SUMMARY:

• 8 years of IT experience in Linux/Unix Systems Administration and Server Virtualization, worked closely with Software development, application and database teams to meet business and technical demands
• Experience in installation, configuration, backup, recovery, maintenance, and support of Red Hat Enterprise Linux, Oracle Enterprise Linux, SUSE, CentOS and AIX on Virtual (VMWare) and Physical (HP, Dell and Confidential ) environments
• Experience in Linux - based Virtualization implementations such as VMWare and Xen
• Experience in Managing VMware ESX servers 3.x/4,x/5.x running on HP/Dell/ Confidential, C7000 & Cisco UCS hardware and supported VM’s running Linux and Windows
• Experience in cloning virtual machines using guest operating system template on VMWare ESX server
• Experience in building new servers via VMWare clone using virtual machine templates.
• P2V, V2P migrations using VMware Converter, Plate Spin 6.8.x
• Involved in datacenter migrations, build new infrastructure in new location, migrated servers from old datacenter to new datacenter using tools like clonezilla
• Working knowledge of TCP/IP, FC SAN, NAS and iSCSI
• Working knowledge of EMC and Hitachi SAN infrastructure
• Configuration of Hardware and Software RAID, disk replacement and File system recovery
• Experience in configuring Emulex & QLogic HBA on RHEL along with dm-multipath and PowerPath
• Strong knowledge on Network concepts like f5 load balancer, VLAN trunking on switches, ESX clusters, and physical machines.
• Configured Kickstart for automated network installation of Red Hat servers.
• Installed, Configured and maintained Redhat Satellite Server
• Expert in Configuring Custom Redhat channels, creating standard Kickstart Profiles in RedHat Satellite server
• Expertise in using HMC to create AIX LPAR, DLPAR, micro partitioning
• Experience on working with disk formatting, pvcreate, creating, extending and reducing of Volume group(VG)s, Logical volume(LV)s, disk striping and file systems creation
• Creating, maintaining of user accounts locally and using ldap, user administration, local and global groups on Solaris and Red Hat Linux platforms.
• Maintaining of sudoers file to provide limited sudo access to user to improve the security of the Linux environment
• Worked on configuring network services like NFS, NIS, DHCP, DNS, Web Server, VPN and Firewall
• Installed and setup RHEL servers for applications like WebSphere, WebLogic, tomcat, MQM, SAS, Splunk, ETL and Oracle, DB2, MySQL databases
• Installed and configured WebSphere application servers 6x, 7x, 8x and worked on installing patches (updates) and migrating WAS from previous versions to newer versions
• Experience in updating and creating puppet modules and pushing them to puppet clients.
• Worked on installing Red Hat clusters for DB2 database servers.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding storage.
• Associated with Oracle DBA’s in designing, building and secure hardening of Database architecture for Oracle RAC, ASM and Standalone Database Systems
• Setup and Performance tuning with the command tools like top, vmstat, netstat, tcpdump, iostat, sar, nicstat, wireshark, etc.
• Installed and configured performance monitoring tools like Nagios, Cacti, and tealeaf
• Worked on updating kernel runtime parameters using sysctl to increase the performance of applications.
• Worked on updating network kernel setting like tcp related kernel settings to network performance.
• Applying Security patches on Redhat Linux machines on quarterly basis.
• Served as Lead OS analyst for operating system migration projects from AIX, HP-UX, and Solaris to Linux
• Worked on VMWare VM’s hardware migration project.
• Worked on OS migrations, upgrade and BIOS and NIC firmware upgrades.
• Solid experience with deploying, configuring, monitoring, fault isolation and troubleshooting of 3 tiered applications in load balanced environments
• Ability to quickly adjust priorities and take on projects with limit specifications in a fast paced environments.
• Experience of working in Data centers
• Participate in the 24x7 on call rotation for production environment.
• Experience working on ticketing tools like Remedy, Service Now and HP service manager to resolve helpdesk tickets and change records with defined SLA’s.

SKILL:

Operating Systems: Redhat Enterprise Linux 3/4/5/6x, Confidential AIX(4.3,5.1, 5.2, 5.3)VMware ESX 3x, 4x, OEL 4/5/6, CentOS, Windows, SunSolaris 7,8,9 & 10, SUSE

Programming Languages: C, C++, C#, Objective Java, HTML, XML, BASH scripting, Perl

Networking Tools: NIS, NFS, DNS, TFTP, Ethernet (10/100Base T, Coax, Thick, Fiber opticGiga Bit Cards), Fast Ethernet switches, Load balancers, Network monitoring, Communication Protocols TCP/IP, SNMP, SMTP, OSI, DHCP, TCP Wrappers

Applications&Tools: Java, Apache, tomcat, WebSphere, WebLogic, MQM, PHP, WebLogic, SSH, Puppet, Satellite server, Spacewalk, Kickstart, PowerPath, Multipath, SWAP, Hadoop, Cacti, Nagios, Splunk, Tealeaf, VMWare, Vsphere, VMWare converter, SAS, ETL, Informatica, Jenkins, Java, Remedy, Service Now.

Database: Oracle, MySQL, DB2

Hardware: Confidential x series Servers, HP ProLiant, Dell PowerEdge, HP C7000 & Confidential Blade centers, Cisco UCS

EXPERIENCE:

Linux Administrator

Confidential, Dallas, TX

Responsibilities:

• Installation and configuration of Red Hat Enterprise Linux (RHEL) 5x, 6x Servers on HP, Dell Hardware and VMware virtual environment.
• Worked with Opsware and Redhat Satellite server to deploy Linux servers.
• Worked on Hitachi, EMC SAN. Worked on Disk Array based Environments.
• Configured Dell DRAC and HP ILO for remote management
• Working with network team to setup Network to Linux Environment
• Working with firewall team to run firewall rules for server going to be built behind firewall and setup rules for server to be built in DMZ
• Configure and Support FC-SAN environment and LUN provisioning.
• Configuring and maintaining virtual server environment using VMWARE ESX/ESXi, VSphere, VCenter.
• Create, Manage and configure virtual machine(VM)s on VMWare platform
• Experience in creating new virtual machine (VM) s via clone using existing VMs with guest operating system templates.
• Worked with backup team to backup Linux servers using Netbackup
• Configured PowerPath for SAN devices and Performed Disk management with the help of LVM (Logical Volume Manager)
• Configured LDAP client on all Linux machines, which enables all the Linux users to be authenticated on Microsoft Windows Active Directory Server.
• Management of Red Hat Linux user accounts, groups, directories, file permissions and sudo rules
• Experience in providing day-to-day user administration like adding/deleting users and managing user’s queries and maintained Server using Cfengine
• Configured Redhat Linux servers for SPLUNK installation and involved in splunk installation and worked on increasing the performance using disk striping and changing some VM parameters
• Configured event and file system monitoring tools Envision, Oracle CCC, Snare across the Linux platform.
• Installed and setup performance tools like top, vmstat, netstat, wireshark, tcpdump, iostat, iptraf, sar, free, etc and worked on performance tuning on real time issues.
• Installation and configuration of WebSphere application server (WAS) 6x, 7x, 8x.
• Installed and configured servers for SAS installation, Kernel and Network parameters setup, ulimit settings for SAS installation.
• Deploy servers, Create file systems, setup user permissions, ulimit settings, kernel parameters settings, disk striping, network settings for MQM install.
• Created yum repositories and configured them on the servers and Installed packages with yum and rpm for WebSphere application servers.
• Worked on updating kernel runtime parameters to increase the performance of servers
• Worked on Linux network (TCP) performance tuning with sysctl to increase the network performance.
• Worked on WebSphere application servers patching and migration (upgrade) of WebSphere application servers from previous version to newer version.
• Managed builds and Deployments, Created Ant Scripts to customize EAR, WAR and JAR files and the application is deployed on WebSphere server
• Installation and configuration of Nagios and Cacti on servers used for Network and performance monitoring.
• Worked with Redhat Package Manager (RPM) and YUM
• Pushed RPMs across the Linux platform with the help of BigFix and Rebuild corrupted RPM and LDAP database
• Written custom shell scripts (BASH) and built custom RPM packages to add in post tasks when building new servers.
• Troubleshoot virtual tape drives with mt, tar commands
• Configured version control server (CVS) and Password-less setup for SSH login using ssh-keygen tool.
• Configured Linux servers as clients to satellite server 6 to use it as repository server and used it for quarterly patching.
• Experience configuring and managing Puppet master server and also experience in updating and creating modules and pushing them to puppet clients.
• Experience in configuring Chef in our LAB environment.
• Configuration and administration of DNS, LDAP, NFS, NIS, NIS+ and Sendmail on Redhat Linux servers
• Installed and Configured Web Logic, APACHE and TOMCAT Servers with JAVA Application tools on Red Hat and AIX servers environment
• Experience in deploying Java code using customized scripts and tools like Jenkins.
• Worked closely with application and database (oracle and DB2) teams
• Configured raw devices for database servers, installed and configured Oracle RAC on Red Hat servers
• Installed and configured active-active and active-passive Redhat clusters for DB2 database
• Installed servers for Hadoop Cluster and performed Hadoop Admin activities in the environment
• Migration of HP-UX and AIX to Linux
• Configured system imaging tools Clonezilla and System Imager for data center migration
• Involved in P2V migrations using VMware converter and also involved in Storage and Physical VMotion activities
• Writing BASH scripts to automate the operating system tasks
• Experience working with automation tools like Puppet to push updates of configurations like sudo, ssh, sendmail and patches.
• Performance monitoring using sar, iostat, vmstat and mpstat on servers and also logged to cacti monitoring tool for graphical view.
• Installed, configured HP OpenView and Tivoli monitoring tool for enterprise monitoring
• Build the AIX VIOs and LPAR on the SAN disks without using the internal disks
• Installation and configuration of AIX Dual VIOs Server (Version 1.5.2.1) on new POWEER 6 (p570) System.
• Provided system performance reporting on a regular basis along with keeping all software at current version levels, and maintaining a log of changes for tracking
• Worked extensively on Service Now ticketing system to perform the tasks/Incidents assigned to our team
• Worked intensely on post build process for ongoing projects
• Served as an escalation point to support team.
• Provided 24/7 level4 Linux on call production support on rotation basis. Responsible for maintaining security on Redhat Linux.

Environment: HP DL580-DL380 G3,G4,G5,G7, Dell PowerEdge, Redhat Enterprise Linux(RHEL) 5x/6x, Oracle Enterprise Linux (OEL) 5x/6x, CentOS, AIX, HP-UX, VMWare ESX, VCenter, VSphere, VMWare converter,P2V, V2V, EMC CLARiiON, Netbackup, Oracle, DB2, MySQL, DNS, SFTP, PowerPath, LVM, Java, Jenkins, Apache, Tomcat, WebSphere, WebLogic, MQM, ETL, Informatica, Hadoop, NFS, NAS, RPM, YUM, LDAP, Active Directory, Redhat Cluster, Redhat Satellite server, Puppet, Nagios, Cacti, Splunk, Tealeaf, Cloud, BASH Scripting, Perl, Python.

Unix/Aix Administrator

Confidential, Orange County, CA

Responsibilities:

• Installed AIX 5.3/5.2 on Confidential p670, p590 and p570 using mksysb standard image CDs and NIM installation method.
• Installing Confidential P Series Servers and Mounting them on Rack.
• Installing and upgrading the various flavors of AIX version 5 & Aix Version 6.
• Tuning AIX servers as per our application requirement like Oracle, Tivoli products.
• Upgrading the firmware of Confidential Power 5 and Power 6 Aix Machines.
• Upgrading the firmware of storage (SAN) controller and expansions.
• Installing, Configuring and Maintaining Confidential AIX Servers using LPAR & Mircropartioning.
• Patch and Package Administrations.
• Configuration and administration of Logical Volume Manager (LVM).
• Troubleshooting Hardware and Operating System related issues.
• Creating and restoring the mksysb images using NIM and Setup Cloning using mksysb images.
• Provide Alternate disk installation techniques during the patch management.
• Backup and Restore of Non-Rootvg Volume groups.
• Creating different RAID Levels on SAN and Configuring LUNs.
• Configuring the NIM server for network Installation of AIX.
• Upgrading the P Series UNIX servers.
• Configured LDAP client on unix servers
• Configured Multipathing for connecting Linux servers to EMC clarions.
• Configured Redhat clusters for SAP TREX application
• Analyzing errpt to find any reported problem.
• Implementing veritas NetBackup -6.5 as a backup solution.
• Creating policies NetBackup for controlling the behaviour of backup devices and groups. Tape Device and Media configuration for NetBackup.
• Installation and configuration of Veritas Storage Foundation suite.
• Working on Confidential Blade Center with AIX platform.
• Analyzing Shared storage and Networking considerations for High Availability Cluster (HACMP).
• Experience in installation and configuration websphere application server with Confidential HTTP Server on AIX.
• Implementing veritas storage foundation suite on AIX Servers.
• Using Network installation manager NIM for new & complete overwrite/migration Installation.
• Troubleshoot NIS, NFS, DNS and other network issues.
• Extensive experience in configuring and troubleshooting different RAID levels.

Environment: Dell PowerEdge, Redhat 4x, 5x, Solaris 9/10, AIX, HP-UX, VMware ESX 5.0/5.1/5.5, VSphere, HP ProLiant Servers DL 380/580, Dell Servers (R series),Windows 2008 sever, EMC Clariion, Netapp, SCSI, VMWare converter, Apache Webserver, F5 load balancer, oracle, MySQL, PHP, DNS, DHCP, BASH, NFS, NAS, Spacewalk, WebSphere, WebLogic, Java, Jenkins, JBoss, Tomcat, Kickstart.

UNIX/LINUX Administrator

Confidential, Dallas, TX

Responsibilities:

• Installation and configuration of Red Hat Enterprise Linux (RHEL) 5x, 6x Servers on HP, Dell Hardware and VMware virtual environment
• Installation, setup and configuration of RHEL, CentOS, OEL and VMware ESX on HP, Dell and Confidential hardware
• Installation and Configuration of Sun Enterprise Servers, HP and Confidential Blade Servers, HP 9000, RS 6000, Confidential P series
• Expertise in enterprise class storage including SCSI, RAID and Fiber-Channel technologies
• Configuration and maintenance of virtual server environment using VMWARE ESX 5.1/5.5, VCenter VSphere
• Involved in supporting different HW ranging from Rack to Blade and also supported Vblock HW to run ESX environment
• Configured Enterprise UNIX/LINUX systems in heterogeneous environment (Linux (Redhat &SUSE), Solaris, HP-UX) with SAN/NAS infrastructure across multiple sites on mission business critical systems
• Created a standard kickstart based installation method for RHEL servers. Installation includes all changes required to meet company’s security standards. Installation method is possible over HTTP, or via PXE on a separate network segment
• Adding SAN using multipath and creating physical volumes, volume groups, logical volumes
• Storage Provisioning, Volume and File system Management using LVM, VERITAS Volume Manager and VERITAS File system (VERITAS Storage Foundation), Configuring ZFS file systems
• Creating user accounts, user administration, local and global groups on Solaris and Red Hat Linux platform
• Setup, Implementation, Configuration, documentation of Backup/Restore solutions for Disaster/Business Recovery of clients using TSM backup on UNIX, SUSE & Redhat Linux platforms.
• Installed and configured Netscape, Apache web servers and Samba Server
• Installed and Configured WebSphere Application servers on Linux and AIX
• Installation and configuration MySQL on Linux servers.
• Performed quarterly patching of Linux, AIX, Solaris and HPUX servers on regular schedule
• Heavily utilize the LAMP stack (Linux,Apache,Mysql,PHP/Perl) to meet customer needs
• Installation and configuration of Oracle 11g RAC on Red Hat Linux nodes
• Installed and configured different applications like apache, tomcat, JBoss, xrdp, WebSphere, etc.. and worked closely with the respective teams
• Setup, Implementation, Configuration of SFTP/FTP servers
• Setting up JBoss cluster and configuring apache with JBoss on RetHat Linux. Proxy serving with Apache. Troubleshooting Apache with JBoss and Mod jk troubleshooting for the clients
• Installed Jenkins and created users and maintained Jenkins to deploy Java code developed by developers and build framework.
• System performance monitoring and tuning.
• Working on Shell and perl scripts
• Setting up the lab environment with Tomcat/Apache, configuring the setup with F5 virtual load balancer for customer application
• Document all system changes and create Standard Operating Procedure (SOP) for departmental use. Resolve all helpdesk tickets and add/update asset records using Remedy Action Request System
• Provide 24x7 oncall production support on rotation basis.

Environment: Redhat 4x, 5x, Solaris 9/10, AIX, HP-UX, VMware ESX 5.0/5.1/5.5, VSphere, HP ProLiant Servers DL 380/580, Dell Servers (R series),Windows 2008 sever, EMC Clariion, Netapp, SCSI, VMWare converter, Apache Webserver, F5 load balancer, oracle, MySQL, PHP, DNS, DHCP, BASH, NFS, NAS, Spacewalk, WebSphere, WebLogic, Java, Jenkins, JBoss, Tomcat, Kickstart.

UNIX Administrator

Confidential

Responsibilities:

• Installed and configured servers with Redhat 4, Centos, Fedora
• Kickstart installations and RPM package management.
• Provided day-to-day user administration like adding/deleting users and managing user’s queries.
• Analyzing and monitoring System performance through various system tools such as netstat, iostat, sar & top
• Configured NIS, NFS, Http, CUPS, Samba, DHCP, NAT, Primary Secondary and cache-only DNS servers
• File system management and consistency checks using df,du,e2fsck,mount
• Disk usage monitoring, administering and implementing disk quotas.
• Extensively worked in troubleshooting the hardware and software issues
• Configured multi-tier parent/child relationship squid web caching system
• Extensively worked on software and hardware raid on Red Hat Linux machines.
• Extensive knowledge in configuring Samba and NFS for the sharing of files
• Involved in writing shell scripts for monitoring system usage, backup and recovery strategies, automation of jobs, adding new services to the system.
• Researched and implemented a disaster recovery plan.

Environment: RedHat Linux - 7.x, 9, RHEL 2.1/3, Fedora Core Linux, CentOS, DELL PowerEdge, Dell, HP Hardware.