SUMMARY

• 6+ years of extensive experience in Unix/Linux systems as System Engineer and System Administrator on versions of RHEL 4/5/6, SUSE, CentOS and AIX 5.2/5.3/6.1/7.1
• VMware Infrastructure 5.x Installation & Configuration.
• Building VMware templates and installing RHEL 5/6 on them per application requirements.
• Strong experience in Weblogic, WebSphere, Java, J2EE Applications, and SQL
• Performance Monitoring and Capacity planning on UNIX and Linux Servers.
• Configuration, Administration and Maintenance of NFS, DNS, NIS & NIS+ on Linux Servers.
• Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
• Experience in System Administration Driver Configuration.
• 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, EMC MirrorView, Confidential Storage, and Hitachi data storage
• Experience in installation and configuration of Hadoop cluster..
• Setup and configure LDAP servers for home directory location and authentication.
• Experience in networking (TCP/IP, Ethernet), NIS, DNS, NFS, DHCP, SMTP and RAID.
• 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.
• 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, Send Mail, FTP, Remote access on Red Hat Linux.
• Knowledge of Switches, Routers and Firewalls in Networking Area.
• Knowledge of latest tools such as Puppet and Chef
• Custom build of Windows 2003 and Windows 2008 servers which includes adding users, SAN, network configuration, installing application related packages, and managing services
• Strong analytical skills in both the technical and business arenas.
• Quick learner, excellent problem solving skills, highly motivated and adaptable.
• 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 etc
• Provided production support in an on-call rotation in a 24x7 environment.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6, SUsE, CentOS IBM AIX 5.2/5.3/6.1/7.1 Databases MYSQL 5.0, Oracle 8i/9i, 10g, DB2, SQL Server 2000, 2005.

Web Technologies: PHP, HTML, DHTML, JavaScript, XML, CSS.

Web Server: IBM HTTP Server1.3/1.2, IPlanet Web Server 5.1/6.0Netscape Enterprise Server, IIS 4.0/5.0, MQ Series, Apache 1.3x, 2.x.

Scripting: Bash and Shell Scripting

Networks: NIS, NIS+, DNS, DHCP, Telnet, FTP, Rlogin

Networking Hardware: CISCO Switches, Routers and others.

Network Protocols: TCP/IP, NetBEUI, PPP, SNMP, SMTP, DNS, NFSv2, NFSv3

Tools: Smit, Vmstat, Esxi IOstat, top, traceroute, JaspersoftSAR, topas

PROFESSIONAL EXPERIENCE

Confidential, Chicago, IL

Senior Unix/Linux Admin

Responsibilities:

• Administration of RHEL 5/6 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.
• 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.
• Administer and deploy Red Hat servers (Stand alone, via VMWARE and TPM) in Datacenter as well as from business prospective
• Installed and configured Windows servers running DHCP, DNS, Exchange & Active Directories
• 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.
• Build LPAR system and Installed AIX 5.3 and 6.1 on LPAR using NIM Power 5 and 6 systems and Upgraded Maintenance level as well.
• Installed and verified that all AIX/Linux patches or updates are applied to the servers.
• Used Korn Shell, Bash for scripting
• Maintained Puppet-based configuration management in operational and production environments
• 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.
• Installed, configured, and maintained WebLogic 10.x and Oracle 10g on AIX & Redhat Linux.
• 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.
• 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 and updating the tickets using BMC Remedy.
• 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)
• Coordinated with the Storage, Network and Hardware teams on server provisions ( Confidential Proliant DL385/585 G5, G6 servers, and Confidential BL 465C G5 blade centers).

Confidential, Chicago, IL

Unix/Linux Administrator

Responsibilities:

• Installation, Configuration, Maintenance and Administration of Red Hat Enterprise Linux 4/5/6 and Suse Enterprise Linux.
• 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, Solaris Zones, Containers, and Ldoms
• 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.
• 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, New York City, NY

Unix/Linux Admin

Responsibilities:

• Installation, Configuration, Upgrade and administration of Sun Solaris, RedHat Linux.
• User account management and support.
• Jumpstart &Kick-start OS integration, DDNS, DHCP, SMTP, Samba, NFS, FTP, SSH, LDAP integration.
• Network traffic control, IPSec, Quos, VLAN, Proxy, Radius integration on Cisco Hardware via Red Hat Linux Software.
• 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.
• Managing file systems and disk management using Solstice Disksuite.
• Involved in Installing and configuring of NFS.
• Worked on Solaris volume manager to create file systems as per user and database requirements.
• Trouble shooting the system and end user issues.
• Installed, configured and managed VMware infrastructure (ESXI, Virtual Center)
• Responsible for configuring real time backup of web servers.
• Log file was managed for troubleshooting and probable errors.
• Responsible for reviewing all open tickets, resolve and close any existing tickets.
• Document solutions for any issues that have not been discovered previously