SUMMARY

• Over 8 years of experience on various Versions of Linux like Red Hat Enterprise Linux, Ubuntu & SUSE
• Build, configure and support RHEL and physical and virtual machines for versions 5.x, 6.x and 7x versions
• Expert in in building Redhat Linux physical and virtual servers & migrating and/or upgrading Linux servers from one OS release to another.
• Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoringand Fine - tuning on UNIX Red Hat Linux Systems.
• Installed, monitored and supported Web and Application Servers on Solaris and Linux environments.
• Strong technical background in Storage, Disk Management, Logical Volume Management (LVM) and logical partitioning.
• Experience in administrating ESXi 4.x and 5.1, 5.5 & 6.0 servers and applying security patches to teh ESXi servers
• Expert in ESXi servers using teh Vsphere client and Vcenter for managing teh multiple ESXi servers and performing teh vmotion
• Experience in differenet kind of migration like Physical to virtual servers and virtual to virtual
• Worked extensively on DHCP, DNS, NFS, NIS, NIS+
• Experience with system monitoring, load balancing, Experience in installing local and remote YUM server on Redhat
• Experience with Oracle RAC clustering and as well as creation and deletion of ASM disks in Oracle RAC
• Experience in using various network protocols like HTTP, UDP, POP, FTP, TCP/IP, and SMTP.
• Proficient in configuring KickStart servers to initiate installation of RedHat Linux on several machines at once.
• Experience in handling teh Confidential service guard cluster, Configuration, Storage migration and managing teh packages
• Experience in Package Management using RedHat RPM/YUM and RedHat Satellite server.
• Oracle RAC and ASM, Installation/configuration of ASM and configuring teh ASM disks
• Creating and maintaining users, profiles, security, rights, disk space and process monitoring.
• Experience in writing Shell scripts using ksh, bash, perl, for process automation of databases, applications, backup and scheduling to reduce both human intervention and ma hours.
• Experience supporting 7x24 production computing environments. Experience providing on-call and weekend support
• Package management and kernel upgrades to teh Linux servers.
• Expert in troubleshooting teh Linux server’s, resolving teh boot issues using rescue methods
• Experience NIC bounding configuration in Linux and UNIX systems to increase teh bandwidth or redundancy based on requirement by teh application.
• Expertise in upgrading Confidential ILO & BIOS Firmware as Confidential recommendation regularly on Confidential servers and chassis (C7000).
• Cisco UCS Blade Infrastructure and with teh different storages like EMC and IBM
• Working noledge of IaaS, PaaS & SaaS and agile environment to resolve teh issues quickly
• Worked on Linux and Windows-based systems administration skills in a Cloud Computing and Virtualized environment for AWS
• Expertise in AWS, experience in implementing new AWS systems and migration of existing systems to AWS
• Worked on Puppet to organize and execute configuration plans on servers
• Worked on Jenkins for Building and Monitoring deployment jobs related to software project
• Worked on Stash and Git-Hub for creating and managing repositories & working on Jira ticketing tool for creating, managing and resolving issues
• Monitored teh servers on Icinga monitoring tool for system performance
• Worked on Splunk for searching errors related to teh issues for monitoring purposes
• Knowledge on OpenStack Cloud software.

TECHNICAL SKILLS

Operating Systems: RHEL 7.x,6.x/5.x/4.x/3.x, Ubuntu, Suse operating systems IBM AIX5.x, 6.x & 7.x Windows 98/2000/XP/VISTA, VMWARE ESX/ESXi.

Hardware: IBM X series, Dell Power Edge hardware(R530, R730,R820 & R920), Confidential Rack server (DL580, DL560) and Confidential Blade server like C3000 & C7000.

Languages: Shell scripting, PERL

Networking: TCP/IP, DNS, NFS, NIS, SSH, DHCP, HTTP, CIFS, Cisco Routers / Switches and LAN

Web Technologies: Lotus Domino 5 / 6, Apache 2.0, Tomcat, WebLogic 8.1/10, WebSphere, JBoss, IPlanet, IIS, HIS.

PROFESSIONAL EXPERIENCE

Confidential, Houston,TX

Sr. Linux Admin

Responsibilities:

• Installed, Deployed Red Hat Enterprise Linux 4.x/5.x/6.x/7.x, CentOS and installation of packages and patches for Red hat Linux Servers.
• Involved in troubleshooting of Redhat Linux server issues and hardware issues and replacements.
• Working with teh hardware vendors and application team for teh faulty replacement and planning teh downtimes accordingly
• Creating customized Kickstart profiles for each server and making ISO to build teh server
• Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satellite server, Up2Date, YUM, RPM tools.
• Performance Tuning and Management for Linux server and working with teh application/database team to resolve issues.
• Creating teh filesystems using redhat volume manager and performing teh healthcheck on regular basis for all Linux serves
• Scanning teh newly assigned LUNs to teh serves and assigning them to volumegroup and increasing teh filesystem using redhat volume manager
• Managed activities for Confidential -UX and Oracle Linux instances to operate, release and maintain both physical and virtual environments
• Performed system configuration and hardening Linux/ Confidential -UX in order to provide optimum performance (plan and implement system changes, adjust parameters and set-up)
• Mounting & unmounting teh netapp storage LUNs to teh Redhat Linux servers and troubleshooting teh issues enocuntered
• Planned and performed teh upgrades on Linux and AIX operating systems and hardware maintenance on Confidential and POWER servers like increasing memory, disk, replacing failed hardware.
• Working on Confidential, Dell servers using DRAC and ILO consoles and resolving issues and replacing teh failure hardware
• Performed kernel and database configuration optimization such dat it limits I/O resource utilization on disks
• Kernel parameter tuning and Performance Monitoring using tools like Glance plus, vmstat, mqstat and addressing swap issues in Redhat Linux servers
• Creating User, Group home directories and password administering in UNIX/Linux servers
• Replication of data from production to DR using IBM Flash technology and bringing teh applications to verify teh DR synch for all Linux servers
• Installation/Configuration of ESXi 3.5, 4.x and 5.1 servers and applying security patches to teh ESXi servers
• Managing teh ESXi servers using teh Vsphere client and Vcenter for managing teh multiple ESXi servers
• Performed Vmotion for teh virtual machines from one ESXi to another ESXi server for teh hardware or ESXi Maintanence
• Planning teh major patch releases by coordinating with teh application team for teh proper implementation of security patches within teh environments
• Involved in migration of Physical to virtual servers (P2V) and virtual to virtual (V2V)
• Creation of VM in ESXI server and deploying teh Linux Operating system
• Assignment of LUN’s to teh VIO server and working with teh SDDPCM for IBM Storage and EMC powerpath drives for teh EMC storage
• Upgrading of powermt/powerpath version to teh latest level
• Installing new software or file sets, packages and other third party applications when required by teh developer or business.
• Checking teh file systems and increase/decrease teh file system if required.
• Fixing mount issues, checking filesystem integrity, running fsck in maintenance mode on rootvg logical volumes if any corrupted lv’s in rootvg.
• Creating teh RAW logical volumes for Oracle RAC and ASM and working with teh database team to resolve teh issues
• Working with teh database team to install/configure teh pre-requisites for teh Oracle database installation/configuration on teh Redhat Linux servers.
• ITM agent installation, configuration and setup monitoring for application logs.
• Configuring NFS on teh servers, working with NFS mounts and related issues.
• Creating /removing paging space, checking paging space usage and increase/decrease if required.
• Closely working & coordinating with application team in case of any production issues
• Working with teh Storage team in case of any data replication or LUN issues.
• Administrating MQ,WAS,HIS, Involved in teh build and support of DEV, QA and UAT WAS 6.1.
• Stop and start of Websphere Instances, MQ channels and IHS (http servers), Installed SSL certificates on teh web servers
• Printer installation & configuration, working with spooler and scheduling teh print jobs
• Modifying teh print queues and administration on print queues
• Installation & Configuration of IBM HTTP Server, make junction works for teh transportation of application through a webserver.
• Worked with MySQL, MS SQL Server, and their feature set
• Created database in Mysql as per teh requirement
• Installed, Configured Mysql in different Linux operating systems like RHEL and oracle Linux
• Building and Working with Amazon EC2 instances, creating teh security groups on teh instance level and using cloudwatch on EC2 instances
• Working experience with teh S3 storage like permissions, object versioning and webhosting with teh S3
• Worked on utilizing Virtual Private Cloud, Building a VPC with teh security and NAT and extending teh VPC access to teh on premises datacenter
• Created AMI’s and ELB with teh high availability and auto-scaling and creating teh load balancer for teh EC2 instances
• EBS Storage, EBS Volumes and snapshot and working with Private and Public IP Address
• Experience in administration & configuration management of Puppet on Linux and puppet enterprise management from teh console
• Modifiying teh manifest as per teh requirement on puppet
• Managed Stash Repositories to pull teh request from develop to master to make changes based on teh Jira tickets
• Worked on Puppet to organize and execute configuration plans on servers & worked on modules of Puppet for its manifests on servers
• Implemented and done maintenance of teh cloud infrastructure and systems
• Worked on Amazon Web Services, including EC2, S3, RDS, Elastic Load Balancing
• Worked on utilizing Virtual Private Cloud to create secure multi-tiered environment
• Co-ordinated with all teh teams for teh Network/Integrated Disaster Recovery drill on yearly basis.
• Monitored system performance using sar, prof, vmstat, iostat, netstat, Nagios..
• Managed and implemented changes, upgrades, security procedures and policies to teh unix client infrastructure.
• Configured DNS Servers and Clients, and involved in troubleshooting DNS issues.
• Documented various regular administrative tasks and backup procedures, communicate with peer groups throughout teh Company to develop best practices.

Confidential, Dallas, TX

Sr. Linux Admin

Responsibilities:

• Installation & configuration of SUSE enterprise server Linux 9.x and applying patches to teh servers in production and in pre-production
• Creating Logical volumes & file system and increasing teh filesystem in SUSE linux servers and
• Installed, Deployed Red Hat Enterprise Linux 4.x/5.x/6.x, CentOS and installation of packages and patches for Red hat Linux Servers.
• Installation, configuration, Troubleshooting and administration of AIX 5L, 6.1 & 7.1 operating systems
• Creating customized Kickstart profiles for each server and making ISO to build teh server
• Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satellite server, Up2Date, YUM, RPM tools.
• Performance Tuning and Management for Linux/AIX server and working with teh application/database team to resolve issues.
• Creating teh filesystems using redhat volume manager and performing teh healthcheck on regular basis for all Linux serves
• Scanning teh newly assigned LUNs to teh serves and assigning them to volumegroup and increasing teh filesystem using redhat volume manager
• Configuring teh drivers for QLOGIC adapters and bringing teh adapters to online to visible in teh Fabric
• System installation and Configuration of AIX 5.x operating system and Redhat 3.x, 4.x & 5.x servers
• User Administration, adding and removing user accounts, changing user attributes.
• Monitoring teh CPU statistics and memory. Managed IBM PSeries servers installed with AIX.
• File system monitoring and checking error messages.
• Working with paging spaces, Creating, increase, decrease paging spaces as per requirement.
• Performed other standard system admin tasks such as system monitoring, performance usage, network support and user support.
• Configure VG’s and LV’s, Extended LV’s for file system growth needs using LVM commands.
• Working on FTP and SSH for remote administration. Monitoring server performance, disk utilization and failedlogins.
• Diagnosing and troubleshooting problems related to Operating System and all hardware.
• Patch Management. Problem determination in File systems and Logical Volumes.
• Creating and managing teh default and User defined Paging Spaces.
• Creating and updating teh Crontab files. NFS Administration. System Resource Controller Administration.
• Corporate client support for mission critical environments
• Responsible for 200 Linux Servers: RHEL 3.0, 4.0 & 5.x, Bash scripting for automation of tasks.
• Day to day problem handling like related to File Systems, Disk, Memory, CPU, Network etc
• Installation and configuration of many OpenSource Packages for company and Clients (SugarCRM, eGroupware, Openfire, Spark, RT, etc. ) .
• Did handle day-to-day IT functions like user/quota/permission/ACL/LVM management.
• Configuration and management of MySQL.

Confidential, Sacramento, CA

Systems Engineer

Responsibilities:

• Deploying teh Redhat Linux enterprise server as like existing versions 5.x, 6.x versions
• Creating teh VM shell and pushing teh operating system using teh kickstart server.
• Creation of Kickstart imgaes for teh different version of Redhat Linux Operating system like 5.x & 6.x
• Confidential blade center C7000 hardware management using ILO console
• Creating teh server profile and making teh network and SAN virtual configuration using Virtual Connect in blade center C7000
• Creating teh filesystems using redhat volume manager and performing teh healthcheck on regular basis for all Linux serves
• Scanning teh newly assigned LUNs to teh serves and assigning them to volumegroup and increasing teh filesystem using redhat volume manager
• Mounting & unmounting teh netapp storage LUNs to teh Redhat Linux servers and troubleshooting teh issues enocuntered
• Creating Link aggregation (LACP) with VLAN tunneling using virtual connect (VC)
• Share uplink set (SUS) using LACP & VLAN tagging
• Performance Tuning and Management for Linux/AIX server and working with teh application/database team to resolve issues.
• Creating teh filesystem and RAW logical volumes for teh Oracle RAC based on teh requirement
• Upgrading teh kernel in all teh Redhat Linux servers and creating initrd image to boot from teh Upgraded kernel
• Migration of Redhat linux servers from 4.x version and working with teh application team to resolve teh issues post migration.
• Installation/Configuration of ESXi 3.5, 4.x servers and applying security patches to teh ESXi servers
• Managing teh ESXi servers using teh Vsphere client and Vcenter for managing teh multiple ESXi servers
• Building teh Red hat Linux server in Vmware ESX client through Vsphere client
• Storage mapping on Red hat linux and create teh Volume group, Filesystems using Logical Volume manager
• Installed/Configured redhat Linux cluster 5x version & Configuring teh cluster resources
• Adding storage to teh cluster disks and increasing/ decreasing teh filesystem in RHEL.
• Creation of Fence devices in teh cluster, Creation Failover domains for teh cluster and Flipover/ Failover test in between teh nodes in teh cluster
• Working on SAN storage on ESXI servers and assigning teh LUNs to teh Virtual Machines running on teh ESXi server.
• Performed Vup 5.0, Sybase 11.5.1, Perl Scripting, NIS, NFS, LDAP server, Weblogic, Apache Tomcat, EMC Storage SAN.
• Working with backup team for teh Legato backup & Restore, Legato client Instllation in teh Redhat Linux server
• Installed and Configured SAMBA Server in Linux for accessing teh shared files from teh windows environment
• Configuring and Maintaining of Network File Systems like (N.F.S) and Auto mount in networks
• Installing and updating Kernel. Created and modified swap files and added swap space
• NTP server and client configuration for synchronization of timing of all teh server with teh NTP server

Confidential

Linux Systems Administrator

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 teh 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 teh same cluster.
• Experience in Windows 2003 and2008 Active Directory Installation and Configuration.
• Heartbeat clustering for high availability in Apache.
• Installed and configured ESXi 5.0, 5.1 Servers on Blade servers. Creating Virtual machines. Creation of templates from VMs and Creation of VMs from templates.
• Configure vCenter Server 5.0, 5.1 in production environment and created many cluster and enabling HA and DRS for Load balancing and High Availability. Worked on Migration concepts like Vmotion, SVmotion and cold migration.
• Performed physical to virtual (P2V) and (V2V) migrations for approximately 50 physical servers utilizing VMware Converter.
• Firmware upgrade, managing teh servers, collecting Logs, open KVM console for troubleshooting.

Environment: Administering 30 ESXi hosts with 100, RHEL 5/6 Linux and Windows OS virtual machines, Windows Server 2003/2008, UCS Chassis, UCS Rack Mount Servers, DNS, DHCP, Active Directory, vCenter 5.0,5.1, VMware ESXi 5,5.1, ESX Server 4.1, P2V Migration, HA, DRS, VMotion, Confidential Blade Servers, Confidential Blade chassis c7000, Confidential Blade Server BL460c G7, SAN, Nagios, Spacewalk, Websphere, Weblogic.