PROFESSIONAL SUMMARY:

• Worked as a system administrator around 7 years of experience on RedHat - Linux ( 4x, 5x & 6x),CentOS (3x, 4x, 5x & 6x), Ubuntu (6x, 7x, 8x, 9x & 10x), SuSE Linux (9x, 10x & 11x),AIX (V5.3 & 6.1), and Windows Environment.
• Worked with installation, configuration, tuning, security, backup, recovery and upgrades of Linux (Red Hat, Centos, Ubuntu, SuSE& AIX).
• Earned enough experience in patching Linux servers to latest versions, and installing RPM packages using Satellite server, Yum Server and up2date Command line.
• Excelled in installing & Configuring LDAP (Server & Client), creating admin, migrating users to LDAP server and configuring database to LDAP server.
• Specialized in creating and configuring RAID in Redhat-Linux while Implementing Disk Quotas and Managing ACLs per user and groups as per company requirement.
• Expert in Kickstart, NIM, Jumpstart, Ignite, AutoYast installation methods.
• Extensive knowledge in JBOSS installation and configuration.
• Extensive experience in installing, maintaining, and troubleshooting JBOSS in Linux/Unix, Weblogic Apache, Nagios and security software's.
• Strong knowledge in implementing Active Memory Sharing and its Expansion for enhanced system performance.
• Expert in user management via creating and managing users and groups users and groups in RedHat, Centos,Ubuntu, SuSE and AIX Linux.
• Specialized in Configuring Physical Volumes, Volume groups, logical volumes and file systems on Redhat, Centos, Ubuntu, SuSE and AIX linux.
• Expertise in Adding and Migrating Physical volumes, Importing and Exporting volume groups,Paging space and Mirroring using LVM and VERITAS Volume Manager.
• Installed and configured network based services such as NIS, NFS, DHCP, DNS, FTP, SFTP, SSH. RSH,Samba& Send mail.
• Worked with product deployment in servers, mail servers, monitoring tools & shell scripts,networking, SQL/MySQL.
• Extensive experience on performance monitoring tools like Vmstat, Iostat, SAR, Nmon, and Topas.
• Strong analytical plus extensive troubleshooting capabilities.
• Experienced in enforcing the Workload Management (WLM) using cloning and clustering for the better system performance.
• Expertise in implementation and designing of Disaster Backup and Recovery Plan.
• Experienced in working with different teams such as Network Engineering, Database team & Application teams to resolve the issues and provide customer satisfaction.
• Experience in automating jobs using Shell & Perl scripts.
• Installing and configuring for Oracle, Sybase, SQL Server, Informix Databases.
• Experience in configuration of LPAR using HMC and installed the OS using NIM server.
• Applied ILO/IMM/LOM/DRAC for remote access of servers on Linux/Solaris respectively.
• Expert in configuring and troubleshooting TCP/IP network services.
• Experienced in multitasking, working alone as well as working in a group.
• Expertise in System administration, System planning, co-ordination, commissioning,setting up security hierarchy and capacity planning.

TECHNICAL SKILLS:

Operating System: Red Hat Enterprise Linux (3.x, 4.x, 5.x & 6.x), Centos (3.x, 4.x, 5.x, & 6.x) Ubuntu (6.x, 7.x, 8.x, 9.x, & 10.x), SuSE Linux (9.x, 10.x, & 11.x) and AIX (V5.3, 6.1)

Hardware: IBM Blade Server HS22, Dell Power Edge Series, HP BL460, C7000. ILO, SunFire T2000Application Server’s: Web Server Apache, Weblogic, Litespeed, DNS, NIS, NFS, MS Terminal Server, Windows 2003/2008 Active Directory, Jboss, Microsoft IIS Server 4/5, Symantec Ghost, mail server, MTA, MDA, (POP, IMAP), Mongrel, Thin, Tomcat, IIS, Jboss, NTP, Sendmail, Postfix, Secure LDAP, Auto mount, Windows DC, SAMBA as Domain Controller with LDAP

Databases/ scripting: MySQL, MS SQL Server, Oracle 7, 8, 9, 10 & 11g, bash Shell scripting, Ksh Scripting, Perl Scripting, HTML, MS Access, MySQL Replication, MySQL High Availability with DRBD, MySQL Disaster Recovery and MySQL Clustered.

Storage/ Networking: TCP/IP, NFS, FTP, DNS, NAT, ifconfig, router, netstat, EMC, FC SAN, NAS, EMC Clarrion

Backup/ Monitoring: Windows, Nagios Monitoring System, UC4

Mail Servers: SMTP, POP, IMAP, Exim

Languages: PHP, PL/SQL, UNIX Shell Scripting, Jboss, Weblogic, OSB, Datapower, C, Java, J2EE

PROFESSIONAL EXPERIENCE:

Confidential, Asheboro, NC

Linux Systems Administrator / Engineer

Responsibilities:

• Installation/Maintenance of Hardware/Software in Production, Development & Test Environment as an integral part of the Unix/Linux (RHEL/SUSE/CentOS /AIX) Support team.
• Installed/Configured/Maintained/Administered the network servers DNS, NIS, NFS, SENDMAIL.
• Installed and Configured OpenLDAP 2.x server.
• Involved in Adding new disks, formatting, partitioning, disk space allocation, monitoring system performance, system tuning, server hardening and crash recovery issues.
• Installed and configured Linux Server using Jumpstart.
• Installed and configured Red Hat Satellite server for package transfer across servers, to store client’s system profile and to control other servers in the network.
• Performed Package management such as Installing, removing and updating & querying packages using RPM tool.
• Maintained Load balancing, High availability, Failover functionality and Disaster recovery included changing IP address of the web and app server machines, which caused change in the virtual host and http transport configurations.
• Designed data collection methods for specific project.
• Writing Bash/Shell/Perl scripts for managing day-to-day transactions & for automation of routine tasks.
• Monitored the performance of the system using PS, PRSTAT, VMSTAT, MPSTAT, PERFMETER and IOSTAT to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.
• Managed and configured LVM.
• Tuning the Kernel parameters for the better performance of applications like Oracle, WebLogic.
• Responsible for configuring Postfix mail relays with Mail Exchangers, Bind DNS Server and clients, SNMPv3 and NTP relays.
• Responsible for installing, configuring, maintaining, upgrading and troubleshooting EMC power path on Linux.
• Provided 24/7 on-call supports in debugging and fixing issues related to Red Hat Linux.

ENVIRONMENT: Linux (RHEL 5.x & 6.x), SUSE 11/10, CentOS (5.x, 6.x), AIX 6.1, Oracle 11g/10g, LDAP,Perl, Shell Scripting, Bash, VERITAS Volume Manager (VVM), F5 Load balancers, SiteMinder 5.5/4.5, EMC Storage SAN, VERITAS Cluster Server (VCS), DNS, NIS, NFS, SNMP, NTP, PS, PRSTAT, VMSTAT, MPSTAT, PERFMETER, IOSTAT.

Confidential, San Francisco, CA

Linux/UNIX Systems Administrator

Responsibilities:

• Installation, Configuration and upgrade of Red Hat Linux 4/5/6, CentOS 4/5, SUSE 10/11, Ubuntu (8.04,9.04 & 10.04), AIX (V5.3, 6.1) Operating System.
• User Administration, management and archiving.
• Creating Users & Groups and assign them with disk quotas and ACLs.
• Experience in installing and configuring Network Services: TELNET, FTP, DHCP, SSH, SAMBA, HTTP, TFTP etc.
• Configuring NFS, NIS, NIS+, DNS, Auto Mount & Disk Space Management on SUN Servers.
• Experience in Configuring and Managing Virtual Disks, Disk Mirrors & RAID Levels.
• Worked with OVF "Open Virtual Machine Format" supported tools VirtualBox, Red Hat Virtualization (XEN),and VMware Workstation.
• Experience with VMware Virtualization using ESX hypervisor of Vsphere 4.0.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat, WebSphere and Jboss servers in AIX and Linux environment.
• Experience in Active directory configurations and support.
• Experience with setting up Linux servers for Oracle Real Application Clusters and configuring SAN based mount points.
• Experience in storage administration support with EMC Symmetrix / DMX, Clariion, NetApp NAS filer and Brocade / Cisco Fiber Switches for zoning purposes.
• Experience in troubleshooting host-based connectivity issues related to EMC software like PowerPath,Navisphere, ECC client software and third-party HBA's (Emulex and Qlogic).
• Emulex and QLogic HBA cards installation and configuration of the host servers.
• Experience with Connectrix Manager and Data Fabric manager, Zoning, LUN allocation, Storage allocation to storage groups.
• Expertise in Performance Monitoring and Performance Tuning using Top, PRSTAT, SAR, VMSTAT, PS, IOSTAT etc.
• Expertise in creating and managing Logical Volume Manager in Redhat, CentOS and SUSE Linux.
• Server Consolidation and Migration of Applications on Oracle Enterprise and Java Applications.
• Experience in building Production Servers and validation for new build releases.
• SENDMAIL configurations and administrations, testing the mail servers.
• Creating new file system, managing & checking data consistency of the file system.
• Setup and configure VeritasNetBackup 5.x, 6.x and 6.5x NetBackup server / client & tape libraries.
• Monitor, Modify and Optimize NetBackup activity, backup schedules and reporting to proactively avoid issues.
• Performed automated installations of Operating systems using Jumpstart, KickStart& NIM installation.
• Installation of Packages and Patches for AIX (5/6), Red Hat Linux 4/5/6, Centos 4/5, and SUSE 10/11.
• Disk and file system management through Veritas Volume Manager / Veritas File System and Solstice DiskSuite.

ENVIRONMENT: Redhat (4.x, 5.x, 6.x), CentOS (4.x, 5.x), SUSE Linux (10.x, 11.x), Ubuntu (8.04, 9.04, 10.04), and AIX (V5.3, 6.1), Sun Enterprise Server, HP 9000 K, L, N Class Server, IBM RS/6000, pSeries Server, NetBackup (5.x, 6.x), VERITAS Volume Manager 4.x/5.0, SAN EMC Clariion CX 700/ CX 600/ CX 500, EMC DMC 2000/ 3000, NetApp NAS 3000.

Confidential, Virginia Beach, VA

Linux - Unix Administrator

Responsibilities:

• Worked on RedHat Enterprise Linux 3/4/5, SUSE Linux 9/10/11, and Ubuntu (8.04 & 9.04).
• Installation and configuration of Linux servers using kickstart& support for various applications which runs on Linux environment followed by performance tuning, patching and maintenance.
• Designing, Implementation, Configuring, & Managing Puppet server.
• Working knowledge on Apache, Tomcat and Jboss.
• Supporting 300+ Linux servers in production/stage/development environment.
• Creating VMware Lab setup as per Internal QA team’s requirement using VMware ESXi servers.
• Worked on VMware VirtualCenter Server for centralizing ESX and ESXi servers.
• Collaborated with the EMC and NetApp team for the storage requirements in Blade Hardware.
• Support and troubleshooting of Linux Apache, MySQL. Have knowledge on MySQL, Oracle Administration.
• Provided Support of multi flavor UNIX & Linux environment with various responsibilities.
• Setup and configured network TCP/IP at all
• Deployments, Drive Application Release Task Plans, Handle Application Outage if any Invite all team to bring the application up and running.
• Implement Root, Forest and Child Domain System with Additional Domain Server in the different sites.
• Implement Domain Name Server by Using Primary and Secondary DNS Servers.
• Configure Red Hat Enterprise Linux Server as a Data Storage Server.
• Installed and Configured DNS, DHCP, NFS, NIS, http, tftp and other network related services.
• Worked with object oriented software development methodologies and practices across all phases of the Software Development Lifecycle.
• Unix/Linux user's creation, file/dir. level permissions, Sudo permissions etc.
• Using VM converter converting Physical machines in VMware VMs.
• Updating/patching Linux Servers with latest rpm packages.
• User management, security planning and implementation.
• Setup and configured network TCP/IP at all levels on LINUX servers.
• Involved in the installation, monitoring and support of Unix based servers, firewalls, Cisco networks, perimeter security technologies, Internet technologies and remote office WAN/ LAN connectivity.
• Extensively Worked on Litespeed web technology, Apache web servers and Nagios.
• Administered user accounts, performed user maintenance on LINUX and PC workstations. Monitored security issues. Administered system mail and Internet access. Configured network file systems.
• Worked on different Unix/Linux platforms and mail servers.
• Worked on many domains in shared and dedicated servers.
• Day to day duties for Linux server maintenance and support to developer's team for their issues application, tuning, troubleshooting, and software running.
• 24/7 support for the LINUX servers. Rotating on call pager responsibilities for Production environment.

ENVIRONMENT: Red Hat Linux (3.x, 4.x, 5.x), SUSE (9.x, 10.x, 11.x), Ubuntu (8.04, 9.04), Puppet, Apache, Tomcat, Jboss, VMware, XEN, KVM, ESX, MySQL, Apache High Availability, CISCO Devices, JAVA, PHP, Subversion, Nagios, WAN, LAN, Litespeed, TCP/IP.

Confidential

Unix - Linux Admin/ Engineer

Responsibilities:

• Install, configure, troubleshoot, secure and support RedHat 4/5, CentOS 3/4/5 and SUSE Linux 9/10 servers and also product servers.
• Worked on installation and configuration of Weblogic.
• Installed and configured SOA suite.
• Supported AWS set ups Windows Administration teams during production.
• Worked on Litespeed web technology and Apache web servers and Nagios.
• Worked on Litespeed web technology and Apache web servers and Nagios
• Administered user accounts, performed user maintenance on different Linux environment. Monitored security issues, administered system mail and Internet access. Configured network file systems.
• Installation and configuration of FTP, TFTP, HTTP, SAMBA, DNS etc.
• Deployment of application patches and upgrades; perform reboots & configuration changes.
• Worked on different Unix/Linux platforms and mail servers.
• Installed JBOSS on Linux and Unix Servers.
• Worked on many domains in shared and dedicated servers.
• Worked on Weblogic Server 10g and 11g, webLogic Platform and load balancing in servers.
• Memory analysis of servers, clustering and DNS.
• Monitored dedicated and shared servers having more than 1000 domains.
• Worked on IMAP, POP, SSH Configuration and Hardening as well as troubleshooting and addressing issues in a Helpdesk environment.
• Server Security Auditing, Vulnerability Assessment and correction.
• Proficient with Cpanel and WHM management (setting up accounts, remote backups, DNS clusters, Failover solutions etc).
• Worked on configuring and troubleshooting VPN Technologies (OpenVPN, Pptpetc).
• Monitoring and Managing Network Devices using Cacti, PRTG, etc.
• Third party Software Installations and configuration - Software management (Fantastico, RVSkinsetc).
• Security Protection (Intrusion Detection with Snort, tripwire and ipfw/iptablesetc).
• DNS and reverse DNS delegation experience (Bind, QDNS).
• Linux Kernel Security, regular maintenance, compiles and OS reinstalls.
• Administration and Optimization of security tools - experience with ClamAV, Sophos AV, ExiScan and SpamAssassin.
• Core System Files Hardening and Optimization (sysctl.conf, resolv.confetc).
• Monitoring servers and responding to event notifications. (Service outages, High Load Alerts etc) experience with Nagios.
• Working knowledge of Database Technologies (MySQL, PGSQL), performance Optimization and Hardening.
• Provide 24/7 on-call support.

ENVIRONMENT: Redhat Linux (4.x, 5.x), Centos (3.x, 4.x, 5.x), SUSE (9.x, 10.x), Oracle 10g & 11g, SOA, Nagios, Litespeed, Tomcat, Jboss, DNS, IMAP, POP, SSH, SQL, PL/SQL, shell scripts, SQL Loader, Toad, Windows, Putty, Storage, Cpanel, WHM, VPN, Cacti, PRTG, RDNS, QDNS, ClamAV, Sophos AV, ExiScan, SpamAssassin.

Confidential

UNIX/Linux Administrator

Responsibilities:

• Worked as a Systems Administrator on Red Hat 3/4, CentOS 3/4 and Ubuntu (6.06, 7.04)
• Worked on Applying patches, installed monitoring tools, upgraded BIOS on HPC Clusters.
• Scheduled users to perform High Performance Computing activities on the Linux Cluster.
• Created users and groups and assigned them appropriate quotas and ACLs as per company requirement.
• Experience managing and tuning MySQL and writing SQL scripts.
• Installed and configured Nagios monitoring tool to manage infrastructure.
• Applied patches and supported Linux Servers with Oracle Database servers.
• Worked on Kernel tuning and Kernel patching.
• Monitored System Performance, Tuned and optimized systems for better performance.
• Managed Disk using LVM, resized disk space when required and managed disk space from NetApp filers.
• Setup NTP server and synchronized clients with NTP server.
• Troubleshoot application problems by diagnosing issues.
• Provided 24/7-support coverage, pager support and weekend support.

ENVIRONMENT: Red Hat Linux (3.x & 4.x), Centos (3.x, 4.x), Ubuntu (6.06, 7.04), Netapp, NTP, Nagios, MySQL, SQL, HPC.