SUMMARY

• Around 8 years of experience as Linux administrator on RedHat EL 4.x, 5.x, 6.x, CentOS4.x,5.x, SUSE 9 & 10, Oracle Enterprise Linux 5 & 6, Solaris 8, 9, 10 and VMware vSphere ESX/ESXi 4.x 5.x environment.
• Extensive experience with Virtualization technologies like installing, configuring, administering VMware ESX/ESXi. Created and managed VMs (virtual server) and also involved in the maintenance of the virtual server.
• Experience in Creation and managing user accounts, security, rights, disk space and process monitoring on Red hat Linux.
• Extensive understanding of networking concepts, (IE. Configuration of networks, router configuration and wireless security, TCP/IP, VPN, Content Filtering, VLANs, and routing in LAN/WAN, Ethernet Port and wireless networks).
• Managed Patches, Upgrades and Licensed Products for System software on allLinuxServers.
• Experienced in installation, configuration, design and ongoing maintenance of Cisco router and switches.
• Experience with x86/x64Intel, HP, IBM & Dell hardware like rack - mounted servers, tower servers, desktop, laptop and other peripherals.
• Experience in monitoring the availability & performance ofLINUXservers.
• Experience in installing, configuring and implementing the RAID technologies.
• Experience in iSCSI, NFS storage and RAID concept.
• Involved in upgrading production (Linux and Solaris), development & QA servers
• Experienced in supporting database system, exadata & oracle RAC on Red Hat Linux.
• Experienced and good working with data automation process.
• Excellent skills in analyzing, designing, implementing and system integration, Knowledge onSwitches, Routers, & Firewalls.
• Experiences in FTP, DHCP, SAMBA, users setup/troubleshooting.
• Experience managing various file system using LVM configured file system through network using NFS, NAS methodologies and installed RAID devices.
• Experience in Server monitoring, application monitoring with the help of HP insight, Nagios, Zabbix.
• Experienced in creating, mounting file systems and recovering file system errors.
• Experienced in scheduling different types of system tasks as per requirement.
• Good knowledge of installation and update of drivers for HBAs to provide connection between servers & clients.
• Experience inActive Directory, DNS, DHCP.
• Responsible for Backup and Recovery operations of various servers using VERITAS Net Backup.
• Working Knowledge on using and developing Perl and python scripts used to automate day to day administrative tasks.
• Experience with Cloud servers, LAMP and J2EE applications.
• Installation and configuration of Web Application servers like Apache, Tomcat and WebLogic.
• Experience in Microsoft Office Suite, Open Office, Visio, Outlook, Printing, Windows networking, Security patching
• Experience supporting 24x7 production computing environments. Experience providing on-call and weekend support.

TECHNICAL SKILLS

Operating Systems: Red hat AS/ES /4/5/6 Solaris 8/ 9/10, Windows.

Hardware: HP ProLiant, Dell Power edge, IBM x series, Sun Sparc

Languages: C, C++, FORTRAN and Pascal

Database: Oracle 9i, 10g, 11g DB2, MS Access, MYSQL 3.X

Web Applications: HTML, PHP

Scripting: Perl Scripting, Shell Scripting on Linux and Solaris

Networking: TCP/IP, NFS, FTP, DNS, DHCP, if config, route, HTTP, SAMBA

Web/APP Servers: Apache Web Server, Tomcat Web Server, WebSphere

Tools: VMWare, IBM-RSA, Dell -RAC

PROFESSIONAL EXPERIENCE

Confidential, Charlotte, NC

System Administrator

Responsibilities:

• Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Trouble Shooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on Red Hat Linux Systems.
• Administrating & Installing OS Packages & Patches using YUM, and RPM.
• Created and configured volume groups and logical volumes, extended logical volumes for file systemgrowth needs using Logical Volume Manager (LVM) commands.
• Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
• Worked on virtual and physical Linux hosts and involved in day to day administrative activities such as maintaining user accounts, password management, providing advanced file permissions to specific users etc.
• Configuring distributed file systems and administering NFS server and NFS clients as per system user requirements.
• Responsible for scheduling various regular, future, queue tasks using crontab.
• Build and upgraded puppet master for each DEV, UAT and PROD environments.
• Implemented the monitoring tools like Nagios to monitor services like CPU, Hard drive, Memory utilization, Users, HTTP, SSH etc.
• Setup, configured and maintained NFS, NIS, and TCP/IP network, setting up SSH and SCP features between hosts.
• Performed Installation, configuration and Administration of VERITAS Volume Manager.
• Worked with disk encryption technology on servers, Data Security tools.
• Scanning the newly assigned LUNs to the serves and assigning them to volume group and increasing the file system using Red Hat volume manager.Configured RedHat Satellite Server for patching and configuring servers to update patches from the satellite server.
• Mounting & un-mounting the NetAPP storage LUNs to the RedHat Linux servers and troubleshooting the issues encountered.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Developed bash shell scripts to automate routine activities.
• Network trouble shooting and Worked closely with vendors on Hardware Problems, software fixes Provided support for break/fix incidents.
• Responsible for monitoring and working on problem tickets using BMC Remedy.
• Provided afterhours and weekend support to facilitate the issues in the production environment.
• Planned and performed the upgrades on Linux and AIX operating systems and hardware maintenance on HP and POWER servers like increasing memory, disk, replacing failed hardware.
• Installation, Configuration and Administration of Web logic, Web sphere and Apache Servers in Linux and Solaris Servers.
• Monitoring the system performance and doing the kernel tuning to enhance the system performance.
• Troubleshooting Production Server Problems related to web applications, Send mail, disk space, file system, DNS and network connectivity.
• Provided 24/7 on-call support on a weekly basis.

Environment: RHEL, AIX, VMWare, VSphere, LVM, Disaster Recovery, Remedy, Shell Scripting

Confidential, Frisco, TX

UNIX Systems Administrator

Responsibilities:

• Built RHEL 5, 6, 7 servers on ESX 5.x VMware platform through kickstart.
• Production support to over 3000+ mission critical servers running multi-terabyte DBs such as Oracle, RAC, Sybase and many more applications such as WebLogic, apache, etc.
• Performance fine tuning by configuring RAID, kernel parameters, network stack on RHEL and Solaris platforms including zones and LDOMs
• Scripting in Korn and Bash for job automation
• Yum patching of Linux servers using satellite server
• Server security hardening for PCI, SOX compliance using DSS standards - automated via scripting the patch compliance reporting
• Configure SAN storage using LVM, Veritas Volume Manager, ZFS
• Support and manage Citrix and F5 load balancers, which help keep site availability up.
• Configure end-to-end LTM and GTM VIPs and the related DNS configurations.
• System administrative functions to the Virtual Desktop Infrastructure (VDI) / Desktop as a Service (Dais) support for unclassified and classified users
• Provide performance tuning strategies and their implementation Disaster Recovery design and management for the virtual environment.
• Real time Interface with internal services using existing tools/scripts to provision physical, virtual and cloud server and configure compute for production traffic.
• Follow established SOPs (Standard Operating Procedures) for various tasks.
• Familiar with the standard concepts, practices, and procedures within the disaster recovery field.
• Patched servers, firmware updates, breaking and re-establishing root mirrors
• Worked with backup (TSM, Veritas NetBackup), monitoring (Tivoli, Nagios), network and storage teams to build out servers in a given project
• Involved in Virtualization project which included designing, implementing and troubleshooting more than 300 VMware ESX (3.5 update 4) servers, and Oracle Virtual Machines (OVMs)
• System Backup and Recovery from tapes using ufsdump, ufsrestore, tar and cpio, File system administration
• Prep servers for Oracle RAC clusters and standalone databases.
• Configure shared FC, NFS and iSCSI Storage. Create ASM disks and make sure cluster verify tools pass all checks before handing over servers to DBA for CRS and DB install.
• Setup HugePages and assist DBA with RMAN Backup setup, ADG or Data Guard installation.
• Provided Operational Support to over 3000 servers hosted globally. Lead bridge calls in case of critical production issues. Recover OS and help bring applications back online quickly.
• Troubleshoot issues with VMs running on VMware ESXi 5.5 and 6.0. Review hypervisor logs using VSphere web and thick client. Troubleshoot performance and storage issues. Build, migrate and clone machines.
• Prepared root cause analysis and work with incident managers to prevent recurrence of critical issues.

Environment: RHEL 5.x/6.x, SUN Solaris 8/9/10, VMware ESX5.x, Apache 2.2.x, SuSE EL 9/10, WebLogic 10/11g, WebLogic 8.x/9.x, SunFire T1000, Tomcat, T2000, Sun M9000, M5000, M3000, Sun X3-2, X3-4, HP C Blade System, BL460c, Jboss.

Confidential, Richardson, TX

Linux System Administrator

Responsibilities:

• Monitored and administered Servers for day-to-day problems, patches, user administration, hardware failure, monitoring log files, backup, software patching, configuration changes and documentation.
• Installed, upgraded and configured SUN Solaris 9/10on Sun Servers using Jumpstart and Red hat Enterprise Linux 5/6 using Kickstart.
• Installed & configured Guest operating system like Red hat on VMware ESX 5.x.
• Configured, maintained, applied changes and fail-over schedules of HA servers running Veritas Cluster Server and RedHat Cluster Server.
• ImplementedKick start for Red hat environments.
• Involved in complete Administration tasks on SUN Solaris, Red Hat Linux and documentation for the projects executed.
• Installed, monitored and supported Web servers and Application Servers on Solaris and Linux environments.
• Hardened the new AIX, HP-UX and Linux systems because of the newly installed defense-based software systems.
• Manage to install A5200 arrays, new HP-UX systems, SAN and configured LUN for 100 HP-UX systems, 60 AIX and 30 Solaris systems.
• Assisted in configuring the application servers with other components such as database, web servers, Active Directory, etc.
• Perform regular system administration tasks and perform troubleshooting in order to keep the UNIX/Linuxenvironments running smoothly. Implement change management requests; resolve incident tickets through 'HP Service center' ticketing system. Complete UNIX/Linux related projects on a timely manner.
• Administer the Network issues and Resolving Operating Systems related issues of AIX, Linux and making sure that the users get the proper environment for testing.
• Upgraded current Linux version to RHEL version 5.6.
• Fine tuning of Operating System and performance analysis,uptime and response time and SLA.
• Performed UNIX System Administration. Fine tuning, Kernel debugging, process scheduling, disk and file system I/O, kernel internals, TCP/IP communications.
• Automating the installs using Jumpstart and Kickstart and building post install scripts using Shell scripting in SUN Solaris and RHEL Servers.
• Performed installation, configuration and maintenance of Solaris 10 with Veritas Volume Manager 5.0 and Veritas Cluster Server 5.1.
• Worked extensively with Vendors Sun, NetApp, and HP for troubleshooting the issues and in replacing the failed Hardware.
• Implemented RAID techniques and the creation of Disk groups and volumes, plexes using Veritas Volume Manager 5.0.
• AdministeredLinuxservers for several functions including managing Apache/Tomcatserver, mail server, My-SQL database, and firewalls in both development and production.
• Setting upOracleserver inLinux/Unix environment.
• Updating YUM Repository and RedHat Package Manager (RPM).
• Configured Nagios to monitor the resources on the server farm and support them on a 24x7 basis.
• Creating account for new users and deleting accounts for the expired users.
• Troubleshooting and analysis of hardware and software failures for various Solaris servers (core dump and log file analysis).

Environment: RHEL 5.x/6.x, Apache 2.2.x, SuSE EL 9/10, WebLogic 10/11g, WebLogic 8.x/9.x, HP C Blade System, BL460c, Jboss, BL420c EMC, Switches, Oracle, Veritas Storage Foundation 5, Active Directory, Veritas Cluster Server 5.1, VMware.

Confidential, Miami, FL

Linux Administrator

Responsibilities:

• Experienced as Red Hat Enterprise Linux administrator.
• Building, Installing, Configuring servers from scratch with OS of Red HatLinux.
• Performed Red Hat Linux Kickstart installations on Red Hat 4.x/5.x, performed Red Hat Linux Kernel Tuning, memory upgrades.
• Monitoring and service issue resolution of LAMP stack web servers, both shared and VPS.
• Storage Provisioning, Volume and Filesystem Management using LVM, Veritas Volume Manager and Veritas Filesystem (Veritas Storage Foundation), Configuring ZFS file systems.
• System Data and Process Architect for Service-Now Deployment.
• Created Global and Regional Process workflow maps and design documents.
• Implementation of Oracle RAC 10g on HP UX blades and Itanium servers with RedHat Linux RHEL 5.x/6.x along with SAN storage on EVAs. Also implemented and support HPUX Service guard on Linux servers.
• All facets of HP-UX/Linux Systems Administration in a large SAP/Oracle environment on HP IA and ProLiant Blades/C7000 Chassis, rx3600 i2, IA VM's, SG Clusters with SG Extensions for SAP, HA NFS and VMware VM's.
• Experience with physical and virtualized RHEL Linux systems.
• Created HP-UX Service guard clusters and Veritas Clusters (VCS) as prompted by demand.
• Maintained app clusters SLA’s.
• Created and led process workshops to define customer's requirements to build out Service-Now.
• Setting up Jboss cluster and configuring apache with Jboss on Ret Hat Linux. Proxy serving with Apache. Troubleshooting Apache with Jboss and Mod jk troubleshooting for the clients.
• Installation and configuration of Apache Webserver in a LAMP stack.
• Monitoring connections and load of Apache server using mod status.
• Troubleshoot customer applications issue.
• Configuring DNS, DHCP, NIS, NFS and other Network Services in IBM Power Series.
• Troubleshoot OS issue using system message logs.
• Troubleshoot Web Services API and Apache Tomcat.
• Install packages using RPM.
• Created KSH/Bash scripts to monitor processes and making sure process startup when operating system restarts using chkconfig and RC startup levels.
• Manage user/group and sudo access on the Linux operating system.
• Setup logrotate for applications logs and system logs.
• Open ports for applications and process that require special ports.
• Document process and procedures for system and database usage.
• Maintain team wiki and making sure all documents are in the correct format.
• Do documentations and system training to teammate and lower tier support.
• Documenting processes and troubleshooting scenarios on run books.
• Performed systems monitoring, upgrades, performance tuning and backup and recovery.
• Setting up the lab environment with Tomcat/Apache, configuring the setup with F5 virtual load balancer for customer application.

Environment: Red Hat Linux 3/4, Acronis, Solaris 8/9, Sun Enterprise Servers, SUN FIRE 6800/E6500/E4500, IBM RS/6000, Disk Suite, Veritas Volume Manager 4.0, LDAP, DNS, NIS, SNMP, Shell scripting, SENDMAIL, Apache, WebSphere, Sun and Veritas Clusters.

Confidential, Denver, CO

Linux Administrator

Responsibilities:

• Installation, Configuration and upgrade of Red hat Linux (3,4,5), Cent OS, SUSE, AIX, HP-UX & Windows /2008 Operating System.
• User Administration, management and archiving.
• Experience in Configuring and Managing Virtual Disks, Disk Mirrors & RAID Levels.
• Experience with VMware Virtualization using ESX hypervisor of VSphere 4.0.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat and Web Sphere in AIX, and Linux environment.
• Experience in Active directory configurations and support.
• Installed Iplanet web server on Linux and Solaris boxes.
• Implemented and administered VMware ESX 3.5, 4.x for running the Windows, Red hat Linux Servers on development and test servers.
• Administration and troubleshoot skills on Disks & File Systems forLinuxsystems.
• Written various Linux shell scripts for example- apps init scripts, periodic backup scripts of Perforce depot, xterm tittle pointing to host alias names while login in.
• Installation/Administration of TCP/IP, NIS/NIS+, NFS, DNS, NTP, Auto mounts, Send mail and Print servers as per the client’s requirement.
• Emulex and Q Logic HBA cards installation and configuration of the host servers.
• Expertise in Performance Monitoring and Performance Tuning.
• Expertise in creating and managing Logical Volume Manager in AIX, HP-UX and Red hat Linux.
• Experience in building Production Servers and validation for new build releases.
• Security, users and groups administration.
• Creating new file system, managing & checking data consistency of the file system.
• Monitor Modify and Optimize Net Backup activity, backup schedules and reporting to proactively avoid issues.
• Built a Linux kickstart server on x86 machine. Wrote shell scripts using C shell to initiate kickstart.
• Installation of Packages and Patches for AIX, Solaris 8/9, Red hat Linux 4/5.
• Disk and file system management through Veritas Volume Manager / Veritas File System.

Environment: Red hat (3,4,5), Cent OS and SUSE Linux, Solaris 8 / 9, Sun Enterprise Server, HP 9000 K, L, IBM RS/6000, p Series Server, Net Backup 5.0, Veritas Volume Manager 4.x, EMC DMC 2000/ 3000, Windows NT 2003/2000/ XP.

Confidential, SFO, CA

Linux Administrator

Responsibilities:

• Performed day-to-day administration and maintenance on a farm (#635) of HP-UX (11.11, 11.23, and 11.31) 24/7 coverage mode servers and peripherals with 99% system uptime SLA.
• Provided Administrative support for about 225 Solaris/Linux servers running Web logic, Web sphere Suites, Apache Web Server and Multimedia Messaging applications.
• Build and support cluster infrastructure (Sun Cluster 3.x, Veritas cluster, Linux RAC cluster).
• Performed Operating System upgrades on HP-UX 11.11 and 11.23 servers.
• Maintained patching, firmware upgrades and fixes to servers as mandated by manufactures and customers.
• Installation, Configuration and Maintenance of RedHat Operating System with Veritas Volume Manager and Veritas Cluster Server.
• Trouble shooting the OS related Issues.
• Created new file systems whenever required.
• Installed and configured JUMP START Server.
• Performed tasks such as User, group management, adding, removing disks and creating file systems as requested on UNIX/WINDOWS Servers.
• Extensive working experience in process scheduling, disk and file system I/O, kernel tuning, TCP/IP networking.
• Installing Veritas Volume Manager and configuring Disk Groups, Volume Groups and Logical volumes to manage the storage resources.
• Disk Management on using SMIT.
• Day to Day activities included handling security issues like stale UNIX account cleanups, 90-day password changes, setting max age and min age, creating a list of umask permission for various users.
• Involvement with the Deployment teams in trouble shooting and fixing day-to-day problems of the applications in production on 24 x 7 schedules.
• Configured and maintained FTP, DNS, NFS and DHCP servers.
• Ensured the data redundancy with RAID implementation.
• Responsible for the configuration of DHCP server and Samba server.
• Responsible for DNS server management, user disk quota management, Projects, Quotas management.

Environment: RedHat Linux, Web Sphere, Virtual Box, Red Hat Virtualization (XEN), Solaris 8/9, Apache Tomcat and Jboss, Oracle Cluster.

Confidential

Linux Administrator

Responsibilities:

• Installation, configuration and administration of Red Hat Linux servers and support for Servers.
• Installation, maintenance and regular upgrades of Red Hat Linux Servers using kickstart based network installation
• Provided 24x7 System Administration support for Red Hat Linux 3.x, 4. X servers and resolved trouble tickets on shift rotation basis.
• Managing Compaq and Linux workstations and servers.
• Installation of patches and other software packages
• Monitoring system performance, adding /removing /administering hosts, users, disks on DNS / NIS domain.
• Configuration of Hardware and Software RAID on Digital & Sun Servers
• Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.
• Administrative tasks such as System Startup/shutdown, Backup strategy, Printing, Documentation, User Management, Security, Network management.
• Wrote bash shell scripts for getting information about various Linux servers
• Administering NFS Mounts.
• Troubleshooting Backup and Restore problems.
• Creation of LVMs using Linux utilities.
• Monitored overall system performance, performed user management, system updates and disk & storage management
• Performed OS upgrades and Patch loading as and when required.
• Backing up and restoring files across the network.

Environment: RedHat Linux, Sun Solaris, SUSE Linux, AIX, SAN, Samba, NFS, VMware ESX and VMware server, Apache, Tomcat and Jboss, Oracle Cluster, Web sphere servers.