
• Utilized logical volume manager and swap to create, modify, delete file systems.
• Optimized system and application performance using techniques like shutdown, reboot, start and stop services and tools to identify performance issues and solutions.
• Edited system configuration files: network settings, kernel parameters, service configuration files, cron.
• Loaded and unloaded modules as requirement in Kernel and made them persistent to boot by making appropriate changes.

• Providing Datacentre Support for our servers in the client location which includes Server setup in DC, OS Installations, deploying applications and configuring the software.
• Experience in server rack setup of HP Proliant G series servers.
• Experience in Cabling and network support required for the servers in DC.
• Handling Tickets directly from customer, based on the priority and resolving within SLA.
• Troubleshooting Issues related to Apache Tomcat services.
• Troubleshooting Issues related to MySQL connectivity Issues and performing DBA tasks which includes but not limited to DB optimization, Performance tuning, etc.
• Automation of several tasks which includes Alarm Point Alerts, TPS Counts, Backup scheduling.
• Providing Datacentre Support for our servers which includes Server setup in DC, OS Installations, Deploying applications.