Professional Summary:

More than ** years of professional IT experience with expertise in UNIX systems administration across various domains including telecom, retail, manufacturing, and insurance.

Participate in architecture reviews and/or audits ; define and maintain documentation of infrastructure and technology standards, process and policies related to core infrastructure.

Identifying and Implementing best practices for technology architecture, Contribute to continuous Improvement initiatives to stabilize the Infrastructure .

Installing and configuring RHEL operating systems,AIX operating systems and P-series machines.

Good Knowledge on designing, prototyping and deploying HPC Clusters

Creating gold images in building Linux.

Experience in troubleshooting Linux OS, filesystems, cluster hardware

Maintained custom kickstart Yum repositories for automated and network based system and software installations on a fleet of Linux Based Servers and Clusters .

Configure yum repository, installation and administering of packages, patch, upgrades.

Developed Bash Scripts and Ansible Playbooks for monitoring system resources and patch management .

Working on SSH, VSFTP services on Linux servers as per the requirement

Package management using RPM and YUM. Installation of packages and checking the integrity of packages

Knowledge on architecting secure VPC solutions in AWS with the help of Network ACLs, security groups, public and private network configurations.

Experience in managing and maintaining IAM policies for organizations in AWS to define groups, create users, assign roles and define rules for role-based access to AWS resources

Knowledge on AWS solution architecture including S3 buckets, Route 53, EC2 instances, Database, cloudfront, VPC.

Maintaining highly reliable 24x7x365 Linux production servers for internal, global and AWS EC2 instances.

Experience in working with IBM storage, assigning and scanning LUNs from Linux servers, Configure multipath for storage devices

Managing user accounts, groups

Manage system routine backup, scheduling cron jobs, enabling system logging and network logging of servers for maintenance.

Create and maintain user accounts, profiles, security rights, disk space, and process monitoring.

Troubleshooting server booting related issues, working on rescue mode, working file system consistency, and fixing fstab issues.

Extensive experience in working with new server build, NIM, HACMP and VIO environments.

IBM Certified – AIX 6.1, 7.1

ITIL Certified

Successfully completed Many DR tests.

Lead P5 to P7 Migration project from front & migrated nearly 700 lpars from P5 to P7 within 6 months.

Migrated multiple systems from Legacy Hardware like P6, P7, P8 into new P9 architecture. Took care of project end to end including designing and system load management and cleanup of the old legacy hardware using the Retirement process.

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.

Part of Network Migration project [ Migrating 1Gig Network to 10Gig Network for IBM Fixcentral Servers]

Part of DS4000 to DS8000 offline migration coordinated with Storage support / Application Support.

PowerHA Cluster Migrations and Machine Firmware Updates.

HMC upgrade, HMC update, new HMC Build, Building Frame right from the scratch, configuring networks etc

Experience Summary:

Organization : Sai Global Solutions Inc

Duration : April 2019 – Till Date

Designation : Unix-Infra technical Specialist

Organization : Sonata Software Solutions Pvt ltd

Duration : August 2016 – April2019

Designation : Consultant

Organization : IBM India Pvt Limited

Duration : March 2012 – August 2016

Designation : Senior Operations Professional

Organization : BO-Tree Software Pvt ltd

Duration : January 2009 – April 2012

Designation : System Administrator

Technical Skills:

Operating System : IBM AIX - 5.3, 6.1, 7.1, 7.2, RHEL-5, 6, 7, Suse -11, 12

System Recovery : mksysb, savevg, restvg, restore, tar, cpio, TSM restorations

Cluster Technology : HACMP 5.3, 6.1, PowerHA-7.1

Virtualization : VIO, LPAR, DLPAR, HMC, VMWARE, Red Hat LVM, GPFS

Servers : NIM, NFS, FTP, SAMBA, DHCP

Networking : TCP/IP, DNS

Programming : Shell Scripting

Education:

B.Tech from JNT University – 2006.

Board of intermediate Education – 2002.

Career Profile:

Company: CTS (Cognizant Technology Solutions) April 2019 to Till Date

Designation: Unix-Infra technical Specialist

Good Knowledge of Linux, Installation of Linux in different modes

Server builds using ISO image and network installation using kick-start

New server builds, Creating Linux VMs in VMware environment

Configuring and managing NFS in Red hat Linux environment. Configure and troubleshoot NFS and auto FS mounts.

. Installing and configuring RHEL operating systems

Experience in building Linux servers

Configure yum repository, installation and administering of packages, patch, upgrades

Knowledge on AWS solution architecture including S3 buckets, Route 53, EC2 instances, Database, cloudfront, VPC.

Maintaining highly reliable 24x7x365 Linux production servers for internal, global and AWS EC2 instances

Remote Infrastructure Management with the ITIL standard processes like Incident Management, Problem Management, Change Management.

Linux LVM and File system management (Linear, Striping) and troubleshooting the issues.

Linux/AIX root password recovery.

Linux booting issues and troubleshooting the issues such as re-install GRUB on RHEL5,6 and RHEL 7 and multipath devices.

Booting the system into single user mode and rescue mode on RHEL 5,6,7 and 8.

Linux Patch management using Ansible scripts and troubleshooting the issues.

Generate reports on various servers using Ansible playbooks. Has the experience to handle YAML files.

SAN migration on Physical server by using standard RHEL installation from old storage to new storage.

FC backup configuration on Prod and troubleshooting the issues during hot and cold backups.

Handling VIO/Frame/hmc/OS upgrades

Handling HACMP related issues on HA 6.1 and PowerHA 7.1

Support AIX / Linux (RHEL-6, 7) OS to run various software applications like Apache, Samba, FTP and DHCP on Linux Servers

Configure redundant VIO servers, create ether channel, Shared Ethernet adapter

Performing SEA failover tests

Mapping disks to VIO clients. Configuring redundant paths to disks using MPIO.

Performing different operations on LPARs – assigning /removing/moving resources to partitions dynamically.

VIO server backup and recovery.

Hands on experience with Logical Volume Manager like creating Physical Volumes, Volume Groups, Logical Volumes, Filesystems, Disk Partitions using fdisk utility.

NFS/CIFS Administration, Exporting Filesystems, mounting exported Filesystems, Working on NFS Services and fixing any mounting issues.

Installing Linux (RHEL-6) on various machines by using kickstart and Installing packages using RPM and YUM

Working on AIX OS new installations, Migrations, TL Upgrades, SP Upgrades using standard procedure and NIM based on requirement and AIX OS Patches

Analyzing Software and Hardware environments to determine any system defects

Working on Kernal Upgrades on Linux and fixing Kernal Issues through Rescue Mode

Troubleshooting booting related issues, creating boot records, working with system maintenance mode, accessing rootvg in system maintenance mode, recovering root password, fixing booting related issues using NIM.

Generating server snapshot, SOS Report to analyze Software or Hardware issues as per PMR recommendations.

Configuring and Managing AIX/Linux (RHEL -6) Networking and basic troubleshooting.

Configuring HACMP networks, Failover testing and verification, Cluster Synchronization

Trouble shooting HACMP related issues, going through the log files, testing HACMP Heartbeat, Cluster synchronization, performing HACMP health checks, looking at cluster statistics

Working on Migrations (6.1 HACMP to PowerHA 7.1) and Upgradations in HACMP

Performing failover and fallback tests on HACMP Cluster nodes during Maintenance activities and verification

Working on HMC, Administrating, LPAR, DLPAR Nodes, Resource allocations, moving resources dynamically when required

Vmware – Build new VM’s and installing Linux OS as guest.

Manage VM's for new Disk Additions, VM Tools installation, Clone and Snapshots.

Working on Incidents to provide the solutions for client requests and during high severity outages.

Working on problems to provide Root Cause, high quality delivery to clients in response to specific requests.

Identifying and resolving system issues in a timely manner using alerting systems.

Took care of multiple Frame builds both AIX and Linux right from scratch including racking and stacking.

Responsible for maintaining stable environment. Auditing and monitoring AIX and Linux servers.

Setup and Completed multiple DR activities successfully.

Company: Sonata Software Solutions Pvt ltd August 2016 to April 2019

Designation: Consultant

Manage 1000+ servers

AIX L3 support for nearly 10 clients.

Provides overall support and maintenance of operating systems and network connectivity for all AIX systems.

Provides support to vendors and application programmers as necessary.

Maintains current operating systems, PTF levels, and patch versions that comply with vendor requirements.

Coordinates hardware repairs with appropriate vendors on supported platforms as necessary.

Performs research and development on new products, technologies, and operating systems as required.

Server build, configuration.

Adding LUN’s and Files systems management on HACMP.

Responsible for testing a mutual takeover configuration in a HACMP environment.

Log calls with IBM for software or hardware issues.

Working with HMC, performing dlpar operations on dlpar nodes, installing OS on lpars using NIM etc.,

VIO Servers, working with virtual adapter – creating client and server adapters, mapping adapters and allocation LUNs to LPARs via VIO etc.,

Working on HACMP related issues.

Configuration of new devices using cfgmgr – faulty disk Replacement in case of any disaster. Working with mirrored logical volumes. Device management, including adding, changing, and configuring physical and logical devices.

Company: IBM INDIA Pvt Ltd Apr 2012 to Aug 2016

Designation: Senior Operations Professional

Manage 5000+ servers

AIX L2 support for IBM Global account (IGA-US)

Worked as an Account Focal and lead a team of 20 members successfully and stabilized the account in short period of time.

Provides overall support and maintenance of operating systems and network connectivity for all AIX systems.

Establishes and documents procedures to ensure data integrity including system fail-over and backup/recovery.

Has the capability to handle the teams successfully. Coordinated and guided individuals to the higher roles.

Took trainings and sessions to the team and educated them on Technical and Process prospective.

Provides reliable backup services. Conducts routine hardware and software audits of AIX servers for compliance with established standards, policies, configuration guidelines, and procedures.

Provides recommendations to management on changes, upgrades, and new hardware as required.

Provides support to vendors and application programmers as necessary.

Maintains current operating systems, PTF levels, and patch versions that comply with vendor requirements.

Coordinates hardware repairs with appropriate vendors on supported platforms as necessary.

Performs research and development on new products, technologies, and operating systems as required.

Maintained all the servers up to date compliant with the ITCS 104.

System Administration and performance monitoring Task on AIX servers.

File system management using LVM, User, Patch and Security Management, Problem determination.

Troubleshooting booting related issues, creating boot records, working with system maintenance mode, accessing rootvg in system maintenance mode, recovering root password, fixing booting related issues, working with bootlist.

Worked on cron and at job schedule, managing log files, errpt, daily management activities.

Disk Storage Management in AIX – Logical and Physical Volume management, configuring disks, working with volume groups, logical volumes, and physical volumes.

Mirroring volumes groups, logical volumes and VGDA and fixing related issues.

Monitoring the system, cpu, memory and disk utilization using topas, sar, vmstat, netstat, nmon, etc

Working with paging spaces – creation, increase, decrease paging spaces as per the requirement.

Fixing Audit related violations.

Using alternate disk installation method for critical servers to reduce downtime.

NFS Administration, exporting filesystems, mounting exported file systems, working nfs daemons and fixing any mounting issues.

Configuring NIM Master, creating resources on NIM to have network installation on clients such as stand-alone servers or lpars.

Working with hardware and software supports.

Working on incident management, problem and change management.

Company: BO-TREE SOFTWARE PVT LTD Jan2009 to Apr 2012

Designation: System Administrator

Provide day to day support for AIX Servers

Work on tickets as part of BAU

Perform changes on AIX servers.

Server build, configuration.

Configured the systems for TCP/IP Networking with the existing LAN, Setting up SSH and SCP.

Log calls with IBM for software or hardware issues.

Handling NFS server issues, mounting issues etc.,

Extensive experience in AIX volume manger

Setting up Network Installation Manager in the next work, configuring resources and perform client installations.

Server installation, good at AIX SMS menus.

Configuring new devices in AIX – expert in device management in AIX

Work on AIX users and security. Security hardening in AIX.

Performing server health checks. AIX error reporting tool, figuring out errors and taking necessary actions.

AIX System backup using mksysb image using tape and as file.

Using NIM server for server recovery (mksysb), TL upgrade or Fix install on NIM clients using NIM server.

Taking system dump in case of any issues with servers and get it analyzed by IBM (by raising software call).

Having good understanding on AIX boot logical volume and fix any booting related issues.

Configuring and monitoring paging spaces and their usage.

Scheduling cron and at jobs.

Working on User Administration tasks, User management, Inittab and Cron management, User related Configuration files, ssh configuration files etc..,

File system housekeeping activities such as log files housekeeping, increasing file systems if there is any data growth.

Root password recovery.

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