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Sr. Unix/linux Administrator Resume Profile

Colorado, SpringS

Summary:

  • Around 8 years of experience as UNIX System Administratorwith expertise in Linux Redhat RHEL 3/4/5/6 , AIX 6.1/5.3/5.2/5.1/4.3.3, Solaris 8/9/10, HP-UX 10.x, 11.x , and Windows NT/2000/2003 in heterogeneous environments.
  • Expertise in System Administration, Installation, Configuration, troubleshooting and Performance tuning of Red Hat Enterprise Linux, IBM AIX, Sun Solaris Windows Servers, and working knowledge of HP-UX.
  • Extensive experience in building servers using Jumpstart and Kick-start Process.
  • Expertise in package management using Red Hat RPM, YUM used in several Linux distributions such as Red Hat Enterprise Linux, SUSE Linux Enterprises and Fedora.
  • Worked in configuration of Redhat Satellite server and Managed, configured and maintained customer entitlements, upgrading and patching Linux servers.
  • Experience in backup and restore operation on multi Volume Manager, Logical Volume Manager LVM , Solaris Volume Manager SVM and VERITAS File System
  • Implementation of RAID levels like 0, 1, 0 1, 1 0, 5 using VERITAS Volume Manager.
  • Expertise in configuring and administering NIS, NIS , NFS, DNS, LDAP, DHCP, Mail Servers and Web Servers like Apache HTTP Tomcat in heterogeneous environments.
  • Hands on Experience in Designing, Creating/building and managed Dual VIO Server and VIO Client LPARS/DLPARS on P6 and P5 Hardware platforms through HMC V7.R3, V6 and HMC V5.
  • Expertise inunderstanding of error logging subsystem, resolving technical issues by Diagnosing, Problem determination, Troubleshooting and providing Root Cause Analysis.
  • Extensive Experience on HACMP 5.x Cluster Configurations, Administration and Trouble shooting.
  • Expertise in NIM master server, NIM client setup and configuration, managed NIM resources and installed BOS on LPARS IBM power6, power5 p595, p590, p570, p550, p520 and power4 p690, p630 machine .
  • Knowledge on IBM X series servers.
  • Expertise in installing and configuring Redhat Cluster Server,MC Service Guard, VERITAS Volume Manager.
  • Experience with IP Bonding betweenNIC cards, firewalls, proxy servers, IP Phone systems, Antivirus, authentication based event log events, application firewalls windows servers and workstations.
  • Experience in ArcSight Enterprise security manager ESM - SIEM tool.
  • Experience with the Ethernet switches 10/100/1000, Gigabit, Fast Ethernet, IP addressing, subnetting.
  • Implemented and configured the protocols TCP/IP, Ripv1, Ripv2, OSPF, EIGRP, BGP, PPP and Frame Relay.
  • Configured Users Security administration, backup, recovery and maintenance of various activities.
  • Advance level of experience in researching OS Issues, Applying Patches and opening the vendor Tickets
  • Experience in VMware. Installed and monitored Virtual environments withESX4, ESX 3.x, ESXiservers and VirtualCenter2.X.
  • Managed Linux production servers using VMWARE vSphere client like monitoring performance of the servers, accessing console, troubleshooting server, accessing booting parameters etc.
  • Excellent experience on creating zones and installed applications on individual zones. Responsible for configuring and maintaining global and local zones
  • Strong experience in backup recovery and maintenance of various activities.
  • Experience in using Perl, shell scripting for Applications, Backups and scheduling.
  • Experience in monitoring, managing and resource pool using commands poolstat, psrset, prstatandmpstat.
  • Troubleshooting and implementing security features in firewall according to the changes in the network
  • Performance monitoring and capacity planning.
  • Experience of working in Data centers with 24X7 Production and On-Call Environments.
  • A good team player with ability to lead and motivate a team to achieve desired objectives. Willing to take on extra responsibilities to get work done.

TECHNICAL EXPERTISE:

Operating systems:

RedHat Linux RHEL 3/4/5/6 ,IBM AIX 6.1/5.3 , Solaris 10/9/8, HP-UX 11.00, 11.11, 11.23, 11.31 , Windows NT /2003/XP

Server hardware:

Excellent Hardware skills on IBM p-Series P690, P570, RS6000, Sun Fire 3800/4800/6800, HP ProLiant DL585/360/385/585 G2, rx8640, rp7420, rp8420, N-Class, L-Class, D-Class, K-Class, T-Series M-Series, IBM/HP/DELL Blade Server r710

Storage hardware:

Symmetrix DMX 800/1000 / DMX-2 / DMX-3 EMC CLARiiON FC and CX Series, FC JBOD, Brocade FC Switches, Net App Filers, Qlogic and Emulex FC HBAs, Brocade silk worm 3200, 3800,48k, iSCSI/ FC Storage arrays, RAID Storage arrays, DLT and LTO Tape Libraries, Hitachi enterprise systems

Cluster Solutions:

HACMP 5.4./5.3/5.2/5.1, Redhat Cluster Suite, Sun Cluster 3.0, 3.1, Service Guard 11.16/17/18

Scripting language:

Ksh, Perl, Bourne shell.

Networking Services:

NIS, NFS, AutoFS, DNS, SSH and Sendmail.

Ticketing Tools:

HP Service Manager, Remedy, Service Centre and OPAS.

PROFESSIONAL EXPERIENCE

Confidential

Sr. Unix/Linux administrator

Responsibilities:

  • Build, Configure and Install Red Hat 5/6, OS on physical and virtual servers.
  • Troubleshoot build, install, configuration, performance, monitoring and other process issues of the servers and the selected application environments.
  • Provide 24/7 support for UNIX LINUX, AIX HP-UX production servers for Agilent Technology Applications.
  • Responsible for the support of around 1500 UNIX servers in Development, Production and DR environments.
  • Resolve the tickets raised by application teams using HP service manager 9 SM9 .
  • Monitoring and maintain the UNIX servers and scheduling backups across Agilent enterprise and engineering environments.
  • Good knowledge on Flash p840 , power systems. Assigning LUNs to NIC using HMC.
  • Established link between switches in production and DR site in same fabric. Production Support on Linux/AIX Systems in a 24/7 Production Environment to ensure maximum availability of all servers and applications.
  • Co-developed Account propagation, Threshold value for servers and email service through Perl scripts.
  • Experience in managing Linux production servers using VMware vSphere client.
  • Monitoring the performance of the servers, accessing console, Alarms etc through vSphere client.
  • Conduct effective Vendor meetings to identify key performance issues, raise tickets and work with vendor on high priority issues and their resolutions.
  • Monitoring data center for any issue with hardware and network related issue.
  • Generate SSL Certificates for the applications, install and ensure the authenticity is maintained.
  • Perform cold-migration of Virtual Machines from one host group to another and manage resource load on the host groups under the VCenters.
  • Interact with Network Team, discuss and address issues related to physical and virtual servers, manage all ACE Load Balancers in DMZ and Protected Environments.
  • Good knowledge of Industry security best practices, log collection and log management.
  • Identify SAN, troubleshoot SAN Issues, build Physical Volumes, Volume Groups, and Logical Volumes, build File Systems, extend File Systems on Live Production servers, mount unmounts NFS and NAS File Systems.
  • Build and Configure RedHat Clusters, manage Local File System and SAN Data File System under Cluster.conf, discuss with Application Areas and register the Application Services for Fail Over functionalities and transition the final working Cluster Environment Test and Production .
  • Take self-decisions under certain circumstances, discuss with team and execute the preferred method to resolve complex issues.
  • Play a key role in identifying the requirements of the Application Owners and ensuring that all the related teams are on the same side of the decision.
  • Knowledge on CISCO nexus switches.

Environment: Linux RHEL 5/6, DELL R710, R720, R910, HP ProLiant DL-380, DL-580 G6/G7, DL-680 G7/G8, VM-WARE ESX 5.x, VMWARE VCenter, VSphere OVF, Change Management, Capacity, Performance, Testing, Shell Scripting Perl , Networking- LAN, Ethernet, VLAN , PV, VG, LV, , WEBLOGIC Server 5.1 6.0, Windows 2000 / 2003, SAN / EMC.

Confidential

Sr. Unix/Linux administrator

Responsibilities:

  • Experience in leading 3 people.
  • Build, Configure and Install Red Hat 5/6, OS on physical and virtual servers.
  • Assess the Licensing, Performance, Stability, and Scalability of the Applications and virtualize their environments if compatible.
  • Discuss with architect and build Virtual Machines from OVF templates and configure the templates with necessary resources and functionalities.
  • Troubleshoot build, install, configuration, performance, monitoring and other process issues of the servers and the selected application environments.
  • Create Change Records, walk through construction of tasks to validating and approval steps and deploy application enhancement in Development and Production Environments.
  • Perform cold-migration of Virtual Machines from one host group to another and manage resource load on the host groups under the VCenters.
  • Good knowledge of Industry security best practices, log collection and log management.
  • Implemented URL Filtering for all the external customer calls to allow registered API calls and their end-points.
  • Configured and implemented the application server environment to handle and allow all the Cisco API calls.
  • Identify SAN, troubleshoot SAN Issues, build Physical Volumes, Volume Groups, and Logical Volumes, build File Systems, extend File Systems on Live Production servers, mount unmounts NFS and NAS File Systems.
  • Build and Configure RedHat Clusters, manage Local File System and SAN Data File System under Cluster.conf, discuss with Application Areas and register the Application Services for Fail Over functionalities and transition the final working Cluster Environment Test and Production .
  • Identify the complexity of the Application, Data Availability and build Active-Active Cluster Environment in Production Environment.
  • Take self-decisions under certain circumstances, discuss with team and execute the preferred method to resolve issues.
  • Discuss with Capacity and Hardware about the upcoming Server Hardware required and keep the project posted about the Provisioning dead-lines.
  • Capable of handling Test and Production environments and keep the team posted and updated about any upcoming change in Infrastructure.
  • Play a key role in identifying the requirements of the Application Owners and ensuring that all the related teams are on the same side of the decision.
  • Very friendly at work and ability to handle multiple tasks and work extra time if necessary to handle high pressure situations.

Environment: Linux RHEL 5/6, DELL R710, R720, R910, HP ProLiant DL-380, DL-580 G6/G7, DL-680 G7/G8, VM-WARE ESX 5.x, VMWARE VCenter, VSphere OVF, ArcSight Enterprise security manager ESM , Change Management, Capacity, Performance, Testing, Shell Scripting Korne Bourne , Networking- LAN, Ethernet, VLAN , PV, VG, LV, , WEBLOGIC Server 5.1 6.0, Windows 2000 / 2003, SAN / EMC.

Confidential

Sr. UNIX Administrator

Responsibilities:

  • Designing and configuring of Red Hat Enterprise Linux 5/4/3 and large AIX systems p6, p5 , Building LPRAS, VIO Client LPARS installed VIOS 2.3. User Administration, management and archiving.
  • Expertise in Performance Monitoring and Performance Tuning using Top, prstat, SAR, vmstat, ps, iostat etc.
  • Expertise in package management involves creating, installing and configuring of packages using Red Hat RPM. Used RPM in several Linux distributions such as Red Hat Enterprise Linux, SUSE Linux Enterprises and Fedora.
  • Extensive experience in building servers using Jumpstart and Kick-start Process.
  • Worked in configuration of Redhat Satellite server and Managed, configured and Maintained customer entitlements including upgrading and patching of Linux servers
  • Uploading Redhat certificate, handling activations and deactivations.
  • Used RHN Satellite exporter command to channel all the packages and deploying rpm packages.
  • Administration and troubleshooting HACMP Cluster Environment and Failover and fall back test on mutual takeover and rotating HACMP Environment.
  • Configuring NFS, NIS, NIS , DNS, Auto Mount Disk Space Management on SUN Servers.
  • Experience in Configuring and Managing SAN Disks, Disk Mirrors RAID 0, 1 5 Levels.
  • Designed and developed ArcSight architecture components and related upgrades.
  • Maintained and modified hardware and software components, content and documentation.
  • Provided guidance for equipment checks and supported processing of security requests.
  • Created/expand file systems in Linux volume groups and Logical Volumes and Solaris using volume managers
  • Experience in backup and restore operation on multi Volume Manager, Logical Volume Manager LVM , Solaris Volume Manager SVM and VERITAS File System.
  • Disk and file system management through VERITAS Volume Manager.
  • Installation, configuration and administration on Redhat Cluster Server, Service Guard. Configured new service group resources for new application in High Availability environment.
  • Installed configured and troubleshootedRedHat Linux 6.0 issues.
  • Configured Users Security administration, backup, recovery and maintenance of various activities.
  • Advance level of experience in researching OS Issues, Applying Patches and opening the vendor Tickets
  • Maintained and documented all the errors and logs that were new to the environment shared the KT with the team.
  • Experience in Disaster Recovery and Planning.
  • Server Consolidation and Migration of Applications on Oracle and Java Applications.
  • Installed and monitored VMwareVirtual environments withESX4ESX 3.x, ESXi servers Virtual Center 2.X.
  • SENDMAIL configurations and administrations, testing the mail servers.
  • Experience in adding and configuring devices like hard disks and backup devices etc.
  • Monitor daily Net Backup activity and reports to proactively avoid issues.
  • Improve automation and productivity of backups through scripting enhancements.
  • Modify and Optimize backup schedules.
  • Created/maintained GFS Global File System in Linux environment. Supported Oracle RAC.
  • Troubleshooting and administering High Availability Clusters using VERITASCluster Server, Sun Cluster and HP Service Guard on various business critical database application production servers.
  • Gained a good knowledge of Red Hat Clustering troubleshooting areas such as heart-beat between the servers and proper configuration for high availability.
  • Used VMware for testing various applications on different operating system.
  • Provided 24x7 supports on pager rotation basis.

Environment: Linux RHEL 3.4, AIX 6.1/5.3, IBM RS/6000, P Series Server, Solaris 8 / 9, HP-UX, Sun Enterprise Server, HP 9000, UDB DB2 V8.x/9.x,Net Backup 6.x, Shell Scripting Korne Bourne , ArcSight Enterprise security manager ESM , SENDMAIL protocol, LVM, Apache 2.x, 3.x, IPLANET 4.x, 5.x, WEBLOGIC Server 5.1 6.0, DLT 7000 tape drive, HP-UX 11/11i, Windows 2000 / 2003, SAN / EMC

Confidential

Sr. UNIX Administrator

Responsibilities:

  • Installation, Configuration Upgrade of Solaris, Red-hat Linux, AIX, HP-UX operating systems.
  • Administered DNS, NIS, NIS and NFS, Send Mail and involved in troubleshooting.
  • Expertise in Redhat Cluster Server and Zone administration and configuration.
  • Extensive experience in building servers using Jumpstart and Kick-start Process.
  • Expertise in package management using Red Hat RPM, YUM used in several Linux distributions such as Red Hat Enterprise Linux, SUSE Linux Enterprises and Fedora.
  • Administration and troubleshooting HACMP Cluster Environment and Failover and fall back test on mutual takeover and rotating HACMP Environment.
  • Configured GFS Linux and GPFS AIX
  • Disk and File system management through VERITAS Volume Manager, Solaris Volume Manager, Logical Volume manager.
  • Performed Change Management, Problem Management, cloning, Operating system and data backups and recovery Strategies.
  • Configuring handling Samba servers on Linux, Managing file system.
  • Installation, Configuration and Administration of WebSphere and Apache Servers
  • Having production experience supporting and deploying to web application servers such as BEA WebLogic, Red Hat JBoss, Apache ,Tomcat, and Apache HTTPD servers
  • Installed and monitored VMwareVirtual environments with ESX 3.x, ESXi servers Virtual Center 2.X
  • Added Service Groups and resources based on the requirement with appropriate dependencies, documented change design/Architecture diagram of VERITAS Cluster Servers
  • Configured Users Security administration, backup, recovery and maintenance of various activities.
  • Planning and implemented Disaster Recovery sites from the scratch Involved in disaster recovery testing every quarter
  • Interacting with various teams such Oracle database team, and NetBackupteam, ETL team, DB2 team, Filenet Team and other areas to compare errors and discuss their resolution.
  • Experience of Storage Area Network/SAN, EMC Symmetrix/ Clarriion
  • Interaction with vendors for Hardware and software supports
  • Involved in on-call pager rotation for production support.
  • Demonstrated skill in supporting end users and proven ability to plan, organize and work as a member of a technical project team, both in small groups as well as large corporate areas

Environment: AIX 5.3/5.2L, Redhat Linux Enterprise3/4/5, Solaris 9/8, HP-UX 11.0/11i, Sun Fire 4800/3800/V880, IBM RS/6000, pSeries servers.

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