Mail Id: email@example.com
More than 9 years of professional IT experience with expertise in UNIX systems administration across various domains including telecom, retail, manufacturing, and insurance.
Proficient in server support, server management, patch and package management, user account management, NIS site management, Puppet management, auto mount and job scheduling and File System Management, troubleshooting server down issues, server builds, and performance tuning.
Experience with various UNIX systems including building of servers, migration, production support, data center support, packaging, automation, troubleshooting and security hardening of servers.
Experienced in configuring and administrating NFS, NIS and FTP with very good understanding of networking protocols such as TCP/IP, DNS.
Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX environments using shell scripting and CRON.
Experience in Installing Firmware Upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.
Experience in configuring and maintaining NAS and SAN storage.
Managed Patches, Upgrades and Licensed Products for System software on all flavors of UNIX and Linux Servers.
Supported Disk Volume Management – creating volume and Logical Volume Manager.
24X7 on-call production support and troubleshooting problems related to RHEL and SUSE Linux.
Experience in Troubleshooting issues related to upgrades of VCenter and ESXi and vSphere update manager.
Hardware: HP ProLiant DL, Dell PowerEdge, Intel X64 based servers, HP Blade Servers.
Server Monitoring Tools: Remedy, Service Now & SM9.
Storage Devices: RAID Manager, NAS, SAN.
Volume Management: Red Hat LVM, Veritas Volume Manager.
Operating Systems: Red Hat Linux 5, 6, 7 & HPUX
Programming Languages: Shell Scripting.
Working with Tata Consultancy Services Ltd from Dec 2011 – Present (7 Years)
Worked with Info Apps Technologies Pvt Ltd for 3+ Years.
Client: Walgreens Co., Chicago, IL Oct 2018 – Till date
Role: Linux/Unix Engineer
Worked on server builds in multiple environments such as Test, Dev & Prod.
Creating and managing Virtual Machines and Templates on VMware.
Installation of RHEL (Red Hat Enterprise Linux) 6.X & 7.X administrator and server maintenance.
Using and configuring Red Hat Satellite server, yum repositories and Troubleshooting activities.
Oversee Linux systems, using Red Hat satellite for configuration management and enforcement, as well as to ensure systems are updated and current.
Red Had Satellite Server for patching and kick start-based server deployment
Diagnosing, troubleshooting, and resolving performance issues along with other application, network and system.
Participates in disaster recovery planning, implementation and testing.
Pro-actively ensure stability, response time and life cycle over the network
Provide reports on activity, quality and performance of data network.
Apply OS patches and upgrades on a regular basis
Maintain operational documentation. Reviewing system and application logs for troubleshooting. Managed Disks and File systems using LVM on Linux, kernel patching.
Applied patches on all Linux Boxes from common repository using YUM.
Managing User Accounts and Groups, managing Disks and File Systems.
Developing BASH, shell scripts to automate cron jobs and system maintenance.
Installation/Upgrade of packages and check package dependencies of Linux Servers using RPM.
Installed, removed and updated packages/group packages with yum. Systems administration, maintenance, and monitoring various day-to-day operations. Creating and maintaining user accounts, profiles, and security rights.
Client: CNA Insurance, Chicago, IL April 2017 – Sep 2018
Role: Linux/Unix Engineer
Responsible for establishing the REAR Backup technology for Linux which avoids Single Point Of Failure in case of OS Corruption
Responsible for finalizing the standard OS configurations and pushing the settings/configurations from Puppet Master to all the client servers in the environment.
Responsible for Up to date Patching and remediating Vulnerabilities
Worked on server down issues – recovering a physical server from corrupted OS
Responsible for setting up Asset Health Compliance(AHC) report and remediating failed AHC Controls
Performance analysis and Performance tuning on the required servers
Identify project risks, update risk register and mitigate risks
Involved in DC Movement planning and execution.
System Administration (Linux, AIX & HP-UX), DC Operations, Virtualization ( VMware ) and Datacenter consolidation
Version upgrades and cross platform migrations.
Implemented DR solutions for various application platforms successfully recovered critical applications in the DR environment in DR exercise
Patch and Channel management using Redhat Satellite server
Manage IT infrastructure & handle client escalations
Vendor co-ordination for H/W & S/W Procurement
Define Change management process as per ITIL (Information Technology Information Library) guidelines and assess the change and approve / disapprove the changes and communicate to stake holders with reasons.
Client: Agilent Technologies, Hyderabad, India Dec 2011 – Mar 2017
Role: Linux/Unix Engineer
·Installation and configuration of Linux OS on physical servers and VMware Environment
·Patch and Channel management using Redhat Satellite server
·Built and setup NIS site in Santaclara site.
·Managing and troubleshooting NIS server and client issues and user accounts globally through various NIS sites
·Managing and troubleshooting automounts.
·Filesystem and LVM Management
·Troubleshooting deep level filesystem issues by fixing journal issues and by resizing the journal size and fixing LVM issues like missing PV, missing LV etc
·Installation and configuration of Redhat Cluster
·Troubleshooting services startup/failover issues in Redhat Cluster Suite
·Configuring and fine tuning Resource groups in Redhat Cluster suite services
·Troubleshooting and fixing iSCSI servers in UCS environment
·Troubleshooting multipathing issues in servers and enabling/disabling multipathing
·Troubleshooting and fixing GRUB issues by re-building GRUB during VM servers migrations
·Troubleshooting and fixing end user's issues like Samba, FTP, rsync etc., by proactively taking desktop sharing session.
·Troubleshooting and fixing performance issues like high IO, slow performance of servers by fine-tuning system parameters, migrating luns from one filer to another filer etc .
·Network File Systems configuration
·Performance analysis and system tuning
·Installation of HP OV Operation Manager in Linux Cluster environment.
·Preparing RCA’s and process Improvement documents
·Configuration and maintenance of HP OV Operations
·Manage IT infrastructure & handle client escalations.
·Regular meetings with the client for IS/IT issues and close them in-time.
·Vendor co-ordination for H/W & S/W Procurement
·Creating process documents for change and incident management activities
·Responsible for maintaining stable configurations and operations of multiple local Linux, HP-UX,AIX based advanced applications
·Coordinating with technical team for build and test activities
·Patching AIX servers, extending AIX filesystems, services restarting etc.
Client: Britannia, Hyderabad, India Apr 2008 - Dec 2011
Role: Linux/Unix Engineer
·RHEL Logical Volume Manager (LVM),
·RHEL Startup and shutdown
·Basic Network administration TCP/IP
·Automating Jobs using Cron& AT
·Installing RHEL & Upgradation of latest patches as per requirement.
·Configuration of Network File System (NFS Service) and Auto mount.
·User & group administration
·File systems backup and restore.
·Squid Proxy Server
·Yum configuration and rpm management.
·Network configuration of DNS, Samba server, Apache Server, Send mail and Postfix server.
·Dovecot and Squirrel Mail Web Mail setup.
·Implementation and troubleshooting of network services like SSH, FTP and SAMBA
·Installed and configured RAID level Servers.
·Maintaining the LAN networks
·Installed and configured all Network Printer (TCP/IP)
B. Tech Mechanical Engineering – Acharya Nagarjuna University (Guntur, India) - 2007.