SUMMARY:

• Overall 7 years of specialized experience in System Administration, Network Administration and Application Support working on Red Hat Linux 4.x/5.x/6.x/7.x, CentOS 5.x/6.x/7.x, SUSE Linux 10 and Sun Solaris 8/9/10.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX/ Linux environments using shell scripting and CRON.
• Configuration of LVM (Logical Volume Manager) to manage volume group, logical and physical partitions and importing new physical volumes.
• Experienced in kick - start installations, support, configuration and maintenance of Red Hat Linux, CentOS and SUSE Linux .
• Worked on VMware ESX 4.x/5.x/6.x, and Virtual Infrastructure client to create virtual guests.
• Experience in File systems, File Permissions, Exporting & Mounting File Systems, Recovering File system Errors and Device Path Management.
• Experience in networking concepts like DHCP, TCP/IP, IP Addressing, Bonding and Networking Technologies.
• Complete understanding of the various methods of OS patching, Firmware updates and the toolsets that are used to execute the function.
• Configured services like DNS, NIS, NFS, SAN, Send Mail, FTP, Remote access on Red Hat Linux .
• Used Puppet Enterprise to Manage Application configurations in a large Qemu-KVM environment
• Responsible for reviewing and providing technical support, documentation of UNIX server builds and disaster recovery operations.
• Comprehensive Knowledge of Linux kernel tuning, patching and extensive knowledge of Linux system imaging/mirroring using System Imager.
• Experience working on Continuous Integration and Delivery platform as DevOps Engineer.
• Worked on Cloud Infrastructure like AWS, Azure and Open Stack and Virtualized environments VMware, Hyper-V and Citrix.
• Expertise in AWS, experience in implementing new Virtual Private Clouds with private and Public subnets and working with ELB’s, EBS, Code Commit, S3 storage and Simple Workflows.
• Manage the Active Directory environment and created a secure wireless network using Radius 802.1X authentication
• Experience in building Continuous Integration and automation platform using Jenkins and Hudson.
• Worked on Configuration Management tools like Ansible, Puppet and Chef.
• Created Jobs for Builds and Deployments, installed several plugins in Jenkins to support multiple build eco systems required for the implementation of projects.
• Prepared, arranged and tested Splunk search strings and operational strings.
• Experience in automating provisioning of resources in Open Stack Nova (VMs, images), Neutron (networks, ports and routers) and Swift (Customized metadata).
• Experience in user/role/group management using Open Stack to provide fine-grained, secures access to resources.
• Experienced in branching, tagging and maintaining the version across the Environments using VCS tools like GIT, Subversion (SVN) on Linux and windows platforms.
• Worked on Puppet for the deployment of servers with custom scripts.
• Worked on creating various modules in Puppet and automated various facts.
• Added multiple nodes to enterprise Puppet master and managed all the Puppet agents.
• Ability to write Shell, Ruby, Perl, Bash, YAML and Python scripts.
• Good knowledge on Linux administration and shell/bash scripting.
• Possess strong analytical and troubleshooting capabilities, proactive listener and team player with positive approach.

TECHNICAL SKILLS:

Configuration Management: Chef, Puppet, kitchen, vagrant and packer

Continuous Integration: Jenkins, Hudson and Bamboo

Version Control: Git, Code Commit, Bitbucket and Subversion

Project management: JIRA and Confluence

Build Tools: ANT and MAVEN

Cloud Platforms: AWS

Platforms: RHEL 3/4/5/6/7, Ubuntu (Server and Client) Solaris 10/9/8, HP-UX, Windows Client (7/8/10), Windows Server 08/08R2/12/12R2

IDE Tools: Eclipse, Rubymine, Phycharm and NetBeans

Virtualization Platform: VMware ESX and Citrix.

Orchestrator: Chef and Docker

Package Management: Artifactory and Chocolaty

Storage: SAN, NAS, EMC, HP and IBM Storage

Databases/DBMS: Oracle (11g), MySQL, No SQL, MongoDB and PostGREsql

Network: NIS, NFS, AutoFS, DNS, DHCP, NIS+, LDAP and S3 Route

Languages: Shell Scripting, Bash scripting, Python, Ruby, Perl

Web Servers: Apache, Tomcat, IBM WebSphere server, JBOSS and WebLogic

Application Server: Web logic 8x, 9.2, 10.3, 12c, WebSphere.

Third Party Tools: VERITAS Volume Manager, Logical Volume Manager, RAID, VERITAS Cluster, Sun Cluster, HP Service Guard, Red hat Cluster SAR, LVM, FTP, SSL, VMware virtualization, VMware ESX, RAID Technologies.

WORK EXPERIENCE:

Confidential, Raleigh, NC

Sr Linux System Administrator/ Dev Ops Engineer

Environment: Red Hat, Chef, AWS, Ruby, Bash scripts, AMI

Responsibilities:

• Administration of RHEL 5/6 that includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Creating, cloning Linux virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
• Implemented and administered VMware ESX 3.5, 4.x for running the Windows, Centos, SUSE and Red Hat Linux Servers on development and test servers.
• Primary support to all kind of issues for All of Unix and Linux eco systems.
• Worked with Red hat for finding root cause on panic issues.
• Involved in Architect, build and maintain Highly Available secure multi-zone AWS cloud infrastructure utilizing Chef with AWS Cloud Formation and Jenkins for continuous integration.
• Managed Ubuntu, Linux and Windows virtual servers on AWS EC2 instance by creating Chef Nodes through Open-Source Chef Server.
• Developing Configuration Management modules and tools using Opscode Chef and Ruby.
• Creating cookbook for provisioning servers like Jenkins, Splunk, sensu and Chef-server.
• Highly involved in Configuring, monitoring and multi-platform servers by defining Chef server from workstation to manage and configure Chef nodes.
• Experience in setting up the Chef repo, Chef work stations and Chef nodes.
• Development of Chef recipes through Knife command-line tool to create Chef cookbooks to manage systems configuration.
• Involved in chef-infra maintenance including backup/monitoring/security fix and on Chef Server backups.
• Experience with setting up Chef Infra, Bootstrapping nodes, creating and uploading Chef recipes, Chef node convergence in Chef SCM.
• Automated the cloud deployments using chef, python and AWS Cloud Formation Templates.
• Extensively involved in maintaining large amounts of structured, semi-structured, and unstructured data across multiple data centers and the cloud using Cassandra.
• Installing, configuring and administering Jenkins CI tool using Chef on AWS EC2 instances.
• Maintaining a farm of AWS solution using EC2 instances, ELB's, S3, EBS, Auto Scaling and RDS.
• Created database tables that can store and retrieve any amount of data, and serve any level of request traffic using DynamoDB. Worked on NoSQL database Cassandra.
• Working for DevOps Platform team responsible for specialization areas related to Chef for Cloud Automation.
• Installation and configuration of SUDO package accomplished successfully across various UNIX platforms.
• Limiting user account privileges using SUDOERS.
• Excellent hands on experience, in web servers such as Apache Tomcat, IIS, IBM HTTP Server.
• Implemented virtual route reflectors on VMware ESXi and Openstack with KVM/ QEMU
• Configuring and implementing LINUX Kernel re-compilation.
• Installing required software and patches, setting up kernel parameters to suit the applications.
• Work involved fine tuning the kernel on occasions, mirroring file systems for fault tolerance, extending root as well as other file systems according to increase in data volume,
• Manage logical Volume manager on Red hat Servers.
• Troubleshooting day-to-day server related issues and problems in terms of operating system, applications and network.
• Extensive experience with Continuous Integration Tools like Jenkins, and good working knowledge on source repository management tools like GIT, SVN.
• Extensive enterprise experience on Storage Administration, Backup & Restore Management, Disaster Recovery Management on various heterogeneous networks including Storage Area Networks ( SAN), Network Attached Storage ( NAS), Converged Infrastructure & Flash arrays in highly critical environment.
• Well versed in the administration of Windows 2008 Server, Unix, System and SAN & NAS environments; System and Server maintenances activities for data center; proficient in scripting with sound shell / WMI scripting experience.
• Created playbooks for OpenStack deployments and bug fixes with Ansible.
• Debug and resolve Pre-Post OpenStack deployment failures.
• Configuring and supporting installations of applications through Puppet configuration Management.
• Maintaining Nagios servers and adding new services and servers.
• Supporting cloud based apps and databases.
• Implementing and Supporting Puppet Masters and Agents on approximately 500 Nodes for Configuration Management.
• Monitoring & maintaining the distribution of Server data to SAN.
• Expertise in SAN, NAS and storage based on customer performance requirement.
• Implemented/developed corporate Linux patching schedule using Spacewalk and Satellite for over 800 systems.
• Expertise in designing build/configure documentation related to Red Hat Enterprise Linux via Spacewalk /Satellite/Kickstart/Puppet/Cobbler servers.
• Developer of several Perl automated applications which replaced the previous manual tasks.
• Extensive exposure to Configuration Management policies and practices with regards to SDLC along with automation of scripting using BASH /Shell, Perl scripting .
• Design and implementation of Linux, VMware NSX, and cloud solutions on Open stack for building Private/Public Cloud for Large Enterprise application.
• Perform VMware administration which includes cloning, migrating, bios change, expanding and monitoring resources.
• Created customized documentation and process model to optimize client patch management methodologies.
• Analyze change requests (CRs) to ensure that standardized methods ( ITIL methodology) and procedures are used for efficient and prompt handling of all changes, to minimize the impact of change related incidents upon service quality, and consequently improve the day-to-day operations of the organization.
• Ran both Incident Management Working Group and Service Desk Working Group with Program Partners to establish Community wide ITIL Incident Management Processes.
• Configure RAID mirroring on Linux platform.
• Maintained and monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Performed application installation and management on Linux servers for applications like JBoss.
• Configuring, administering and troubleshooting of NFS, AutoFS (Direct and Indirect Maps), NIS (master, slave and client) and DNS in multi-platform networks.
• Implemented automated local user provisioning in instances created in Openstack cloud.
• Configured and managed LVM on Linux using tools like lvextend, lvcreate, resize2fs etc.
• Organizing DR (Disaster Recovery) server tests to make sure the infrastructure is correct and the DR servers are working as expected.
• Supporting Chef Environment with 2000+ servers and involved in developing manifests.
• Worked on Cloud automation using AWS Cloud Formation templates.
• Worked on migration from Datacenter to AWS.
• Worked on Multiple AWS instances, set the security groups, Elastic Load Balancer and AMIs, Auto scaling to design cost effective, fault tolerant and highly available systems.
• Implemented rapid-provisioning and life-cycle management for Ubuntu Linux using Amazon EC2, Chef, and custom Ruby /Bash scripts.
• AWS Cloud platform and its features which includes EC2, VPC, EBS, AMI, SNS, RDS, Cloud Watch, Route53, Auto scaling, Security Groups, Red shift, and Cloud Formation.
• Transferred data from Dynamo DB to Red Shift.
• Written Chef Cookbooks for various DB configurations to modularize and optimize end product configuration.
• Implemented Chef Recipes for Deployment on build on internal Data Centre Servers.
• Used Chef, Knife, Ohia to create cookbooks and recipes to install packages that automate with Linux.
• Setup Chef Cookbooks to perform builds and deployment management.
• Written Ruby shell scripts according to the requirement.
• Responsible for monitoring system health and performance of instances deployed in AWS.

Sr Linux System Administrator/ Dev Ops Engineer

Environment: Red Hat, CentOS, Jenkins, Maven, AWS EC2, Python, Puppet

Responsibilities:

• Deployed, configured and managed more than 3000 servers in various production and networking environment.
• Installed, configured and Administrated of all UNIX/ Linux servers on Amazon Web Services (AWS), includes the design and selection of relevant hardware to Support the installation/upgrades of Red Hat (5/6), CentOS 5/6 operating systems .
• Performed kick-start installations, support, configuration and maintenance of Red Hat Linux.
• Support for Linux /Unix systems administration, operational support and problem resolution for server systems .
• Installation and Configuration of Network bonding - for high available network.
• Created Tomcat and Apache user groups.
• Upgraded Apache and Tomcat in NPE servers to latest version, configured and tested successfully.
• Upgraded Apache and Tomcat in Production servers to latest version, configured and tested successfully.
• Built/installed new servers and involved in deployment activities, environment support including installation, configuration and day-to-day maintenance.
• Worked on FTP servers for sending and receiving files between local and remote servers.
• RPM and YUM package installations, patch and other server management.
• Creating new file systems, monitoring disk usage, checking and backup of log files administration and monitoring the disk based file system.
• Configuring multipath, adding SAN and creating physical volumes, volume groups and logical volumes.
• Installing and configuring Apache and supporting them on Linux production servers.
• Kernel compilation and patch upgradation on Linux servers.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems using shell scripting and CRONTABs.
• Creating and Managing Users / Group accounts and setup a user's work environment.
• Monitoring the File System, CPU load for better Performance and system performance parameters using iostat, vmstat and prstat.
• Responsible for creating puppet modules and manifest files from scratch and experience in editing existing puppet manifests and automated manual installation processes using puppet.
• Involved in several production Implementations and managed deployment processes via DMS and Puppet.
• Expertise in Puppet Administration tool (Ingrown tool), a tool which acts as a puppet dashboard for managing puppet profiles, modules, classes and top scope variables. Expertise in Puppet Promotion tool (Puppet Promo, Ingrown tool), a tool which helps us to promote code/puppet modules across the environments in an organization.
• Experience in troubleshooting issues during Jenkins build process.
• Responsibilities include System administration and system troubleshooting tasks on Linux servers.
• Carried out deployments and builds on various environments using Puppet continuous integration tool.
• Deployed Puppet, Puppet dashboard for configuration management to existing infrastructure.
• Used Puppet to automate Configuration management.
• Used Puppet to manage Web Applications, Config Files, Data Base, Commands, Users Mount Points, and Packages.
• Responsible for Implementing, creating change records and complete understanding of Change Management Process.
• Wrote Puppet manifests for deploying, configuring, Install shield and managing collected for metric collection and monitoring.
• Coordinate/assist developers with establishing and applying appropriate branching, labeling/naming conventions using GIT source control.
• Develop and implement an automated Linux infrastructure using Puppet.
• Experience in creating new Jenkins master and slave servers for production usage and responsible for configuring them as per the Business partner's request.
• Responsible for maintaining and troubleshooting issues related to several Project's Life cycle tools such as Jenkins, and Subversion.
• Deployed Puppet, Puppet Dashboard and PuppetDB for configuration management to existing infrastructure.
• Implementing a continuous Delivery framework using Puppet, Maven & Nexus in Linux environment.
• Worked on AWS Cloud management and Puppet automation.
• Installed/Configured/Managed Jenkins CI Automation.
• Performed the majority of the mission critical Oracle and MongoDB database monitoring.
• Monitor and troubleshoot containers (mule) in production and QA environments.
• Written Python/ shell scripts according to the requirement.
• Setup and Install Puppet workstation, Puppet Server and bootstrapping the Puppet Clients.
• Experience in creating instances in AWS EC2 using Python Boto - 3 Library.
• Automated processes with custom built Python & Shell scripts.
• Configured volume groups, extend volume groups/LVM/file system, exported and imported volume group for hardware.
• Scripting & automating tasks using Python for backup, monitoring and file processing.

Linux System Administrator

Environment: UNIX, VMware, SUN solaris, RHEL, Ansible, AWS, veritas, RETRUST, SuSe Linux, HITACHI

Responsibilities:

• Installed and configured database and FTP segments for the transfer of data between two segments.
• Installed Linux on VMware virtual servers using Virtual Client Infrastructure Console.
• Installed Linux on HP Proliant DL Series servers using integrated lights-Out (ILO) and Virtual Media.
• Patched different software using RedHat Package Manager and YUM.
• Installed certain RPM packages, which were not installed default for Oracle.
• Downloaded latest kernel from YUM server, created repo to make it available for the installation of target servers.
• Created Shell scripts and also worked on existing scripts.
• Automating the installs using Jumpstart and Kickstart and building post install scripts using Shell scripting in SUN Solaris and RHEL Servers.
• Upgraded Linux Kernel using YUM.
• Upgraded current Linux version to RHEL version 5.6.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX environments using shell scripting and CRON.
• Using Bash and Python, include Boto3 to supplement automation provided by Ansible and Terraform for tasks such as encrypting EBS volumes backing AMIs and scheduling Lambda functions for routine AWS tasks.
• Upgraded Solaris 9 to Solaris 10 using Live Upgrade.
• Performed Solaris 9 patching using Live Upgrade.
• Ran RETRUST after upgrading the Solaris operating system.
• Deployed File System in Veritas.
• Disk and file system management using Solaris and VERITAS Volume Manager and Logical Volume Manager for Linux.
• Configuration of NIS based name servers on RH and SuSe Linux for the management of name space.
• Configured NAS Aggregates (RAID4, RAID-DP), Volumes and file systems.
• Configured Auto Support, SNMP based monitoring, Syslog routing for NAS management.
• Worked on NFS Exporting and mounting of NAS file systems to Linux based servers using NFS/NFSv4.
• Assisted the Backup Team in configuring NDMP based backup for NAS volumes.
• Performed all LVM and file system tasks like creation of Logical volume and file system, Mount a file system, Modifying size of a Logical Volume and file system, Removing a file system.
• Performed troubleshooting to make VMware tools run on Linux Guest OS.
• Monitored systems using HP-SIM and Nagios.
• Provided 24x7 on-call / Remote Support for Technical Problems on weekly rotation basis.

Linux System Administrator

Environment: RHEL, Suse Linux, apache, JBoss, VMware, java, Red Hat Linux4,5, x 6 VMware ESX 3.5/4.1, vCenter 5.1, ESXi 5.1, Windows Server 2008 R2, sun Solaris 8,9,10, Solaris Volume Manager, Veritas Cluster Server, Weblogic, Samba, Oracle 9i/10g SAP, 7200.1.0.1.1050., HP DL 385 G6, HP DL380 G7. EMC SAN, VMAX, DMX, EMC Clarian

Responsibilities:

• Supported Clients Environment, and systems troubleshooting that involving RHEL and SuSE server's in a large scale environment.
• Installation, configuration and Operating System upgrade on, Red Hat Linux 4.x, 5.x, 6.x.
• Performance Management & Tuning of RHEL.
• Installed and configured SAMBA server for windows and Linux connectivity.
• Coordinated with security team to deploy of patches and packages to RHEL and Solaris servers.
• Setup and Configuring Kickstart Server for RedHat EL (RHEL) and auto install with Suse Linux Enterprise Server (SLES) / Open SuSE and automated the installation of the servers at a large scale infrastructure environment.
• Package management with yum and RPM.
• Installed, configured, and login 1,500 servers.
• Implemented and configured Backup policies and Storage Units.
• Veritas File system and Veritas Volume Manager are used to configure the RAID 1 and RAID 5 Storage Systems.
• Implemented NIS and NFS for administrative and project requirements.
• Tuning the kernel parameters based on the application/database requirement.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Upgrading RHEL 5.x to RHEL 6.x usiFng live upgrade and manual upgrade.
• File system tuning, growing, and shrinking with Veritas File system 3.5/4.x.
• Worked on network connectivity, SAN storage, creating LVM and taking TSM backup.
• Installed Deployment & system configuration Automation JIRA, HPSA and Puppet server.
• Modifying user's password policies, group policy, UID and GID assignment policies.
• Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat, and cpuinfo to check the CPU utilization, bottlenecks of I/O devices,, memory usage and network traffic.
• Troubleshoot network connectivity used ping, netstat, ifconfig, and trace route commands. Login to the remote system using sudo, putty, and telnet. Transfer files across the systems on the network. Linux technical support and prepared technical documentation for check in verification.
• Regular backing up of critical data and restoring backed up data. Worked in solving tickets issued on day to day activities and problems related to development and test servers.
• Worked on cloning physical machine to virtual machine (P2V) using VMware infrastructure client.
• Installed, configured and supported Apache, JBoss, Oracle 10g, and Clear case. Configuration of virtual hosts, plugins and SSL certificates on web servers and domains and deployments on application servers.

System Administrator

Environment: Red Hat, Shell Scripts, UNIX, EMC, SAN

Responsibilities:

• Build, Configure and Install Red Hat 5/6/7, OS on physical and virtual servers.
• Deployment, configuration and administration of VMware VSphere 6.1 environments as well as Red Hat (5.x and 6.x) and Oracle Enterprise Linux (OEL) environment and installed required binaries and packages.
• Build and Configure RedHat Clusters, manage Local File System and SAN Data File System under Cluster.conf, discuss with Application Areas and register the Application Services for Fail Over functionalities and transition the final working Cluster Environment (Test and Production).
• Worked in configuration of Redhat Satellite server and Managed, configured and maintained customer entitlements including upgrading and patching of Linux servers.
• Monitor daily health of Netbackup server Environments.
• Installed the NetBackup Client on servers that were identified and did not have the client on it already.
• Experienced working with EMC to implement best practices in the corporate environment.
• Implemented these servers/new servers to Netbackup and assisted in the decommissioning phase of backup servers.
• Storage Area Networks (SAN), Network Attached Storage (NAS) and Tape Backup/Restore technology in a mission critical enterprise environment.
• Daily effective and efficient management of SAN/NAS storage and backup infrastructure.
• Close collaboration with server, database and application data owners
• Track and manage service requests, enterprise storage usage and performance.
• Work closely with Storage/SAN/NAS and Backup Systems clients, providing proactive feedback for effective and efficient operation.
• Operational tasks such as storage provisioning, decommissioning, documentation, troubleshooting, request and problem management.
• Data DeDuplication solutions via Avamar, NetBAckup (Appliance and PureDisk), Data Domain Boost, CommVault, and EMC NetWorker.
• Specific, time-sensitive deadlines. Conducted general maintenance and administration of SAN Fabric and Storage Arrays
• Follow standardized procedures as outlined in internal documents. Communicate periodically with users on status, including changes, problems, enhancements, and potential impacts.
• Upgraded enginuity code on VMAX array. Automated and scripted various tasks/jobs as needed.
• Performed firmware updates on SAN Fabric switches. Automa
• Uploading Redhat certificate, handling activations and deactivations.
• Used RHN Satellite exporter command to channel all the packages and deploying rpm packages.
• Identify the complexity of the Application, Data Availability and build Active-Active Cluster Environment in Production Environment.

System Administrator / Application support Engineer

Environment: Unix/RedHat Linux, Vi Editor, Unix/ Linux, Shell Scripts, VMWARE AIX.

Responsibilities:

• Experience with installing and configuring sudo, proposed and implemented the idea of building a master sudoers file, and worked on a script to push the file to client LPAR's on a weekly basis to lock down sudo access as a part of security audit.
• Installed and automated config 2 html scripts on client LPAR's and documented the RGA AIX environment by designing a webpage to access the cfg2html and ganglia output.
• Installed WebSphere Portal Server 5.1/6.0/6.1 and enabled Web Content management.
• Experience in NetApp storage devices, setup, configuration, operations and connecting to pSeries hardware.
• Create virtual media repository and LPAR dedicated virtual optical drives in the VIO servers to make new installations, cloning and migrations faster and easier.
• Set up and troubleshoot issues with Secure Shell in the environment to accommodate script automation and password changes.
• Solid understanding of Keon theory, being able to make directory architectural recommendations such as additions to DIT, schema extensions and indexing, Analyze and implements ACLs.
• Setup and configured TCP/IP network on Linux.
• Installed and configured network services such NFS, NIS and DNS Server.
• Adding physical volumes, creation Volume groups, File systems, Storage allocation, cron jobs, maintenance levels upgrades and applied Fixes for AIX 5.x.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
• Modified Korn and Bourne shell scripts to automate administration tasks like customizing user environment and performance monitoring.
• Users & groups administration and Software installation & maintenance.
• Experience with Integrated Virtualization Manager (IVM), installing configuring and administering MQ 5.3/6.0 on AIX, Linux and Windows environments.
• Installation and configuration of LPARs with AIX 5.3 on P5 servers. Manage LPARs and provide virtual memory management and memory optimization.