SUMMARY

• Having 7+ years of experience as Linux administrator on RedhatEL 4.x, 5.x,6.x Debian, CentOS4.x, 5.x,Suse 9 &10,Oracle Enterprise Linux 5 &6 Solaris 8,9, 10 and VMware vSphere ESX/ESXi4.x 5.x environment.
• Hands on Experience in Redhat Enterprise Linux and Kickstart - PXE installation.
• 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 Redhat 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 Portand wireless networks).
• Experience with all kinds of MS Office like Excel, Outlook, and PowerPoint.
• 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.
• Experiences in FTP, DHCP, SAMBA, users setup/troubleshooting.
• Experience managing various filesystem using LVM configured filesystem 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 in managing logical volume manager in Redhat Linux.
• Responsible for Backup and Recovery operations of various servers using VERITAS Net Backup.
• Advance Scripting skills in Bash Shell.
• 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 inMicrosoft 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: Redhat AS/ES /4/5/6Solaris 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, ifconfig, route,HTTP, SAMBA

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

Tools: VMWare, IBM-RSA, Dell -RAC

PROFESSIONAL EXPERIENCE

Confidential, Richardson, TX

Senior Linux 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 RedhatEnterprise Linux 5/6 using Kickstart.
• Installed & configured Guest operating system like Redhat on VmwareESX 5.x.
• Configured, maintained, applied changes and fail-over schedules of HA servers running Veritas Cluster Server and Redhat Cluster Server.
• ImplementedKick-start for Redhat 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.
• 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.
• Created sudoaccess to users on Linux and Solaris servers.
• 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).
• Involved with the deployment teams in trouble shooting and fixing day-to-day problems of the applications in production on 24/7 schedule.

Environment: SUN Solaris 8/9/10, RHEL 5.x/6.x, VMware ESX5.x, Apache 2.2.x, SuSE EL 9/10, WebLogic 10/11g, WebLogic 8.x/9.x, SunFire T1000, T2000, Sun M9000, M5000, M3000, Sun X3-2, X3-4, HP C Blade System, BL460c, BL420c EMC, Veritas Storage Foundation 5, 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 RedHatLinux.
• Performed Red Hat Linux Kickstart installations on RedHat 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.
• Working with Logical Volume Manager and creating of volume groups/logical performed Red Hat Linux Kernel Tuning.
• Storage Provisioning, Volume and Filesystem Management using LVM, Veritas Volume Manager and VeritasFilesystem (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 HPUX blades and Itanium servers with Redhatlinux RHEL 5.x/6.x along with SAN storage on EVAs. Also implemented and support HPUX Service guard on Linux servers.
• 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 runbooks.
• 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 ofRedhatLinux (3,4,5), CentOS, 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, Redhat 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 QLogic 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 RedhatLinux.
• 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 NetBackup 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, RedhatLinux 4/5.
• Disk and file system management through Veritas Volume Manager / Veritas File System.

Environment: Redhat (3,4,5), CentOS and SUSE Linux, Solaris 8 / 9, Sun Enterprise Server, HP 9000 K, L, IBM RS/6000, pSeries Server, NetBackup 5.0, Veritas Volume Manager 4.x, EMC DMC 2000/ 3000, Windows NT 2003/2000/ XP.

Confidential, SFO, CA

Linux Administrator

Responsibilities:

• Build and support cluster infrastructure (Sun Cluster 3.x, Veritas cluster, Linux RAC cluster).
• Provided Administrative support for about 225 Solaris/Linux servers running Web logic, Web sphere Suites, Apache Web Server and Multimedia Messaging applications.
• 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: redhatLinux, Web Sphere, Virtual Box, RedHat 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.xservers 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: RedhatLinux, Sun Solaris, SuseLinux, AIX, SAN, Samba, NFS, VMware ESX and VMware server, Apache, Tomcat and Jboss, Oracle Cluster, Web sphere servers.