EXPERIENCE SUMMARY:

• Eight plus years of extensive experience in Unix/Linux systems as a System Administrator on versions of RHEL 4/5/6/7,Ubuntu and AIX 5.2/5.3/6.1/7.1
• Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
• Experience in System Administration Driver Configuration.
• Expertise in building RHEL servers using Red Hat Satellite Server.
• Worked with Red Hat Satellite Server to push changes across various servers simultaneously.
• Updating patches to keep servers updated against bugs present in the operating system using Red Hat Satellite Server using yum.
• Experience in Virtualization Technology such as VMware, Virtual box and ESxi
• Experience in working with Storage Area Network (SAN), EMC Clariion CX, EMC Symmetrix DMX, IBM XIV, HP Storage, and Hitachi data storage
• Experience in migrating from Old SAN Storage Array to New SAN Storage on both AIX and Linux servers.
• Good knowledge on Kernel Installation/Configuration and accessing APIs (Fork, IOCTL etc)
• Experience working on Red Hat clustering.
• Setup and Manage environment using Chef Configuration Management tool.
• Experience in configuration management tool experience with Chef.
• Written Chef recipes to manage deployments and automation of infrastructure
• Installed Chef Client software on RHEL 6.x/7.x servers and established communication between servers and client.
• Experience in installation and configuration of Hadoop cluster
• Monitor system throughout via Splunk to ensure systems vulnerabilities do not exist.
• Installed/setup and maintained Splunk app for various platform of Operating system.
• Experience in scripting using Korn Shell, and Bash for automating day to day tasks.
• Experience working on AWS infrastructure
• Setup and configure LDAP servers for home directory location and authentication.
• Resolving all software application problems in the production, test, and development environments.
• Experienced with installation of packages, patches, maintenance & RPM updates on Red Hat Linux.
• Experience working on supporting various applications running on Linux such as Websphere, Apache, SAP, Weblogic.
• Experience working on various database such as Oracle, DB2.
• Experience working in Agile (Scrum/Kanban) environments.
• Experience working on Visual Task Boards with details project work been accomplished.
• Extensively worked on Logical Volume Management (LVM) and disk space allocation per user (Quotas).
• Proficient in Storage, Disk Management, Logical Volume Management (LVM) on P - series systems Precisely P770, P750, P720, P690, P650, P595, P570 and P520.
• Configured services like DNS, NIS, NFS, LDAP, OpenLDAP, Send Mail, FTP, Remote access on Red Hat Linux.
• Knowledge of Switches, Routers and Firewalls in Networking Area.
• Strong Analytic ability and Capable of working in a large project Team.
• Experience working with various tools such as top, nmon, vmstat, iostat, netstat, tcpdump.
• Provided production support in an on-call rotation in a 24x7 environment.
• Extensively worked on Logical Volume Management (LVM) and disk space allocation per user (Quotas).

TECHNICAL SKILLS:

Operating Systems: RHEL 4/5/6/7, SLES 9/10/11, Windows 2000/2003, Sun Solaris, IBM AIX 7.1, 6.1, 5.3

Hardware: IBM X Series, Dell, Fujitsu, IBM P Series.

Web/Application Servers: WebSphere Application Server 5.0/6.0,WebLogic Server, IBM HTTP Server, Java Script, JSP, Servlets, EJB

Databases: IBM DB2, Oracle 9i/10/11

Networking: TCP/IP, NIS, NFS, DNS, DHCP, SMTP, POP3, VPN, IMAP, SAN, NAS Cisco Routers/Switches, LAN.

Programming: Bash, Korn Shell, HTML

PROFESSIONAL EXPERIENCE:

Confidential - Chicago, IL

DevOps / Linux Administrator

Responsibilities:

• Administration of RHEL 5/6/7 which includes installation, configuration, testing on both physical and virtual machines.
• Monitored Linux servers for CPU Utilization, Memory Utilization, and Disk Utilization for performance issues.
• Responsible for OS patching, security patching and all upgrades on Red Hat Linux servers using Satellite server.
• Capturing the image of production server, Configuring RAID and build the new server using the image on system imager server with PXE boot.
• Updating YUM Repository and Redhat Package Manager (RPM).
• Performing software installations using yum and RPM.
• Setup and administration of log mining processes utilizing Splunk
• Responsible for creating, editing Chef Recipes for various software installation and automation.
• Worked to update Chef Cookbooks that configure Linux servers to include standard applications needed by app teams.
• Installed and configured Veritas, Volume Manager Server to improve levels of centralization, control, automation, network manageability and protect data loss.
• Created disk groups, volumes, volume groups, and RAIDs using Veritas Volume Manager
• Administration and maintaining of Veritas Cluster Server
• Create and maintain Datacenter, Cluster, Storage Domains using RHEV-M and Vsphere.
• Setting up cron schedules for backups and monitoring processes.
• Installation and configuration of Redhat Device Multipathing.
• Installation, Maintenance, Administration and troubleshooting of Linux and AIX.
• Installed the Operating System on Linux servers and Blades over the network.
• Built servers according to standards specified as per individual applications
• Built virtualized Linux servers on ESX and Blade servers to host multiple applications on same chassis across different server hosts
• Set up Linux servers for iSCSI LUN boot instead of using local hard disks
• Created File systems from local storage as well as NFS partitions for application portability.
• Used Korn Shell, Bash and Python for scripting
• Migrating the application from WebSphere to Jboss
• Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
• Worked and performed data-center operations including rack mounting, cabling.
• Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
• Installing and configuring Apache and Tomcat and supporting them on Linux production servers.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Support and maintenance of old API Gateway versions.
• Migrating batch processing application from .NET to Mule
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage.
• Worked on resolving production issues and documenting Root Cause Analysis.
• Monitored server and application performance & tuning via various stat commands top, vmstat, nfsstat, iostat, tuned I/O, memory, etc.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM)

Confidential - Chicago, IL

UNIX Systems Administrator

Responsibilities:

• Installation, Configuration, Maintenance and Administration of Red Hat Enterprise Linux 4/5/6 and SLES.
• Knowledge of system security, system integration principles and technologies of multiple operating systems.
• Gathering & Understanding the functional specification from the functional document.
• Administrated DHCP, DNS and Samba services in Linux System.
• Troubleshooting Day - to-Day issues with various Servers on different platforms.
• Configuring Backup solutions on SAN/NAS storage.
• Configuration, Administration and Maintenance of NFS, DNS, NIS & NIS+ on Linux Servers.
• Installation, configuration, and administration of VMware.
• Responsible for Patches for the operating system, building startup shell scripts, managing the automation of Cron jobs and managing file systems.
• File system Administration, Setting up Disk Quota.
• Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
• Setup virtual host for new application setup and creating documents.
• Working on evaluating new hardware and software.
• Installed/setup and maintained Splunk app for various platform of Operating system.
• Experience in System Administration Driver Configuration.
• Familiarity with message brokers such as ActiveMQ and RabbitMQ.
• Understanding of common data structures (arrays, hash tables, trees, and linked lists).
• Configuring different systems such as: Oracle ASM (RAC), VCS and CFS, and middleware applications.
• Provide remote support for Linux servers and maintaining SLAs, Performance tuning and enhancing.
• Production Support for 600+Linux Servers
• Customizing the applications according to the business requirements.
• Involved in troubleshooting the performance issues related to web application running on virtual machines
• Responsible for Connectivity Issues among various Servers and Switches and also responsible for installation of various hardware components on various servers.
• Work with Onsite and Offshore development teams for application development and delivery.
• Provide management reporting on daily/weekly/monthly basis.

Confidential - Dublin, OH

UNIX Systems Administrator

Responsibilities:

• Installation, Configuration, Upgrade and administration of AIX, RedHat Linux.
• User account management and support.
• Responsible for configuring and managing Level1/Level 2 issues on UNIX servers and escalate to Level 3 team when needed.
• Configuration and Administration of NIS environment.
• Involved in Installing and configuring of NFS.
• Installed, configured and managed VMware infrastructure (ESXI, Virtual Center)
• Responsible for reviewing all open tickets, resolve and close any existing tickets.
• Document solutions for any issues that have not been discovered previously
• Ensure safe and secure backup and storage of organizational data and all the servers.
• Evaluate IT equipment and plan for future hardware needs & software needs.
• Ensure safe and secure backup and storage of organizational data.
• Troubleshooting network problems such as routing, repairing systems in case of crash.
• Installation of Technology levels/patches, APARs on AIX.
• Performed routine checks on nodes by monitoring syslogs and error logs for system and hardware errors.
• Managed mksysb backups, worked with backup team on data migration and disaster recovery related issues.
• Configured SSH, Managed Logical volumes, file systems, paging space issues.
• Monitored trouble ticket queue to attend user and system calls.