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Linux Administrator Resume

El Dorado Hills, CA

Professional Summary:

  • Over 8 years of experience in Administration and Development of windows 2003/2008, Red Hat Linux, SUSE Linux.
  • Experienced in Installing, configuring and administering Red Hat Linux AS 3.0 /4.0/5.x &, Dell, IBM and HP x 86 Servers.
  • Design and Implementation of migration strategy for consolidating Data Centers from around the world to two centralized locations in US which involves 6000+ servers of various Windows versions.
  • Identification, planning and migration of P2V candidates and new builds from each sites without any downtime.
  • Consolidation and Capacity planning of Physical Servers using Cirba.
  • Works closely with Network and security team to open the required ports for communication.
  • Experience in TCP/IP Networking.
  • Using Server automation (BladeLogic) too to run the scripts/patches in multiple servers.
  • Experience in Monitoring and work on the alerts.
  • Knowledge in XML schema.
  • Creating and managing Virtual Machines and Templates, worked with clones and snapshots of Virtual Machines.
  • Knowledge in Component Object Model (COM) and Distributed Component Object Model (DCOM)
  • Automating and building the Windows 2k3 and 2k8 servers using BMC Blade Logic Automation tools.
  • Using robocopy, and Plate Spin to copy data from source to target over the lan..
  • Experience in transformation and remediation process.
  • Involved in installation, configuration and testing of Double-Take Share for Data Transfer for Solaris and AIX Servers.
  • Troubleshooting, documenting and knowledge transferring of Double Take process to the BUs.
  • Involved in migration of project from one flavor to another one.
  • Knowledge in IIS6 & IIS7 administration.
  • Strong Experience on Migrating from Windows 2000/2003 – 2008 using Double-Take Availability.
  • Works closely with Java Team to Deploy the application and trouble shoot.
  • Worked in heterogeneous environment. Installing, configuring and administration on IBM AIX 5/6/7, Red Hat Linux 8, 9 and RH AS 2.1, RHEL 3.x, 4.x, Suse Linux Enterprise Server (SLES) 10.x.
  • Implemented and Enhanced the Existing Scripts which are developed in Shell, Perl, and SQL.
  • Worked with Backup Team to Configure the Master and Client Backup servers Using VERITAS Net Back up 4.5/5.0
  • Performed Servers consolidation and virtualization using VMware virtual infrastructure, VMware ESX, Virtual Center, VM tools.
  • Experience in virtual infrastructure and Enterprise Cloud technologies
  • Configuring Kickstart Servers and booting the images using PXE in Red hat Linux (RHEL).
  • Installed OS by using Kickstart, NIM and Ignite methods.
  • Extensive experience in installing, integrating, tuning, and troubleshooting Apache, Tomcat and WebSphere application server and webserver, webfocus IHS Also involved in troubleshooting.
  • Good understanding of testing cycles.
  • Worked closely on UVT, AVT& IVT Testing’s.
  • Knowledge of testing components and deliverables within the Software Development Life Cycle (SDLC)
  • Experience in Windows file/print servers, Windows clustering, Symantec Enterprise Vault, NetBackup & VMWare. This is primarily a Windows Administrator with working knowledge of Netback up, VMware.
  • Expertise in Volume management, Disk Management, software RAID solutions File system Tuning and growing.
  • Experience with creation and administration of virtual machines on VMWare ESXi and Infrastructure 3.
  • Experienced with the installation, configuration of LVM on AIX and Logical Volume Manager (LVM) on Linux and experienced in RAID 1, 5, 51, 10, 01 configuration.
  • Knowledge of “JON” – JBoss Operations Network
  • Experienced in installation and configuration of SAMBA.
  • Experience in SQL Server 2002/2005/2008 in Installation and Configuration.
  • Good experience and understanding of SAN (SAN arrays; HITACHI, EMC) technology including zoning, disk creation on various systems, maintaining and configuring various fiber switches and storages.
  • Experience with Methodologies of Agile & Scrum.
  • Experience in network administration, deploying and troubleshooting of DNS, LDAP, NIS, NFS and DHCP etc.
  • Expertise in System performance tuning, capacity planning and Disaster Recovery planning.
  • Experience with patching of Linux and IBM AIX servers and hardening of servers using native and third party tools.
  • Disk and File system management through Logical Volume Manager (LVM) on IBM AIX & LINUX.
  • Knowledge of networking (TCP/IP, Ethernet), NIS, DNS, NFS, DHCP, SMTP and RAID.
  • Knowledge of Routers and Switches, Subnet, VLAN, TCP/IP, VPN, OSI model, Firewall (checkpoint), VOIP, and Sarbanes Oxley compliance (SOX).
  • Extensive experience in programming with C, C++, Device driver, Application Services on UNIX, Windows Host.
  • Scripting knowledge (Perl and C) to perform different administration tasks.
  • Experience in Shell scripting (ksh, bash) to automate system administration jobs
  • Extensive experience in UNIX performance monitoring and kernel tuning and Load balancing to ensure stable performance.
  • Good knowledge in virtualization using VMWAARE ESX 3.5, 4.0 for redhat Linux and Solaris x 86 platforms.
  • Proficient in Installation, configuration, maintenance of open LDAP server and applications integrated with Apache Web server and Postfix mail server for user authentication.
  • Strong technical background in Storage, Disk Management, Logical Volume Management (LVM) and logical partitioning.
  • Configured DNS, LDAP, I-planet, Apache HTTP servers.
  • Good Knowledge in virtualization using WPARS & LPARS on IBM Power environment.
  • Excellent communication skills, enthusiastic with the drive and determination to do whatever it takes to get the job done.

Technical Skills:

Operating Systems: Linux (Red Hat & SUSE), HP-UX 11.0, 11.11, 11.23, 11.31, IBM AIX (4.3/5.x/6.x/7), SLES 8,9,10 & 11, Windows NT /2003/2008.

Hardware: HP Proliant DL 380, 580, 480 G4, G5, G6 &G7 servers, HP Blade Enclosures C7000 & C6000, IBM P550, 650, 660, Dell PowerEdge 2800,r310, r410, r710, Intel Servers, Extreme network and Cisco switches, Brocade Switches, A1000, A5200, 3510, 3511, D1000, Sun Store Edge T3, 9980

Networking: TCP/IP, NIS, NFS, DNS, DHCP, Cisco Routers/Switches, WAN, SMTP, LAN, FTP/TFTP.

WEB Technologies: Tomcat, APACHE 2.x, 3.x, Web Logic (8/9/10) & Web Sphere 4.0/5.0,IIS6.0/7.0, C, UNIX Shell Scripting, Perl Scripting, HTML, Perl, VB.

Programming Languages: C, UNIX Shell Scripting, Perl Scripting, HTML, Perl, VB

Backup Management: 4.x/5.x/6.x, Ufsdump, Ufsrestore, tar, cpio, dd, Tivoli,

Third Party Software: VERITAS Volume Manager, EMC Storage, RAID Technologies, SSL, Double-Take, BMC Blade Logic.

Protocols: TCP/IP,UDP RIP, OSPF, EIGRP, IGRP, SNMP, SMTP, TELNET

Professional Experience:

Confidential, El Dorado Hills, CA

Linux Administrator

Responsibilities:
  • Worked on variety of Linux platforms Red Hat Linux, AIX, Solaris which includes installation, configuring and maintenance of applications on this environment.
  • Works with Symantec and BSC team to setup the Symantec O3 IDLINK Open VPN Servers.
  • Working on Active directory services & GPO’s on Windows 2008R2 & Windows 2003
  • Windows Server 2008 Hyper-V virtualization configuration for servers.
  • Network and Internet support for managed web hosting in Windows 2008 R2 environment
  • Troubleshooting network administration, IIS configuration, DNS setup and modifications, firewall rule sets, local and distributed director, connectivity, and supporting applications
  • Responsible for independent support of Tier 2 issues: reboots, start/stop services, reset Terminal Service and pc anywhere connections, and administrative server maintenance. Daily follow up with clients to ensure resolution of all issues.
  • Provide support to Account Managers, UNIX and Windows technicians, and other departments
  • Build servers using Kick Start, Red Hat Satellite Server, and vSphere Client
  • Updating patches to keep servers updated against bugs present in the operating system using Red Hat Satellite Server, yum, etc.
  • Worked exclusively on VMware virtual environment.
  • Experience in using VMware veeam to move VM’s from One Datacenter to another datacenter.
  • Involved in installation and configuration of various Third party software onto servers.
  • Involved in ILMT Agent Deployments and Oracle/SQL Upgrade project which includes various Unix builds of different OS platforms across various data centers.
  • Co-ordinated with various cross functional teams across IT operations to make sure smooth functioning of projects.
  • Worked closely with DBA Team in order to adjust kernel parameters as per requirements.
  • Installed, configured and provided support for Tivoli Monitoring software across various OS platforms like RHEL,AIX and Solaris.
  • Installed, configured and provided support for Tivoli Net Backup software across various OS platforms like RHEL,AIX and Solaris
  • Installed packages using YUM and Red hat Package Manager ( RPM ) on various servers
  • Day to day resolution on Linux based issued though SMS ticketing system in compliance to SLA cycles.
  • Automating many day to day tasks through Bash scripting.
  • Worked with Red Hat Satellite Server which is used to push changes across various servers simultaneously.
  • Performed the daily system administration tasks like managing system resources and end users support operations and security.

Environment: Red hat Enterprise Linux 4.x/5.x/6.1, AIX 6.x, Solaris 8/ 9/10, Tivoli Storage Manager, VMware ESX5, Tivoli Net backup, and Web sphere. Windows 2008 R2 & 2008 servers, Windows 2003, IIS 7.0 & 7.5

Confidential, Fort Worth, TX

Systems Migration Engineer (Windows/Linux)

Responsibilities:
  • Installation and Administration of Redhat & SUSE Linux on x86 Enterprise Servers for test lab, production and disaster recovery setup.
  • Installation, configuration and testing of Double-Take Share for Data Transfer for Solaris and AIX Servers.
  • Implementation of VMware Infrastructure for Windows, SLES 11 & Linux Red hat 5.0 with VMware ESX 3.5, Virtual Center 2.5 and administered the VMs with VI client.
  • Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat and Web Sphere application server and Web sphere IHS including troubleshooting.
  • Used Logical Volume Manager for the management of Volumes including creation of physical and logical volumes on Linux
  • Experience in supporting Windows Cluster server running 2-4 nodes on Windows 2000,2003 and 2008 supporting applications like web servers, SharePoint and Active Directory environment.
  • Strong Experience on Migrating from Windows 2000/2003 – 2008 using Double-Take Availability.
  • Involved in migration of project from one flavor to another one.
  • Using blade logic automation tool to add and remove the AIG Standard’s stack.
  • Implementation of Windows 2003/2008 domain architecture.
  • Installation and configured SLES 9, 10 &11, Red hat 4.x, 5 on Dell Power Edge Blade servers using Kickstart with PXE for LAMP (Linux, Apache, MySQL and Perl/PHP) installations.
  • Migration of applications from Linux (Redhat & SUSE) to Windows2003/2008 and resolving any dependency issues after live upgrade.
  • Worked on User administration setup, maintaining account, Monitor system performance.
  • Activities includes user administration; startup and shutdown scripts; crontabs, file system maintenance, backup scripting and automation using Perl, shell scripting (bash, ksh) for Red Hat Linux and AIX systems.
  • Performed application installation and management on IBM AIX and Linux servers for applications like Web Sphere Application Server (WAS) 7, JBoss 4.2.x, 5.x, Sun JES Web Server 6.1, Oracle 10g, Sybase 12.5 etc.
  • Adding patches to keep the servers updated against bugs present in the operating system as well as other applications like VERITAS Storage Foundation, Web Sphere and Oracle.
  • Implemented and administered VMware ESX 3.5, 4.x for running the Windows 2003/2008 Servers on development and test servers.
  • Worked extensively with Active Directory Services, Web Services(IIS Servers), DNS, DHPCP, SQL Database Servers and Business Application Servers
  • Install and configure SSH to enable secure access to the servers.
  • Modified the Linux kernel to add tracing probes for Config access tool.
  • Developed a tool for logging the Process creation and exit as well as file creation and exit.
  • The following information about a process has been logged from the kernel data structures.
  • Worked on user management and groups, worked on creating the users policy on the ACX end point.
  • Environment, Command line, Current working directory, root directory, executed command.
  • Expertise in installation, configuration and administration of Windows 2000/2003/2008 servers, Active Directory and exchange server.
  • Creating User Accounts and Groups in Active Directory
  • Installing and Configuring Windows 2003/2008 Servers.
  • Remote Desktop Monitoring using Microsoft Terminal Services/Client.
  • Interacting with all the team members both in offshore as well as with the client in maintaining good customer relationships

Environment: Red hat EL 4.x, 5.x, Windows Server 2000/2003/2008 ,Double-Take,BMC BladeLogic, Web Sphere Application Server 10, JBoss 4.2.x, 5.x, Sun JES Web Server 6.1,Sql, Oracle 10g, Sybase 12.5, Stellent 7.5.1, Samba 3.3.x, EMC Symmetrix DMX-3.

Confidential, NH

Linux Engineer

Responsibilities:
  • Administration and support of Unix Servers including SUSE, IBM AIX & Red Hat Linux and CentOS.
  • Creation of VMs for SUSE, Solaris x86 and Redhat Linux on VMWare ESX 3.5 and administering them with VI Client.
  • Performed volume management using SVM and LVM and the creation of zfs, VxFS, UFS and ext3 file systems.
  • Installation and support of various applications including WebLogic 10, JBoss 4.2.x, Oracle 10g, Sun Java System Web Server 7, Tomcat, JDK 1.5, Ant.
  • Updating the Windows 2003/2008 patches.
  • Created and Maintained User Profiles for all new users via Windows NT/2000 Server User Manager for Domains
  • Installation, configuration & administration of Windows 2000/2003 Server, IIS-5.0, Active Directory & Exchange 2003 Server.
  • Managing, Supporting and troubleshooting with remote as well onsite support for Customers to resolve server
  • Provisioning of LUNs from SAN based on McData Switches and Hitachi Based Storage.
  • Patch management using native commands on AIX and Linux and following the chance control procedures.
  • Performance tuning and troubleshooting of the applications and resolution of issues arising out of the ticketing systems in Remedy.
  • Monitoring the servers using tools like BMC and Nagios and providing 24x7 support on call rotation basis.
  • Modified the Linux Kernel (2.4) to control the swappiness.
  • Decommission of the servers/service groups which include: removal of DNS, take full ad-hoc backup of file systems, removal from backups, removal of patrol monitoring, removal from AD, keep autosys jobs ON-ICE, removal from CME etc.
  • User administration of UNIX / Linux account using SeOS and also used sudo / RBAC for assigning special privileges to the users.
  • Worked on Remedy project and resolved Remedy tickets as assigned to the individual or team
  • Participated in projects as directed including planning and the implementation of new applications and projects infrastructure.
  • Involved in migration of project from one flavor to another one.
  • Involved in development, user acceptance, and performance testing, production & disaster recovery server.
  • Extensive experience in programming with C, C++, Device driver, Application Services on UNIX, Windows Host.
  • Strong scripting knowledge (Perl and C) to perform different administration tasks.
  • Experience in Shell scripting (ksh, bash) to automate system administration jobs
  • Automated tasks using bash, korn shell scripts.
  • Backup and restore of file systems using Veritas Netbackup 6.5.

Environment: SUSE 9,10, Solaris 8, 9, 10, Redhat EL 3, 4.x,VM Ware ESX 3.5, Virtual Center 2.5, BMC Patrol for Unix, Apache 2.2.x, Sun Java System Web Server 7, WebLogic 10, ksh, bash, Oracle 10g, Sun SPARC Enterprise T2000, T5120, Sun Fire v890, 6800, x4100, x4150, E6900, M5000, M 8000, 3510, 3511, Hitachi Lightening 9970v

Confidential, Dallas, TX

Linux Administrator

Responsibilities:
  • Installation of Oracle 10g on the Sun servers running Solaris 8, 9, SuSe Linux ES 10 and Redhat AS 2.1, EL 3 and 4.x.
  • Experience on working with a SAN environment which included working with SAN teams and the environment included Brocade Silkworm 4900 switches, EMC Symmetrix DMX 4 and Sun StorEdge 9980
  • Installing and upgrading Solaris 8, 9, 10, IBM AIX 5.x/6.x, Redhat EL 3, 4.x and Suse EL Server 10 sp1, sp2 operating systems.
  • Involved in building AIX servers using NIM server on various IBM Power servers and Kickstarting Redhat EL 3, 4.x, 5.x
  • Creating resource pools, zones and containers on Solaris 10 and v490s, v890s to optimize and consolidate the use of the hardware.
  • Worked on LDOMs on Sun T2000 servers.
  • Worked on LAMP for configuring Mantis Bug tracking tool and Wordpress blog software.
  • Installing Veritas Volume Manager 4.1. Implementing RAID and creating Disk Groups, Volume and Logical volumes using VxVM on Solaris to manage the storage resources and creating, resizing and managing volumes and used LVM on IBM AIX, Linux to create Volumes on the Volume Groups, Volumes and file systems.
  • Mirroring the root disks using Sun Volume Manager.
  • Installed and Configured High Availability, Disaster Recovery systems using Veritas Cluster Server 4.1 on a two node cluster for NFS and MQSeries.
  • Configuring, administering and troubleshooting of NFS, NIS (master, slave and client) and DNS (Bind 8.2.x and 8.3.x) in multi-platform networks that included IBMA IX & Linux.
  • Updating patches to keep the IBM AIX, Linux and Solaris servers updated against bugs present in the operating system using patch administration commands like swlist, swinstall, patchadd, showrev, yum, up2date etc.
  • User, Group management and security policy management for the all servers including Windows and UNIX using RBAC, sudo etc.
  • Installing, configuring and troubleshooting Sun Java System Web Server 6.x, 7 and Apache 2.2.x web server on IBM AIX.
  • Responsible for Installation, configuration and administration of middleware like WebLogic 9.0, JBoss 3.2, CA Web Access Manager (WAM) and MQ Series v 7.0 etc.
  • Performance Analysis of resources like CPU, Memory, Disk and Swap from command line using commands like prstat, vmstat, sar, iostat, swap etc. and tuning of the kernel parameters for the better performance of the operating system and TCP.
  • Hardening the servers as per the compliance norms by analyzing the availability of the services that are needed on the servers based on the functionality and disabling the services which are not needed. Installation and configuration of TCP wrappers and constant security patch updates as a part of the exercise to harden the servers.
  • Was involved in creation of a Project plan and the implementation of a backup solution using Veritas NetBackup 5 and StorageTek L700 tape libraries.
  • Deployment of System 5 packages on production servers.
  • Modifying/ Writing scripts for day-to-day job and administration.
  • Creating test environment and assisting in Change control management.
  • Troubleshooting day-to-day server related issues and problems.

Environment: Redhat 8, 9, AS 2.1, EL 3, 4.x, SLES 10 sp1, sp2, IBM AIX 4/5/6, Veritas Volume Manager 4.1, Veritas Cluster Server 4.1, Veritas Netbackup 5, BMC Patrol for Unix, Apache 2.2.x, Sun Java System Web Server 6.x, 7, WebLogic 8.x, 9.0, JBoss 3.2, MQ Series 7.0, CA WAM, System 5 Packaging, Perl, Oracle 10g, v880, v490, v890, 6800, x2100, x4200, SunFire T2000, M5000, M 8000, Brocade Silkworm 4900 switches, EMC Symmetrix DMX 4, Sun StorEdge 9980, StorageTek L700

Confidential, Portland, OR

System Administrator

Responsibilities:
  • Installing, configuring and updating Redhat Linux and IBM AIX 4/5 systems.
  • Designing System Requirements, Designing Storage requirements, Configuration Management/Change control/Release management.
  • Installing Veritas Volume Manager 4.0 and configuring Disk Groups, Volume Groups and Logical volumes to manage the storage resources.
  • Creating, Resizing and managing online JFS Filesystem for users upon user request using Veritas Volume manager and LVM.
  • Patch and Package administration to keep the servers updated with the patches and that implementing packages developed for deployment.
  • Installed and Configured SSH for secured access on IBM AIX and Redhat LinuxSystems.
  • Installing and Configuring HP-OMNIBACK 4.10 for Backup of more than 30 Servers.
  • Installing, configuring various software applications and packages like Apache 1.3.18, WebLogic 7.x, Oracle 9i etc.
  • Implementing NIS and DNS naming services and administering the public DNS servers.
  • Monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
  • Troubleshooting and analysis of hardware and software failures for various Linux and AIX servers ( core dump and log file analysis )
  • Tuning the Kernel parameters for the better performance of applications like Oracle, WebLogic etc.
  • Modifying/ Writing scripts using sh, ksh and bash for day-to-day administration.
  • Creating, Deleting and managing user database and their respective directories.
  • Performing backups of Production, DIT and Development servers and applying required patches.
  • Setting up cron jobs for the user to deploy scripts on production servers.
  • Implementing RAID technologies and SAN solutions. Was involved in the configuration of a SAN with McData Switches and Hitachi Data Systems (HDS).
  • Troubleshooting day-to-day server related issues and problems in terms of hardware, operating system, applications and network.
  • Worked on User administration setup, maintaining account, Monitor system performance.
  • Environment, Command line, Current working directory, root directory, executed command.
  • Extensive user and group management through admin tool.
  • Strong scripting knowledge to perform different administration tasks.
  • Experience in Shell scripting (ksh, bash) to automate system administration jobs
  • Mentoring junior team members to support production web environment.

Environment: Solaris 7, 8, 9, IBM AIX 4/5, Windows 2000, NFS, LVM, Veritas Volume Manager 4.0, HP-Omni back, DHCP, DNS, SMTP, SSH2, Apache 2.0, System 5 Packaging, Perl, Oracle 9i, 280R, E5500, 6500, K580

Confidential

Systems Administrator (Unix)

Responsibilities:
  • Configured firewall based on Redhat Linux and FreeBSD 4.x that has three network interfaces.
  • Implemented a High Availability Cluster using 2 V480s, a T3 and Veritas Cluster Server 4.0.
  • Installation, Maintenance, Administration and troubleshooting of IBM AIX 4/5 and Redhat 9, AS 3.0 servers on various hardware platforms that include IBM Power servers & Dell 6400, 2400, 1800 etc.
  • Performed automated installations of Operating System using NIM for AIX and Kickstart for Linux.
  • Extensively worked on hard disk mirroring and stripe with parity using RAID controllers
  • Developed, customized and build packages on IBM AIX and RPMs on Linux for deployment on various servers through Software Development Life Cycle.
  • Designed bash, ksh, and Perl scripts to automate application and system management activities. These scripts provided the following functionality: application startup and shutdown, monitored systems and applications health, and web site management
  • Installation, Management, Configuration of LAN/WAN systems utilizing Cisco switches and routers.
  • Configured various services, devices as well as applications of UNIX servers and worked with application team to customize the environment. Worked with Apache and developed several UNIX scripts to automate web tasks
  • Managed existing documentation for systems and created new procedures to support new products. Created documentation for disaster recovery project

Environment: IBM AIX 4/5, Redhat Linux 9, AS 3.0, Veritas Volume Manager 3.x, 4.0, Veritas Cluster Server 4.1, Cisco Routers, Sun 4800, V480, 280R, 4500, 3500, Dell 6400, 2400, 1800 Redhat 8, 9

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