SUMMARY

• 8+ years’ experience Managing Large Scale Enterprise Datacenters with core Skills revolving around Complete Linux (CentOS, RHEL, SUSE, Ubuntu) Installation, Configuration & Troubleshooting.
• Worked in infrastructure team on installation, configuration and administration of CentOS 5.x/6.x/7, RHEL 5.x/6.x/7, Windows Server 2008 - R2/2012-R2 and SUSE Linux 10.x/11.
• Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on UNIX Red Hat Linux Systems.
• Extensively worked With VMware ESXi 5.1/5.5/6.0, vCenter Server, Host Clustering with HA, DRS, Replication Manager 5.x/6.0, Site Recovery Manager, vMotion, Physical to Virtual Migration and Managing SAN Data stores with, iSCSI, NFS & FC.
• Configuration & Management of AWS (Amazon Web Services) like VPC, EC2, S3 Buckets, Route53 DNS, RDS, EBS, ELB etc.…
• Worked with Chef Enterprise Hosted as well as On-Premise, Installed Workstation, Bootstrapped Nodes, Wrote Recipes and Cookbooks and uploaded them to Chef-server, Managed On-site OS/Applications/Services/Packages using Chef as well as AWS for EC2/S3/Route53 & ELB with Chef Cookbooks.
• Responsible to deploy Hadoop cluster, add and remove nodes, monitor critical parts of the cluster, configure name-node high availability, schedule and configure it and take backups
• Researched and worked from start to the end on installing and configuring HDP security model i.e. Rangers authorization and Knox for Ambari cluster.
• Experience in working on source control tools like Tortoise SVN, CVS, IBM Clear Case, Perforce, and GIT.
• Managed all the bugs and changes into a production environment using the Jira tracking tool.
• Involved in setting up JIRA as defect tracking system and configured various workflows, customizations and plugins for the JIRA bug/issue tracker.
• Experience NIC bonding/NIC Teaming configuration in Linux/UNIX/Windows/VMware systems to increase the bandwidth or redundancy based on requirement by the application.
• Managing DNS, LDAP, FTP, Tomcat & Apache web servers on Linux servers.
• Expertise in implementation and maintenance of Apache Httpd, SMTP, DHCP, NFS, NIS, NIS+, LDAP, DNS, SAMBA, SQUID, Postfix, send mail, FTP, Remote Access, Security Management & Security trouble shooting skills.
• Installed, Configured, Managed Monitoring Tools such as Splunk, Nagios, iCinga for Resource Monitoring/Network Monitoring/Log Trace Monitoring.
• Expertise in writing Bash Scripts, Pearl Scripts (hash and arrays), Python programing for deployment of Java applications on bare servers or Middleware tools.
• Extensively worked on Jenkins/Hudson by installing, configuring and maintaining for the purpose of continuous integration (CI) and for End to End automation for all build and deployments.
• Worked with Ansible playbooks for virtual and physical instance provisioning, configuration management, patching and software deployment.
• Deployed Docker Engines in Virtualized Platforms for containerization of multiple apps.
• Experience working with Puppet Enterprise and Puppet Open Source. Installed, configured, upgraded and managed Puppet Master, Agents & Databases. Integration of Puppet with Apache and Passenger.
• Installed and managed Middleware tools through Puppet such as WebSphere Application Server 7.x/8.x, JBOSS
• GA7/EAP6, IBM IHS, Apache & Tomcat.
• Experience using MAVEN and ANT as build tools for the building of deployable artifacts through Jenkins (jar, war & ear) from source code.
• Strong appetite for learning new technologies with positive attitude. Created Custom as well as downloaded pre-written Modules and Manifests, Worked and utilized Puppet hierarchy files, facts, and global variables.
• Installation, Configuration and Management of RDBMS and NoSQL tools such as SQL Server 2008/2012/2014 , MySQL, DB2, PostgreSQL, MongoDB & Cassandra.

TECHNICAL SKILLS

Operating Systems: RHEL/CentOS 5.x/6.x/7, Ubuntu/Debian/Fedora, Sun Solaris 7/8/9/10

Databases: MySql, MongoDB, Cassandra, PostgreSQL, SQL Server

Web/App Server: Apache, IIS, HIS, Tomcat, WebSphere Application Server

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

PROFESSIONAL EXPERIENCE

Confidential, Houston, TX

Linux/Unix Admin

Responsibilities:

• Yum configuration & package installation through YUM.
• Configuring and deploying of iSCSI server and Client.
• Installation of Red Hat Enterprise Linux.
• Configuration and troubleshooting for Red Hat Linux.
• Handling troubleshooting issues like boating, RPM packages, User management and backup.
• IP bonding for load balancing and fail over, Firewall, SELINUX.
• Hosting and securing web pages using Apache (httpd) web server and ssl.
• User Administration & Quota Management
• Creating and deploying LVM, resizing the logical volume and volume group.
• Configuration and administration of LDAP, NFS, FTP, SAMBA and POSTFIX Servers in Red Hat Enterprise Linux.
• Performances, CPU and Memory monitoring of Red Hat Enterprise Linux.
• Create, deploy and manage Linux and windows VM using Red Hat Enterprise Virtualization Manager, which includes moving and migrating VM from one cluster to another cluster or within the same cluster.
• Experience in Windows 2008 and2012 Active Directory Installation and Configuration.
• Heartbeat clustering for high availability in Apache.
• Installed and configured ESXi 5.5 and 5.1 Servers on Blade servers. Creating Virtual machines. Creation of templates from VMs and Creation of VMs from templates.
• Performed physical to virtual (P2V) and (V2V) migrations for approximately 50 physical servers utilizing VMware Converter.
• Firmware upgrade, managing the servers, collecting Logs, open KVM console for troubleshooting.

Confidential, NYC, NY

Linux System Admin

Responsibilities:

• Administer groups and file permissions in Linux Servers.
• Backup done with tar, gzip, etc. utilities.
• Coordinate Incident Management activities.
• Create and manage user accounts on Linux Servers.
• Experience in Installation, Configuration, Support & Maintenance of Redhat Linux Enterprise Server.
• Install startup scripts for various applications.
• Install security fixes, kernel and OS patches.
• Install and update various programs using yum.
• Manage and diagnose gfs clustered environments.
• Manage disk and file usage.
• Maintain LVM best practices - ext3, gfs, XFS, Multi-Pathing, striping, resizing.
• Minimized server downtime.
• Monitor system performance using Nagios to ensure production jobs completed
• Perform configuration management in coordination with security guidelines
• Proficient in OS upgrades and Patch loading as and when required.
• Provide on call after hours support for escalated problems and conducted bridge calls with Tier III support, Operations Maintain Wiki pages, documenting procedures and Knowledge Base Instructions (KBI)
• Provided system administrative support on a project managed by HP on Linux servers
• Provide system administrative support on a project managed by Ace Info Solutions on Linux servers
• Scheduling job using Crontab
• Support the project through the Remedy ticketing system to meet service level agreements
• Support, Operations Management, and Vendors
• Suppress server issues from monitor by placing them in outage file for maintenance
• Support the project through the Remedy ticketing system to meet service level agreements
• Trouble shooting and solving computer (software and hardware) issues.
• Work with system users to provide support and resolve problems in a timely manner.

Confidential, San Francisco, CA

Linux/Unix Administrator

Responsibilities:

• Provided 24x7 on-call supports in debugging and fixing issues related to Linux, Solaris, HP-UX Installation/Maintenance of Hardware/Software in Production, Development & Test Environment as an integral part of the Unix/Linux (RHEL/SUSE/SOLARIS/HP-UX/AIX) Support team.
• Installation Red hat Linux Enterprise Server 5/6 on Dell and HP x86 HW.
• Installation of Web logic, upgraded to service pack updates, installed BEA patches, configuring and creation new domain & services starting & stopping.
• Planning and implementing Backup and Restore procedures using Ufsdump, Ufsrestore, Tar” and “Cpio”.
• Installed and configured the Red Hat Linux 5.1 on HP-Dl585 servers using Kick Start.
• Monitoring day-to-day administration and maintenance operations of the company network and systems working on Linux and Solaris Systems.
• Configured the NIS, NIS+ and DNS on Red Hat Linux 5.1 and update NIS maps and Organize the RHN Satellite Servers in combination with RHN Proxy Server
• Installed and configured the RPM packages using the YUM Software manager.
• Configured logical volumes using logical volume manager (LVM) and also configured mirroring.
• Production support of Apache, PHP, My SQL, Tomcat including installation, configuration, management and troubleshooting.
• Involved in developing custom scripts using Shell (bash, ksh) to automate jobs.
• Defining and Develop plan for Change, Problem & Incident management Process based on ITIL.
• Merged the generated reports as per request. Formatted data into required format using UNIX Shell Scripts, SED and Awk.
• Networking communication skills and protocols such as TCP/IP, Telnet, FTP, NDM, SSH, rlogin.
• Deploying Veritas Clusters and Oracle test databases to implement disaster recovery strategies, ensuring uninterrupted availability of the global systems.
• Configured Logical storage Manager (LSM) for root disk encapsulation and implemented root disk mirroring for fault tolerance.
• NIS, NFS, AUTOFS, NTP Configuration and Administration.
• Define Mapping Servlets, Filters, and Session Configuration on JBOSS.
• Production support of Apache and JBoss including installation, configuration, management and troubleshooting. Installation and monitoring of Veritas Volume Manager, Veritas NetBackup and Veritas Cluster Server on SAN Environment.
• Worked on the administration of the JBoss servers including installation and deployments.
• Extensive experience in Security Patching.
• Also coordinating with storage team and networking teams.