PROFESSIONAL SUMMARY:

• Around 8 years of specialized experience in System Administration, Network Administration and Application Support working on Red Hat Linux 4.x/5.x/6.x, CentOS 4.x/5.x/6.x, SUSE Linux 10 and Sun Solaris 8/9/10.
• Configuration of LVM (Logical Volume Manager) to manage volume group, logical and physical partitions and importing new physical volumes.
• Experienced in kick - start installations, support, configuration and maintenance of Red Hat Linux, CentOS and SUSE Linux.
• Experience in setting up a PXE boot environment with Red Hat Linux.
• Worked with VMware ESX 2.x /3.x/4.x/5.x servers, and Virtual Infrastructure client to create virtual guests.
• Experience in File systems, File Permissions, Exporting & Mounting File Systems, Recovering File system Errors and Device Path Management.
• Experienced in Installation of Operating Systems, Packages and Patches, adding peripherals, maintaining user accounts, System Security maintenance, backup/recovery, performance tuning, troubleshooting at various levels etc.
• Experience in networking concepts like DHCP, TCP/IP, IP Addressing, Bonding and Networking Technologies.
• Experienced in using monitoring tools like Nagios, webmin.
• Network trouble shooting using ‘ndd’, 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX/Linux environments using shell scripting and CRON.
• Experienced with the installation and configuration on Apache 2.x, 1.3.x, 1.2, JBoss4.0.x, ATG Web Servers and BEA Web logic 8.x, 9.x servers.
• Expertise in configuration and pre-installation tasks of RDBMS Installation including Oracle rac,10g,9i on IBM AIX and Red Hat Linux and MYSQL on Linux
• Experience in Installation & Configuration of Network Print Servers on Red Hat Linux.
• Configured services like DNS, NIS, NFS, Send Mail, FTP, Remote access on Red Hat Linux.
• Responsible for setting up disaster recovery environment for Red Hat Linux servers and implemented all the DR procedures as per the guidelines.
• Responsible for reviewing and providing technical support for technical documentation of UNIX server builds and disaster recovery operations.
• Good experience in Storage Area Network (SAN),NAS, Experience inMulti-pathing.
• Work experience with RHEL, IP Tables, Routing, and VLAN Management.
• Possess strong analytical and troubleshooting capabilities, proactive listener and team player with positive approach and excellent grasping power.
• Experience in leading/working with a team, onsite-offshore models and independent environment. Very good coordinating experience with program managers, testing teams, database administrators and end users.

TECHNICAL SKILLS:

Operating System: RHEL 3/4/5/6, Solaris 10/9/8, HP-UX (11.0.11.11, 11.23, 11.31), IBM AIX (5.1, 5.3), Windows NT 4.0/2000/2003/2008/ XP, VMware ESX 3.x, 4.x, 5.x

Hardware: Sun Enterprise E 5000/5500/4500/450/420 R/250/6500,Sun Fire 280R/V 480/ 3800/4800/6800, E10K/15 Series server, TSeries, MSeries Servers, HP-9000, rx8640, rp7420, rp8420, N-Class, L-Class, D-Class, K-Class, IBM e-Server Regatta P690, P570, RS6000, IBM/HP/DELL Blade Servers, SAN, NAS Storage Box, SAN switch etc. DELL PowerEdge (1650, 2850, 2950, 6400)

Storage: SAN, NAS, DAS EMC Storage, HP and IBM Storage, HDS

Third Party Tools: VERITAS Volume Manager, Logical Volume Manager, RAID, VERITAS Cluster, Sun Cluster, HP Service Guard, Red hat Cluster SAR, LVM, FTP, SSL, VMware virtualization, VMware ESX, RAID Technologies.

Web /Application Server: Apache, iPlanet 4x/5x. Web sphere Application Server (WAS)3.5,4.0, IBM HTTP Server, HTML, DHTML, XML

Network/Naming Services: NIS, NFS, AutoFS, DNS, DHCP, NIS+, LDAP

Database: Oracle (9i, 10g, 11g) with RAC and Data guard, DB2/UDB 7/8.

PROFESSIONAL EXPERIENCE:

Confidential, NYC

Linux System Administrator

Responsibilities:

• Installed/configured/managed/Administrated all UNIX/LINUX servers, including the design and selection of relevant hardware to support the installation/upgrades of Red Hat (5/6), CentOS 5/6, SUSE Linux 9/10.
• Adding new volume groups, extending volume groups/LVM/file system, exporting and importing volume group for hardware migration.
• Performed kick-start installations, support, configuration and maintenance of Red Hat Linux, CentOS and SUSE Linux.
• Installed VMware ESX 2.x /3.x/4.x/5.x servers, and Virtual Infrastructure client to create virtual guests.
• Performed daily housekeeping functions, such as establishing new accounts, creating and resetting passwords, developing, scripts, performing system backups and recovery and installing software patches and updates.
• Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, FTP, TCP/IP Applications and print servers to insure optimal networking and printing functionality.
• Support for Linux/Unix systems administration, operational support and problem resolution for server systems.
• Created shared NFS files system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting & Stopping the NFS services.
• Installation and Configuration of Device Map Multipathing for redundant storage channels for high availability of Storage.
• Installation and Configuration of Network bonding - for high available network.
• Performed Building up of servers, deployment activities, and environment support including installation, configuration diagnostics, planning and upgrades.
• Responsible for design and implementation of IT infrastructure such as data center, servers, storage, backup, and virtualization.
• Responsible for Installation, configuration, Maintenance, Deployments, Update, Monitoring and performance tuning on Linux.
• Experienced in monitoring and debugging performance issues on different OS Linux (RHEL & Centos).
• Systems log management, Data backup and restoration with UNIX native tools (tar/dd).
• Managed DNS server. Updated forward and reverse lookup files for all the new machines added in the domain. Created reverse lookup files for the new subnets added into the network.
• Configured and managed LVM on Linux using tools like lvextend, lvcreate, resize2fs etc.
• Developed Cron jobs and Shell Scripts (Shell) for automating administration tasks like file system management, process management, backup and restore.
• Worked on FTP servers for sending and receiving files between local and remote servers.
• Package management with yum and rpm.

Environment: HP proliant 486 and 586; Linux(Red Hat); XEN virtualization and VMware ESXi4 and vSphere 4 virtual data center with vCenter Server; Web logic, Apache reverse proxy, haproxy load balancing; IBM SAN and EMC Clarion storage; Oracle(standalone and RAC) database.

Confidential, Phoenix, AZ

Linux Administrator

Responsibilities:

• Installation and configuration of Red Hat Enterprise Linux (RHEL) 5x, 6x Servers on HP, Dell Hardware and VMware virtual Environment.
• Worked with Red Hat Satellite server to deploy Linux servers.
• Working with network team to setup Network to Linux Environment.
• Configuring and maintaining virtual server Environment using VMWARE ESX/ESXi, VSphere, VCenter.
• Create, Manage and configure virtual machine VMs on VMware platform.
• Experience in creating new virtual machine VMs via clone using existing VMs with guest operating system templates.
• Worked with backup team to backup Linux servers using NetBackup.
• 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 Servers.
• Worked on Linux network (TCP) performance tuning with system control to increase the network performance.
• Installation and configuration of Nagios on servers used for Network and performance monitoring.
• Worked with Red Hat Package Manager (RPM) and YUM.
• 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 Red Hat clusters for DB2 database..
• 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.
• Provided 24/7 level4 Linux on call production support on rotation basis. Responsible for maintaining security on Red Hat Linux.

Environment: Red Hat Enterprise Linux(RHEL) 5x/6x, Oracle Enterprise Linux (OEL), VMware ESX, VCenter, VSphere, VMware converter,P2V, V2V, NetBackup, Oracle, DB2, MySQL, DNS, SFTP, Apache, Tomcat, Web Sphere, NFS, NAS, RPM, YUM, LDAP, Active Directory, Red Hat Cluster, Red Hat Satellite server, Puppet, Nagios, Cloud, BASH Scripting.

Confidential

Linux Administrator

Responsibilities:

• Installing, troubleshooting and supporting heterogeneous Environment (Windows and Red Hat Linux)
• Created logical volumes for various applications and Oracle.
• Configuration of LVM (Logical Volume Manager) to manage volume group, logical and physical partitions and importing new physical volumes.
• Troubleshoot application performance problem, network issues and recovered systems from crashes.
• Installation of Oracle Patches and Troubleshooting, Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.
• Installation and configuration of Apache web server.
• Administered Windows 2003 server: - Configured AD Domain Services roles; configured network infrastructure roles; configured file and print services; configured IIS7 on Server Core, Added and removed server roles and features.
• Added backup features and used unattend.xml files to automate Windows Server 2003 setup.
• Performed unattended domain controller installation.
• Configuration of RAID 0, 1,01,10,50 for backup and recovery.
• Updating Patches in the Systems as per the requirement.
• Responsible for supporting Sun servers for production, development and testing.
• Installing, Configuring and Maintaining the DHCP, DNS, NFS, NIS, send mail server.
• User Account Management, Group Account Management, configuring dumb terminals, adding modems, formatting and partitioning disks, manipulating swap, local and remote printer management, taking and restoring backup, scheduling jobs.
• Performance tuning and preventive maintenance. Performed daily backup.
• Performed installation and configuration of LDAP.
• Resolving TCP/IP network access problems for the clients. Implementing Remote System Monitoring with Sun Microsystems.
• Develop, Maintain, update various scripts for services (start, stop, restart, recycle, Cron jobs) UNIX based shell.
• Experience with OS upgrades and installation of third party software, packages and patches.
• Scheduling full and incremental backups using Net Backup on daily, weekly and monthly basis.
• Experience with adding and configuring devices like Hard disks and Backup devices etc.

Environment: Red Hat Linux, Windows server 2003, DNS, DHCP, NFS, SAMBA, Apache, SMTP.

Confidential

Linux Admin

Responsibilities:

• Monitoring and Resolving problems relating to Internet Servers, Services, Databases, Helpdesk queries (Level 2) and interacting with other Internet nodes to resolve issues regarding Internet services, etc.
• System & Network Administration of large group of systems & network SUN, Linux, Windows Servers, Modems, Routers and Switches.
• System Monitoring (Heavy Disk I/Os, CPU Utilization of each server, Load on each server.
• Share folders and assign permissions to those shares, assigning and managing disk quotas.
• Setting up and sharing the network printer, planning and scheduling backups.
• Antivirus installation on servers and nodes. Also includes updating and installing patches on servers
• Implementing, Managing and Troubleshooting hardware devices and drivers, installing service pack and updating drivers.
• Configuring and Administration of users, groups, Creation/Deletion, Monitoring Mail Queues, File systems, network printer & device drivers.
• Administration, Monitoring, Disk space Management, Ensuring Data security and Access control on Servers
• Managing user Rights, Maintaining data and access security Assigning mail Quotas, Writing Scripts, LVM, and RAID.
• Monitoring Send mail, Postfix, NFS, NIS and DNS Servers.
• Installation of patches and packages using RPM and YUM in Red hat Linux.
• Created and modified application related objects, created Profiles, users, roles and maintained system security.
• Responsible for setting up cron jobs scripts on production servers.
• Installed and configured SAMBA server for Windows and Linux connectivity.
• Monitored System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Responsible for writing/modifying scripts using sh, ksh, and bash for day-to-day administration.
• Modified Kernel parameters to improve the server performance in Linux.
• Creation of Logical volumes (LVM) for Linux operating systems.
• Installed and configured Apache / Tomcat web server.
• Involved in design, configuration, installation, implementation, management, maintain and support for the Corporate Linux servers RHEL 4x, 5.x, SLES 9, CENTOS 5.x.
• Coordinating with 24 x 7 on-call support personnel in debugging.
• Maintained proper documentation of all the activities carried out during the project
• Worked with DBA team for database performance issues, network related issues on Linux Servers.
• Maintained proper documentation of all the activities carried out during the project.
• Created and modified users and groups with SUDO permission.
• Installed and configured VNC server/client.
• Coordinating users for any server activities which may involve major changes on software or any hardware related issues.

Environment: Red Hat Linux (RHEL 4/5), Logical Volume Manager, Global File System, Red Hat Cluster Servers, VERITAS Clusters, VERITAS Volume Manager, VMware, Oracle, MySQL, DNS, NIS, NFS, Apache, Tomcat.