SUMMARY

• Around 7+ years of experience as Linux/Unix system administrator on RedHat Linux EL 4.x, 5.x, 6.x, Debian, CentOS 4.x,5.x,Suse,Oracle Enterprise Linux, FreeBSD, Solaris 8,9,10, HP - UX (HP Unix) and VMware vSphere ESX/ESXi environment.
• Experience with VMware vSphere ESXi 4.1/5.0/5.1 and SRM 4.5
• Experience of 6+ years working on Red Hat Enterprise Linux, Sun Solaris, Debian Linux, Ubuntu Linux, MVS, Fedora Linux.
• Experienced working with ITIL methodology.
• Experienced working in FEA and CFD to solve complex problems.
• Experience with all kinds of MS Office like Excel, Outlook, and PowerPoint.
• Experience and Familiar with Virtualization technologies like installing, configuring, administering VMware ESX/ESXi and Citrix Xen Server. Created and managed VMs (virtual server) and also involved in teh maintenance of teh virtual server.
• Good experience in working with teh design and features of teh system architecture.
• Good database experience using (NoSQL, MySQL, CouchDB, MongoDB, Cassandra)
• Worked with License Manager Server Configuration and administration with applications like FlexLM.
• Extensive understanding of networking concepts, (IE. Configuration of networks, router configuration and wireless security, TCP/IP, VPN, Content Filtering, VLANs, and routing in LAN/WAN, Ethernet Port, Patch Panel and wireless networks.)
• Excellent understanding of networking fundamentals and network security. Installation, Configuration and managing Firewalls like Fortinet, ZyWall, SonicWall, ISA with content filtering, Anti-Spam, Web filtering, NAT, Application Publishing to public IP, Port Forwarding, log analyzing with Syslog Server.
• Experience in using a tools like Nmap, hping, Nessus for penetration testing.
• Experience in implementation Intrusion Detection System: Tripwire, Snort, Lids.
• Experienced in using software like LSF and UGE to schedule job tasks.
• Experienced in installation, configuration, design and ongoing maintenance of Cisco router and switches.
• Experience with x86 / x64 Intel, HP, IBM & Confidential hardware like rack-mounted servers, tower servers, desktop, laptop and other peripherals.
• Experience in iSCSI SAN, NAS, NFS storage and RAID concept.
• Experienced and good working with data automation process.
• Experiences in NIS, LDAP, NTP, FTP, DHCP, SAMBA, users setup/troubleshooting.
• Experience managing various filesystem using VxVM, LVM and SVM and also configured filesystem through network using NFS, NAS methodologies and installed RAID devices.
• Experience in deploying teh web applications using Capistrano.
• Experience in Server monitoring, capacity planning, application monitoring with teh halp of Tivoli, HP insight, Nagios, Cacti, Zabbix
• Experienced in creating, mounting file systems and recovering file system errors.
• Performance tuning of Linux machines in teh environment by kernel parameter tuning, identifying process that hog teh system resources and containing them.
• Experienced in scheduling different types of system tasks as per requirement.
• Experience working in customizing teh Kickstart and Jumpstart scripts to automate teh installation of various servers used for various internal projects.
• Good knowledge of installation and update of drivers for HBAs to provide connection between servers and clients.
• Worked with application installations in Univa Grid Engine SGE V6.2.
• Adequate experience in Web Interface Management.
• Experience in managing logical volume manager in Redhat linux.
• Responsible for Backup and Recovery operations of various servers using VERITAS Net Backup.
• Advance Scripting skills in Bash Shell.
• Working Knowledge on using and developing Perl and python scripts used to automate day to day administrative tasks.
• Experienced in working in Network Operations Center (NOC).
• Experience with Cloud servers, LAMP and J2EE applications.
• Adequate experience in providing security baseline using NIST.
• Responsible for OS maintenance activities like upgrading teh OS, updating teh services and third party software’s.
• Worked in maintaining integrity of Linux, Solaris servers by performing patching operations on a regular and planned way.
• Installation and configuration of Web Application servers like Apache, Tomcat and Weblogic.
• Experienced in working with build technologies like Puppet, Jenkins, which are automation tools.
• Have tested various Linux Environments in teh Development/Test Stages to halp create a better standardized environment and resolutions of any problems if any occurred.
• Experienced in documenting various maintenance activities and upgrades and changes in teh network architecture.
• Worked with a bug/problem tracking system in responding to DNS requests, updates and tasks.
• Experience in Microsoft Office Suite, Open Office, Visio, Outlook, Printing, Windows networking, Security patching
• Experienced in user management, process management, software management and daemon management.

TECHNICAL SKILLS

Operating Systems: RedHat AS/ES 2/3/4/5/6, SUSE 9/10, Solaris 9/10, HP-UX (HP Unix), Windows.

Hardware: HP ProLiant, Confidential Power edge, IBM x series

Languages: C, C++, FORTRAN and Pascal, Java coding basics

Database: Oracle 9i, 10g, DB2, MS Access, MYSQL 3.X, NoSQL, CouchDB.

Web Applications: HTML, PHP

Scripting: Perl Scripting, Shell Scripting on Linux

Automation Tools: Puppet, chef, Jenkins, Maven etc.

Networking: TCP/IP, NFS, Telnet, FTP, DNS, DHCP, NAT, ifconfig, routeNetstat, Xinetd, HTTP, SQUID, SAMBA

Web/APP Servers: Apache Web Server, Tomcat Web Server, Websphere

Tools: VMWare, PcAnyWhere, HP-ILO, IBM-RSA, Confidential -RAC

PROFESSIONAL EXPERIENCE

Confidential, Folsom, CA

UNIX/LINUX Administrator

Responsibilities:

• Administration and maintenance of RedHat Linux 5.10, 5.11, 6.5, 6.6.
• Working on User administration setup, maintaining account, Monitor system performance.
• Activities include user administration; startup and shutdown scripts; crontab, file system maintenance, backup scripting and automation using shell scripting (bash, ksh) for Red Hat Linux systems.
• Working on Nagios Monitoring and adding servers to Nagios dashboard.
• Configured servers with various automation tools like Puppet, Chef, Jenkins and Docket on Solaris, Linux and Ubuntu servers.
• Adding physical memory to teh servers.
• Experience in system Software installation and configuration of NFS shares, Auto-Mounter, DHCP and LDAP.
• Install and configure SSH to enable secure access to teh servers.
• Applying patching to teh servers.
• Maintaining and monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Working on splunk app search and reporting.
• Configuring hands-free installation using Kickstart and PXE.
• Writing shell scripts for Automated Back- ups and Cron Jobs.
• Supporting Java applications using middleware like JBoss and Apache Tomcat application servers..
• Configure RAID mirroring on Linux platform.
• Build teh servers from scratch, which include installing RAID, ESXI, and assign IPs, assign Network to Physical machines with Puppet and chef.
• Checking teh datacenter everyday as a part of my work.
• Monitoring of Linux, Solaris servers using tools like vmstat, iostat, SAR, top, free etc.
• Install, Update and erase teh required packages to provide services using rpm and up2date.
• Good knowledge of applying online updates, patches & service pack's for Linux SuSE & RHEL.
• Experience in iSCSI SAN, NAS, NFS storage and RAID concept.
• Worked in creating, mounting file systems and recovering file system errors.

Confidential, Austin, TX

LINUX/UNIX Administrator

Responsibilities:

• Administration and maintenance of RedHat Linux 6.1.
• Worked on Oracle and MySqL Databases and performed performance tuning and troubleshooting.
• Worked on User administration setup, maintaining account, Monitor system performance.
• Activities include user administration; startup and shutdown scripts; crontab, file system maintenance, backup scripting and automation using Perl, shell scripting (bash, ksh) for Red Hat Linux systems.
• Setup and administrate HP UNIX journaled filesystem vxfs with LVM.
• Experience working with HP Unix version B. iv1)
• Experience in system Software installation and configuration of NFS shares, Auto-Mounter, DHCP and LDAP
• Created and modified Veritas Cluster Service Groups and managed switchover from node to node and just as importantly, from interstate primary and DR sites
• Manage logical Volume manager on Red hat Servers.
• Scheduled cluster on Grid and installed applications with it.
• Troubleshooting day-to-day server related issues and problems in terms of operating system, applications and network.
• Experienced working with MVS (Multiple Virtual Storage).
• Worked with ITIL in Linux to enhance efficiency.
• Worked with software like FEA and CFD to solve complex problems.
• Worked on deploying teh web applications using Capistrano.
• Providing security using teh NIST standard security baseline.
• Configure RAID mirroring on Linux platform.
• Worked on NoSQL database using Cassandra.
• Maintained and monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Worked with Cloud servers, LAMP and J2EE applications.
• Worked with managing Web Interface like DRAC/ILOM/SP.
• Configuration and Administration of Load balancers and F5's, taking servers in / out of rotation.
• Installation of VMware ESX3.5.x4.0x infrastructure on Confidential Power Edge Server and administration of VMs
• Experience in installing, integrating, tuning and troubleshooting Apache and Tomcat application server.
• Performed application installation and management on Linux servers for applications like JBoss 4.2.x, 5.x, Oracle
• Configuring, administering and trouble shooting of NFS, AutoFS (Direct and Indirect Maps), NIS (master, slave and client) and DNS in multi-platform networks.
• Performed job scheduling by using LSF and UGE softwares.
• Automated data from different sources for manipulation.
• Worked on teh configuration of mail server using Send mail 8.10.x, 9.x.
• Installation of SAMBA 3.3.x server for interface between Linux servers and Windows servers to share files.
• Install and configure SSH to enable secure access to teh servers.
• Modified teh Linux kernel to add tracing probes for Configuration access tool.
• Environment, Command line, Current working directory, root directory, executed command.
• Experience in Shell scripting bash to automate system administration jobs.

Confidential, Austin, TX

UNIX/Linux Administrator

Responsibilities:

• Installed and Configured RHEL 2.1/3/4, Solaris 10 and Red hat on Intel and AMD hardware
• Setup and administrate HP Unix journaled filesystem vxfs with LVM.
• Installing and Managing HP MC/ServiceGuard cluster.
• Installing and Managing HP-UX Virtual Partitions (vPar) and Node Partitions (nPar).
• Configured hands-free installation using Kickstart and PXE
• Participated in upgrading and migrating 2.x and 3.x to 4.x and 5.0
• Kernel upgrades and applying errata as and when required.
• Monitoring of Linux, Solaris servers using tools like vmstat, iostat, SAR, top, free etc.
• Install, Update and erase teh required packages to provide services using rpm and up2date.
• Setup and configured Apache to integrate with IBM Websphere in load balancing environment
• Partitioning disks using Disk Druid, fdisk with raid options and multipathing with power path on SAN devices
• Configured teh scheduling of tasks using cron.
• Configured License Manager Server and worked with FlexLM.
• Suggesting system Upgrades, planning & implementation.
• Enhanced performance using teh ITIL technology.
• Designed and coordinated teh system architecture.
• Worked on deploying teh web applications using Capistrano.
• Performed virtualization on different types of servers.
• Experienced in administration of MVS.
• Providing administration and troubleshooting user related problems.
• Worked in user management, process management, software management and daemon management.
• Worked with NIST in providing security.
• Constant Monitoring of System Performance and managed file systems.
• Coordinating with vendors to solve teh hardware and software related issues.
• Implemented Security by disabling unused services and using IPtables and TCP wrappers
• Creating new file system, mount file system, monitoring free space, disk usage, locating files and checking & clearing of log files.
• Working with NOC (Network Operations Center).
• Administrative tasks such as System Startup/shutdown, Backup strategy, Printing, Documentation, User Management, Security and Network management
• Provide responsive off-hours support in a 24 / 7 environment and ensure maximum availability of all servers and applications

Confidential, San Diego, CA

LINUX/UNIX Administrator

Responsibilities:

• Installation, administration, configuration of RHEL 5/6 including package management, patch management, regular system administration tasks.
• Installed Redhat Linux on bare metal servers and virtual machines using kick start and hardening teh servers.
• Participated in migrating environment from 4.x to latest 5.x version.
• Creating and cloning virtual machines in VMware environment using Virtual Infrastructure client 3.5 and Vsphere 4.0.
• Worked with design and features of teh system architecture.
• Creating logical volumes, extending teh file systems using both LVM and VxVM 4.1.
• Perform daily maintenance routines on Linux servers, monitoring system access, managing file space and tuning teh system for optimum performance.
• Respond to all UNIX systems problems 24x7 as a part of on call rotation and resolving them on a timely basis.
• Set up user and group login ID, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Administration, package installation, configuration of OEL 5.4 and preparing teh servers for Oracle RAC installation and adding nodes to teh cluster.
• Updated DNS configuration based on teh new servers that are rolled out.
• Worked and performed data-center operations including rack mounting, cabling.
• Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
• Installing and Managing HP-UX Virtual Partitions (vPar) and Node Partitions (nPar).
• Worked on various applications and improving their performance by performance tuning and analysis.
• Responsible for change management, troubleshooting and resolution of server issues for end users support.
• Installing and configuring Apache and supporting them on Linux production servers.
• Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
• Adding servers to teh domain and monitoring them using nimsoft, cacti, sitescope.
• Assist System Administrators with various support issues.
• Writing shell scripts for Automated Back- ups and Cron Jobs.
• Tuning kernel parameters for optimum performance.
• Experienced in Troubleshooting critical hardware and software issues and other day-to-day user trouble tickets.
• Monitored server and application performance & tuning via various stat commands (vmstat, nfsstat, iostat etc) and tuned me/O, memory, etc.

Confidential

AIX/UNIX System Engineer

Responsibilities:

• Involved in installation, configuration and administration of AIX 5.3/5.2 on Pseries server.
• Decommissioning of old hardware and migrating teh application to teh new hardware of P Series.
• Setup and configured network TCP/IP on AIX nodes including RPC connectivity for NFS. Created mount points for Server directories, and mounted these directories on teh Servers.
• Performed IP networking Parallel System support Programs PSSP High availability Clusters.
• Designed and built p-Squadron logical partitioning LPAR profile.
• Diagnosed and troubleshoot software and hardware related problems.
• Implemented & installed AIX 5.3/5.2 and Red Hat AS 4.0/3.0 operating Systems on LPAR using HMC. Good knowledge of installing UNIX based operating systems on LPAR.
• Implemented AIX virtual me/O-VIO Server & built LPARs with VIO Servers host DASD & Virtual Ethernet also applied micro partitioning feature for optimizing CPU utilization.
• Installed and deployed operating system and security related patches and fixes.
• Good knowledge of Hardware management console HMC: update HMC code; manage HMC Users, Configure Network setting for HMC. Managed Power5 p/me-squadrons using Hardware management console HMC.
• Good working knowledge of installing, configuring, and upgrading Blade Center’s Management Module. Good knowledge of Installing and configuring Blade Center's Gigabyte Ethernet switches such as Cisco and Nortel for different subnets using VLAN ID'S.
• Installation and configuration of number of Web Sphere Application Servers (WAS) 5.1/5.4/6.0 instances on development, QA and production environment.
• Responsible for migration and configuration of IBM web sphere application (WAS) 5.4 to 6.0.
• Good knowledge of applying online updates, patches & service pack's for Linux SuSE & RHEL.
• Installed AIX and performed teh operating system upgrade flawlessly. Updating teh existing applications and adding new ones without incident.
• Implemented, installed and supported High availability Cluster HACMP 5.3 on IBM Pseries platform.
• Developed Shell scripts for automating teh batch jobs.
• Involved in Storage management, LVM, File system management, User account management, data backups, data automation and user’s logon support.
• Involved in testing of products and documentation of necessary changes required in this environment.