Manager System Administrator

Praveen Kumar

********.****@*****.***

Cell: 570-***-****

Over 10+ years of experience specialized in System Administration, Network Administration and Application Support working on RedHat Linux, SuSE Linux, Ubuntu Linux, IBM AIX, Sun Solaris, HP-UX and Windows environments.

Experience in installation, configuration, backup, recovery, migration and maintenance, Support of RedHat Linux, HP, Solaris and IBM AIX.

Experience in maintaining cluster of JBoss Servers & monitor JBoss performance.

Experience in Package Management using RedHat RPM/YUM and Satellite server.

Kernel upgradation in RedHat, Suse and CentOS servers.

Experience in applying plug-ins for WebSphere Application Server with Apache HTTP Server and IBM HTTP Server.

Proficient in deploying applications in WAR, JAR, and EAR formats and strong working knowledge of Web Sphere Administration Portals/Process Severs.

Worked on OS migrations, upgrade and BIOS and NIC firmware upgrades.

Worked with Database administrators to tune kernel for Oracle installations.

Experience with SAN and NAS configuration and LVMs.

Configuration and administration of Fiber Card Adapter’s and handling of SAN (SAN arrays; HITACHI, EMC).

Installation and upgradation of Packages and Patches configuration mgmt, version control, service pack & reviewing connectivity issue regarding security problem.

Implemented day-to-day tasks in (RedHat /Suse) Linux include upgrading rpms, kernel, and HBA driver; configure SAN Disks, Multipathing and LVM file system.

Experience in Creation and managing user accounts, security, rights, disk space and process monitoring in RedHat, CentOs, Suse and Solaris.

Experience in configuration of NIS, NIS+, LDAP, DNS, DHCP, NFS, LDAP, Automount, SAMBA, Sendmail, FTP, remote access, Active Directory, Security management and Security trouble shooting skills.

Creating and monitoring pools, RAID levels, snapshots and clones using ZFS

Experience in writing shell scripts to automate the tasks and management using cron

Experience on Webservers such as Tomcat 5.x/4.x/3.x & Apache Server 2.x/1.x.

Experience in Installation of Oracle, MS SQLServer and MYSQL.

Experience in VMware ESX Server to build guest OS using cloning.

Worked on HACMP clustering on AIX to provide redundancy in the environment.

Analyze, troubleshooting, and resolve Red Hat Linux and Server HW, Network problems in a DEV, UAT and Production Server environment.

Wrote system design, implementation plans, and updated documentation

Team player with good management, analytical, communication & interpersonal skills

Education: Masters in Computer Science from Herguan University

Professional Experience:

Sr. System Administrator

American Airlines, Ft. Worth, TX - April 2016 - Current

Responsibilities:

Responsible for Day-to-day systems administration tasks in Solaris, Redhat Linux, Suse Linux and AIX servers.

Installed and Configured Solaris 10 by using Jumpstart server (Jet server) and also installed and configured Linux by using Kickstart server.

Involved User Administration (creating user account, password and set the password) on Red hat Linux and Solaris.

Responsible for supporting more than 1000+ Redhat VM’s and patch managements. Supported hundreds of Solaris LDOMS/Zones for hardware and software incidents and engage sun support.

Hand on experience in SSH configuration generating public key and private keys and enabling password less connection between the servers.

Created and expanded File Systems on demand from DBA's using Veritas volume manager and also using native UNIX utilities.

Requested NAS Shares and mounted them on Solaris/Redhat servers. Fixed issues with routes as a part of mounting NAS shares.

Extensively used RPM for installing, uninstalling & upgrading various applications.

Used YUM tool for installing, deleting & managing RHEL RPM software packages.

Troubleshooting System, Network, and Operating System issues.

Experience in Performance tuning and Capacity Planning using native Unix commands and advanced tools like NMON, Sysstat.

Analyzed & did troubleshoot bottlenecks involving Memory, CPU, Devices & Network using ps, vmstat, iostat, netstat, snoop and nfsstat command, tuning the performance.

Creating volume groups, logical volumes, extending logical volumes based on the requirements using Logical Volume Management (LVM) commands.

Did hundreds of Firewall requests as a part of user’s location change and new requests.

Worked with EMC Storage team to get the LUNS and create new file systems.

Monitored system performance using sar, prof, vmstat, iostat, netstat, Nagios.

Tuning the kernel parameters based on the application/database requirement.

Monitoring system resources, logs, disk usage, scheduling backups and restore using Nagios and Veritas NetBackup

Automated tasks using cron for users and editing crontabs.

Created project report and wrote technical document for various projects.

Used Service Now ticketing System for creating tickets to various teams dealing with SAN requests, Stage/Prod Servers.

Escalated high level technical support issues to storage vendor (EMC/SUN) and management.

Environment: RHEL 5/6/7, Solaris 8/9/10, AWS, Puppet, Web sphere 6.1, VCS, VVM, Service Now (Ticket Monitoring Tool), Solaris/VxVM, Ldap, HMC, VMware, RAID, Jumpstart, kick start.

Sr. System Administrator

Citi Bank, Irving, TX - June 2012 – March 2016

Responsibilities:

Installed, upgraded, configured RHEL 5/6/7, CentOS, Sun Solaris 10 and manage SuSE Linux systems.

Worked with installation, configuration, tuning, security, backup, recovery and upgrades of Linux (Red Hat, Ubuntu, and SuSE).

Installed & Updated HMC with corrective service package and the latest maintenance

Migrated applications from AIX systems to RedHat systems.

Creating Backup account for new users, deleting account for the retired/deleted users.

Configuring Physical Volumes, Volume groups, logical volumes and file systems on Red hat, Ubuntu and SuSE Linux.

Troubleshooting and analysis of hardware and software failures for various servers (core dump and log file analysis).

User management via creating and managing users and groups users and groups in Red Hat, Ubuntu and SuSE Linux.

Involved in supporting Cloud Instances running Linux on AWS, experience with Elastic IP, Security Groups and Virtual Private Cloud in AWS.

Configuring SUDO and granting root permission to Backup Admins/DBAs to perform root related activities.

Wrote puppet manifests for deploying, configuring, and managing collected for metric collection & monitoring. Build automatic provisioning system with Kickstart & Puppet.

Configured SSH public & private keys, telnet, login services on Solaris / Linux servers.

Managed public & private keys for SSH login.

Configured system devices, determined hardware compatibility, configured and monitored error logs, installed optional software and service updates.

Configured & supported BIND on Solaris & Linux platform.

Configured and managed Apache Web Server on Linux for web based applications

Coordinating between teams involved in application and infrastructure deployment

Working with vendors (Oracle, IBM & HP) and internal business units to maintain the minimum downtime of the servers.

Troubleshooting Day-to-Day File system, Memory and CPU and other application issues with various Servers on different platforms Unix Platforms.

Installation, configuration, crash recovery, performance tuning & administration of Solaris 9,10.

Environment: RHEL 5/6/7, Solaris 8/9/10, HP-UX 11.11, Puppet, Web sphere 6.1, VCS, VVM, ServiceNow (Ticket Monitoring Tool), Solaris/VxVM, Ldap, HMC, IBM Tivoli Storage Manager 5.4/5.3, NIM, VMware, RAID, Jumpstart, kick start.

System Administrator

Allied Electronics, Ft. Worth, TX - Sep’2011 – May 2012

Responsibilities:

Installed, upgraded and configured RHEL 5/4 and IBM AIX 5/4. This included Kickstart Installation, NIM Installation and CD media.

Installed, configured and administration of Application Server 6.x, Network Deployment, MQ 5.x, 6.0, JBoss 4.x on Linux, AIX.

Modified existing Linux file systems to a Standard EXT3 as well as migrating all Solaris Database files to ZFS to increase system performance.

Installation and configuration of LVM & HACMP on various AIX Servers.

Installation and configuration of Oracle RAC 11g on RedHat Linux cluster nodes.

Worked with Oracle Database Admins and reviewed the required maintenance tasks.

Managed builds and Deployments, Created Ant Scripts to customize EAR, WAR and JAR files and the application is deployed on WebSphere server.

Generated HTTP plug-in config & configured with web servers by doing manual edits.

Management of Linux and AIX user accounts, groups, directories and file permissions.

Configuration of DHCP Server on Linux to get the IP Addresses Dynamically.

Configuration and administration of DNS, LDAP, NFS, NIS, NIS+ and Sendmail in RedHat Linux, IBM AIX and Solaris.

Configured SAMBA to get access of Linux shared resources from Windows.

Day to day Linux and AIX hardware support, problem and change ticket implementations, composing scripts, OS builds & upgrades day-to-day Storage & UNIX.

Configuration of Secured Shell (SSH) in both AIX and Linux servers.

Configuration and Administration of Apache Web Server and SSL.

Creating and managing VM’s through Virtual Centre and VI client.

Reviewed Web Server, Application Server Performance Monitoring data using Tivoli Performance Viewer and reviewed historical Tivoli logs for root cause analysis, recurring events and involved in troubleshooting the recurring problems.

Environment: RHEL 5.x/4.x, and Windows 2003/NT, WebSphere 10.0, Oracle 11g/10g/9i, MS SQL, Logical Volume Manager, Veritas NetBackup, VM ESX 3.x/2.x

System Administrator

Wells Fargo, Charlotte, NC - Jan’2011 –Aug’2011

Responsibilities:

Installation, Upgradation and configuration of RedHat Linux and IBM AIX OS IBM Blade servers and P-Series Servers using Kickstart, NIM and CD media.

Responsible for installation, configuration, support and performance monitoring of high profile applications running on IBM WebSphere Application Servers, WebSphere Process Server and integrate with different Web Servers & configuration of web apps

Upgraded WebSphere ND 6.0 and 6.1 with refresh packs and fix packs. Migrated all the applications on WebSphere 5.1.1.12 to 6.0.2.9 and to 6.1.0.9

Implemented the Clustering Topology that meets High Availability and Failover requirement for performance and functionality.

Installing and configuration and maintenance of Veritas Net Backup 6.0/5.x.

Manage and Wrote HP-UX based test and measurement algorithms, data

acquisition and analysis software, and instrumentation control drivers.

Creation of Logical volumes (LVM) for Red Hat Linux and IBM AIX operating systems.

Installation and customization of Window 2003 servers.

Configuration and Administration of NFS, NIS, NIS+, LDAP, DNS, Samba and Sendmail.

Working knowledge of VMware (Virtualization).

Upgrading VMware server 2.x to 3.x.

Installed RPM packages and LPP on Linux Servers and IBM P-Series AIX Servers.

Written shell scripts to automate the administrative tasks using cron and in AIX / Linux

Validated monitored and analyzed Batch Jobs.

Backup Schedules for Linux Servers using DLT Tape drives.

Logging events and forcing crash dumps, securing servers and troubleshooting issues.

Troubleshooting and resolving of problems related to hardware, operating systems, third party applications and scripts.

Initiating Backups on daily basis and monitoring the scheduled backups.

Provided On call Support for RedHat Linux and IBM AIX server environments.

Environment: RedHat Linux, AIX servers, Veritas Volume Manager, Veritas Net backup, DNS, NIS, NFS, Sendmail, Oracle 10g, MYSQL, Web logic 9.2,Websphere

Systems Administrator

Appirio, Dallas, TX - July’2008 –Dec’2010

Responsibilities:

Installation, Configuration & Migration of Unix/Linux operating systems.

Involved in 24X7 Production support, Build and Migration Assignments.

Worked Primarily on RHEL 4/5,CentOS 5.5 and Solaris 10 Operating Systems.

Troubleshooting and Networking issue after migration.

Installation, configuration and remediation of various Security software’s.

Migrated Oracle RAC servers using system Imager and effectively worked with the database team to bring up/down the databases.

Writing Shell and Perl Scripting for automation of job.

Migration and troubleshooting of Veritas Cluster.

Disk and File system management through Logical Volume Manager including GFS (Global File system)

Analyze User Requirements; propose alternative solution in setting up local area network and maintain existing network up and running.

Ensuring the use of performance data and historical metrics to effectively plan for growth needs, plan upgrades, migrations, and optimizations, new implementations, identify and resolve efficiency issues, and improve functionality.

Configured DNS server and DHCP for the new server builds.

Managed and configured hundreds of servers using Puppet.

Tuning the kernel parameters based on the application/database requirement

Managed Apache for Web hosting Applications.

Configured central logging management using OPEN LDAP.

Environment: Red Hat Linux (RHEL 3/4/5), Solaris 9/10, Logical Volume Manager, Veritas Cluster Server, Global File System, Tivoli Storage Manager 5.x, VMware 2.x, Shell Scripting

UNIX Administrator

Superior Court of Arizona, Phoenix, AZ - June’2007 –June’2008

Responsibilities:

Installed, upgraded, Mirrored and configured RHEL 3.x, IBM AIX 5.1 and Sun Solaris 9.0/8.0 using Kickstart, NIM and Jumpstart Installation respectively.

Installed, configured WebSphere Application Server 6.0, WebSphere Portal Server in a clustered environment

Excellent knowledge of Different Installation processes. Mostly worked on Silent Installation using Response file.

Deployed Themes and Skins on to WebSphere portal server.

Maintenance of the WebSphere servers on different UNIX platforms and setting up the development and testing and staging environment for the ongoing application development

Disk Management using different raid technologies in Solaris, AIX and Linux using VERITAS Volume Manager and LVM.

VERITAS Cluster Installation and Configuration along with Resources and Service Groups Configuration in VCS.

Network trouble shooting using ndd, trace route, netstat, ifconfig and snoop.

Administered and Managed Network Applications and Services like NFS with Hummingbird connectivity V7.1.

Involved in Configuring DHCP server and giving IP addressing dynamically.

FTP Server configuration and done kernel tuning on Linux for play out software

Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software and directories & files using access modes.

Written Shell scripts to run Batch Jobs on AIX servers.

Environment: IBM RS/6000, IBM PSeries, Linux Servers,Veritas volume manager, Veritas Net Backup, Oracle 9i, HP-UX, RedHat Linux 3.x, IBM AIX 5.1, Solaris 9.0/8.0

System Administrator

John Deere Agri Services, Lathrop, CA - Jan ‘2007 - May ‘2007

Responsibilities:

Installation, Upgradation and configuration of RedHat Linux and Windows 2000 servers.

Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software and directories & files.

Managed Virtual Memory and swap space on Linux Servers.

Configuration of DNS, APACHE, MAIL, DHCP & FTP Servers in Solaris.

Written Shell scripts to run Batch Jobs using cron and at.

Implementing Raid levels and changing Boot PROM values according to the requirement.

Configuring modems & printers.

Documenting the configurations, changes made on any part of System and Network.

Involved in Backup of data on DAT tape drive, security, performance and availability of system and network.

Configuring Windows Machines in Work Group Environment

Create system images with Norton ghost.

Environment: RedHat Linux 3.x, Windows 2000/NT 4.0, Apache, IIS 4.0 and Oracle 8i.

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