SUMMARY

• Over 7+ years of experience on various Versions of UNIX (Red Hat Linux, SUSE, Ubuntu).
• Build, configure and support RHEL and physical and virtual machines for versions 5.x and 6.x
• Expert in in building Redhat Linux physical and virtual servers & migrating and/or upgrading Linux servers from one OS release to another.
• Experience in System Administration, System Builds, Server builds,Installs, Upgrades, Patches, Migration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoringand Fine - tuning on UNIX Red Hat LinuxSystems.
• Installed, monitored and supported Web and ApplicationServers on Solaris and Linux environments.
• Strong technical background in Storage, Disk Management, Logical Volume Management (LVM) and logical partitioning.
• Experience in administrating ESXi 3.5, 4.x and 5.1 servers and applying security patches to the ESXi servers
• Expert in ESXi servers using the Vsphere client and Vcenter for managing the multiple ESXi servers and performing the vmotion
• Experience in differenet kind of migration like Physical to virtual servers and virtual to virtual
• Worked extensively on DHCP, DNS, NFS, NIS, NIS+
• Experience with system monitoring, load balancing.
• Experience with Oracle RAC clustering and as well as creation and deletion of ASM disks in Oracle RAC
• Experience in installing local and remote YUM server on Redhat.
• Experience in using various network protocols like HTTP, UDP, POP, FTP, TCP/IP, and SMTP.
• Proficient in configuring KickStart servers to initiate installation of RedHat Linux on several machines at once.
• Experience in handling the HP service guard cluster, Configuration,Storage migration and managing the packages
• Experience in Package Management using RedHat RPM/YUM and RedHat Satellite server.
• Oracle RAC and ASM, Installation/configuration of ASM and configuring the ASM disks
• Creating and maintaining users, profiles, security, rights, disk space and processmonitoring.
• Experience in writing Shell scripts using ksh, bash, perl, for process automation of databases, applications, backup and scheduling to reduce both human intervention and man hours.
• Experience supporting 7x24 production computing environments. Experience providing on-call and weekendsupport
• Package management and kernel upgrades to the Linux servers.
• Expert in troubleshooting the Linux server’s, resolving the boot issues using rescue methods
• Experience NIC bounding configuration in Linux and UNIX systems to increase the bandwidth or redundancy based on requirement by the application.
• Expertise in upgrading HP ILO& BIOS Firmware as HP recommendation regularly on HP servers and chassis (C7000).
• Knowledge on Cisco UCS Blade Infrastructure and with the different storages like EMC and IBM
• Experience in performing resource monitoring, performance tuning, and scaling of infrastructure as needed
• Installation, Configuration & administration of Solaris 9.x,10.x
• Volume management in Solaris using SVM & VxVM and with the SPARC hardware
• Worked on Linux and Windows-based systems administration skills in a Cloud Computing and Virtualized environment for AWS
• Expertise in AWS, experience in implementing new AWS systems and migration of existing systems to AWS
• Worked on Puppet to organize and execute configuration plans on servers
• Worked on Jenkins for Building and Monitoring deployment jobs related to software project
• Worked on Stash and Git-Hub for creating and managing repositories
• Worked on Jira ticketing tool for creating, managing and resolving issues
• Monitored the servers on Icinga monitoring tool for system performance
• Worked on Splunk for searching errors related to the issues for monitoring purposes

TECHNICAL SKILLS

Operating Systems: RHEL 7.x,6.x/5.x/4.x/3.x, IBM AIX 5.x, Windows NT4.0, Windows 98/2000/XP/VISTA,VMWARE ESX/ESXi

Hardware: Sun Fire Servers - E25k, E15k, 12k, E280R, E480R, V240,420R, V440, V480, V490, V880,V890 and 4800

Data Centre Servers: E250, E450, E3000 and E3500

Tape Libraries: Sun StorEdge L20/L40/L60, L180 and Storagetek’s 9840

A/B/C Fibrechannel: Arrays - Sun StorEdge 3130, A1000/D1000, EMC DMX 800 and 1000

Languages: Shell scripting, PERL, C, C++, PHP, JAVA, PL/SQL, HTML, JavaScript

Databases: Oracle 10g/9/8, Sybase 11.5.1, POSTGRESSQL, MYSQL, MSACESS

Networking: TCP/IP, DNS, NFS, NIS, SSH, DHCP, Cisco Routers / Switches and LAN

Tools: Sun Cluster 3.2, VERITAS Netbackup 6.0, VERITAS Storage Foundation Suite, Solaris Volume Manager, sendmail

Web Technologies: Lotus Domino 5 / 6, Apache 2.0, Weblogic 8.1/10, WebSphere, JBoss, IPlanet, IIS, HIS.

PROFESSIONAL EXPERIENCE

Confidential, NJ

Senior Linux System Administrator

Responsibilities:

• Installed, Deployed Red Hat EnterpriseLinux 4.x/5.x/6.x, CentOS and installation of packages and patches for Red hat Linux Servers.
• Installed, configured and maintained Sun Servers
• Administer and configured various FS like UFS, VxFS, ZFS, Pseudo FS
• Installed and MaintainedSolaris Jumpstart environment
• Configured and supported domain on Sun Fire Servers
• Configured and done administration of Sun and Veritas logical volume manager
• Worked on LDOMs and Zone in solaris operating systems
• Installed, Configured and maintained HP-UX servers
• Performed SAN administration in order to add LUNs to an HP UX/Linux server
• Worked with MySQL, MS SQL Server, and their feature set
• Created database in Mysql as per the requirement
• Installed, Configured Mysql in different Linux operating systems like RHEL and oracle Linux
• Installation, configuration, Troubleshooting and administration of AIX 5L, 6.1 & 7.1 operating systems
• Involved in troubleshooting of Redhat Linux server issues and hardware issues and replacements.
• Working with the hardware vendors and application team for the faulty replacement and planning the downtimes accordingly
• Creating customized Kickstart profiles for each server and making ISO to build the server
• Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satelliteserver, Up2Date, YUM, RPM tools.
• Performance Tuning and Management for Linux server and working with the application/database team to resolve issues.
• Creating the filesystems using redhat volume manager and performing the healthcheck on regular basis for all Linux serves
• Scanning the newly assigned LUNs to the serves and assigning them to volumegroup and increasing the filesystem using redhat volume manager
• Managed activities for HP-UX and Oracle Linux instances to operate, release and maintain both physical and virtual environments
• Performed system configuration and hardening Linux/HP-UX in order to provide optimum performance (plan and implement system changes, adjust parameters and set-up)
• Mounting & unmounting the netapp storage LUNs to the Redhat Linux servers and troubleshooting the issues enocuntered
• 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.
• Working on HP, Dell servers using DRAC and ILO consoles and resolving issues and replacing the failure hardware
• Performed kernel and database configuration optimization such that it limits I/O resource utilization on disks
• Kernel parameter tuning and PerformanceMonitoring using tools like Glance plus, vmstat, mqstat and addressing swap issues in Redhat Linux servers
• Creating User, Group home directories and password administering in UNIX/Linux servers
• Replication of data from production to DR using IBM Flash technology and bringing the applications to verify the DR synch for all Linux servers
• Installation/Configuration of ESXi 3.5, 4.x and 5.1 servers and applying security patches to the ESXi servers
• Managing the ESXi servers using the Vsphere client and Vcenter for managing the multiple ESXi servers
• Performed Vmotion for the virtual machines from one ESXi to another ESXi server for the hardware or ESXi Maintanence
• Planning the major patch releases by coordinating with the application team for the proper implementation of security patches within the environments
• Involved in migration of Physical to virtual servers (P2V) and virtual to virtual (V2V)
• Creation of VM in ESXI server and deploying the Linux Operating system
• Assignment of LUN’s to the VIO server and working with the SDDPCM for IBM Storage and EMC powerpath drives for the EMC storage
• Upgrading of powermt/powerpath version to the latest level
• Installing new software or file sets, packages and other third party applications when required by the developer or business.
• Checking the file systems and increase/decrease the file system if required.
• Fixing mount issues, checking filesystem integrity, running fsck in maintenance mode on rootvg logical volumes if any corrupted lv’s in rootvg.
• Creating the RAW logical volumes for Oracle RAC and ASM and working with the database team to resolve the issues
• Working with the database team to install/configure the pre-requisites for the Oracle database installation/configuration on the Redhat Linux servers.
• ITM agent installation, configuration and setup monitoring for application logs.
• Configuring NFS on the servers, working with NFS mounts and related issues.
• Creating /removing paging space, checking paging space usage and increase/decrease if required.
• Closely working &coordinating with application team in case of any production issues
• Working with the Storage team in case of any data replication or LUN issues.
• Administrating MQ,WAS,HIS, Involved in the build and support of DEV, QA and UAT WAS 6.1.
• Stop and start of Websphere Instances, MQ channels and IHS (http servers), Installed SSL certificates on the web servers
• Printer installation & configuration, working with spooler and scheduling the print jobs
• Modifying the print queues and administration on print queues
• Installation & Configuration of IBM HTTP Server, make junction works for the transportation of application through a webserver.
• Managed Stash Repositories to pull the request from develop to master to make changes based on the Jira tickets
• Worked on setup for Puppet Agents and Puppet Master.
• Worked on Puppet to organize and execute configuration plans on servers
• Worked on modules on Puppet for its manifests on servers
• Implemented and done maintenance of the cloud infrastructure and systems
• Worked on Amazon Web Services, including EC2, S3, RDS, Elastic Load Balancing
• Worked on utilizing Virtual Private Cloud to create secure multi-tiered environment
• Co-ordinated with all the teams for the Network/Integrated Disaster Recovery drill on yearly basis.
• Monitored system performance using sar, prof, vmstat, iostat, netstat, Nagios..
• Managed and implemented changes, upgrades, security procedures and policies to the unix client infrastructure.
• Configured DNS Servers and Clients, and involved in troubleshooting DNS issues.
• Documented various regular administrative tasks and backup procedures, communicate with peer groups throughout the Company to develop best practices.

Environment: Linux 7.x/6.x/5.x, Oracle 10g, SUN Servers, SUN Fires, Linux, Jump Start, Shell Script, Autosys, Veritas Volume Manager (VVM), LDAP, EMC Storage SAN, Veritas Cluster Server (VCS), VMware servers, jboss, Websphere.

Confidential, Shelton, CT

Senior Linux System Administrator

Responsibilities:

• Deploying the Redhat Linux enterprise server as like existing versions 5.x, 6.x versions
• Creating the VM shell and pushing the operating system using the kickstart server.
• Creation of Kickstart imgaes for the different version of Redhat Linux Operating system like 5.x & 6.x
• HPblade centerC7000 hardware management using ILO console
• Creating the server profile and making the network and SAN virtual configuration using Virtual Connect in blade center C7000
• Creating the filesystems using redhat volume manager and performing the healthcheck on regular basis for all Linux serves
• Scanning the newly assigned LUNs to the serves and assigning them to volumegroup and increasing the filesystem using redhat volume manager
• Mounting & unmounting the netapp storage LUNs to the Redhat Linux servers and troubleshooting the issues enocuntered
• Creating Link aggregation (LACP) with VLAN tunneling using virtual connect (VC)
• Share uplink set (SUS) using LACP&VLAN tagging
• Creating customized Kickstart profiles for each server and making ISO to build the server
• Performance Tuning and Management for Linux/AIX server and working with the application/database team to resolve issues.
• Creating the filesystem and RAW logical volumes for the Oracle RAC based on the requirement
• Upgrading the kernel in all the Redhat Linux servers and creating initrd image to boot from the Upgraded kernel
• Migration of Redhat linux servers from 4.x to 5.x version and working with the application team to resolve the issues post migration.
• Installation/Configuration of ESXi 3.5, 4.x and 5.1 servers and applying security patches to the ESXi servers
• Managing the ESXi servers using the Vsphere client and Vcenter for managing the multiple ESXi servers
• Building the Red hat Linux server in Vmware ESX client through Vsphere client
• Storage mapping on Red hat linux and create the Volume group, Filesystems using Logical Volume manager
• Installed/Configured redhat Linux cluster 5x version & Configuring the cluster resources
• Adding storage to the cluster disks and increasing/ decreasing the filesystem in RHEL.
• Creation of Fence devices in the cluster, Creation Failover domains for the cluster and Flipover/ Failover test in between the nodes in the cluster
• Working on SAN storage on ESXI servers and assigning the LUNs to the Virtual Machines running on the ESXi server.
• Performed Vup 5.0, Sybase 11.5.1, Perl Scripting, NIS, NFS, LDAP server, Weblogic, Apache Tomcat, EMC Storage SAN.
• Working with backup team for the Legato backup & Restore, Legato client Instllation in the Redhat Linux server

Environment: Linux 6.x/5.x/4.x, Oracle 10g, SUN Servers, SUN Fires, Linux, Jump Start, Shell Script, Autosys, Veritas Volume Manager (VVM), LDAP, EMC Storage SAN, Veritas Cluster Server (VCS), VMware servers, jboss,Websphere.

Confidential, Atlanta, GA

Linux System Administrator

Responsibilities:

• Installation & configuration of SUSE enterprise server Linux 9.x and applying patches to the servers in production and in pre-production
• Creating Logical volumes& file system and increasing the filesystem in SUSE linux servers and
• Installed, Deployed Red Hat EnterpriseLinux 4.x/5.x/6.x, CentOS and installation of packages and patches for Red hat Linux Servers.
• Installation, configuration, Troubleshooting and administration of AIX 5L, 6.1 & 7.1 operating systems
• Creating customized Kickstart profiles for each server and making ISO to build the server
• Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satelliteserver, Up2Date, YUM, RPM tools.
• Performance Tuning and Management for Linux/AIX server and working with the application/database team to resolve issues.
• Creating the filesystems using redhat volume manager and performing the healthcheck on regular basis for all Linux serves
• Scanning the newly assigned LUNs to the serves and assigning them to volumegroup and increasing the filesystem using redhat volume manager
• Configuring the drivers for QLOGIC adapters and bringing the adapters to online to visible in the Fabric

Environment: Red Hat Linux 5.x/, Dell Power Edge 1800/1850/2850 servers, Intel servers, Sun Ultra Enterprise 4500, Sun Enterprise 450, Sun Enterprise 420R, Sun Enterprise 250, Sun Fire V20z servers, Dell PCs & Compaq PCs, VERITAS Volume Manager, VERITAS Netback up 5.0, Sybase 11.5.1, Perl Scripting, NIS, NFS, LDAP server, Weblogic, Apache Tomcat, EMC Storage SAN.

Confidential, Dearborn, MI

Unix Administrator

Responsibilities:

• System installation and Configuration of AIX 5.x operating system and Redhat 3.x, 4.x & 5.x servers
• UserAdministration, adding and removing user accounts, changing user attributes.
• Monitoring the CPU statistics and memory. Managed IBM PSeries servers installed with AIX.
• File system monitoring and checking error messages.
• Working with paging spaces, Creating, increase, decrease paging spaces as per requirement.
• Performed other standard system admin tasks such as system monitoring, performance usage, network support and user support.
• Configure VG’s and LV’s, Extended LV’s for file system growth needs using LVM commands.
• Working on FTP and SSH for remote administration. Monitoring server performance, disk utilization and failedlogins.
• Diagnosing and troubleshooting problems related to Operating System and all hardware.
• Patch Management. Problem determination in File systems and Logical Volumes.
• Creating and managing the default and User defined Paging Spaces.
• Creating and updating the Crontab files. NFS Administration. System Resource Controller Administration.
• Corporate client support for mission critical environments
• Responsible for 200 Linux Servers: RHEL 3.0, 4.0 & 5.x, Bash scripting for automation of tasks.
• Day to day problem handling like related to File Systems, Disk, Memory, CPU, Network etc
• Installation and configuration of many OpenSource Packages for company and Clients (SugarCRM, eGroupware, Openfire, Spark, RT, etc. ) .
• Did handle day-to-day IT functions like user/quota/permission/ACL/LVM management.
• Configuration and management of MySQL.

Environment: RHEL 5.x/4.x/3.x,VERITAS NetBackup, Sun E250, E450, Sun E3000, SunFire v440/v480/v490, Solaris 8/9, SDS 4.1, 4.2(Solstice Disksuite), VERITAS volume manager 3.5,websphere.

Confidential

Unix Administrator

Responsibilities:

• Servers Installed, Configured and Maintaining of RedHat Enterprise Linux 3.0,4.0,5.X,
• Using Logical Volume Managerfor dynamically extending and reducing partition sizes as when the need arise
• Increasing the size of the file systems
• Exposure to managing servers remotely using DRAC, ILOM, VNC
• Performing User Administration, Updating the patches for all the servers
• Performance &Capacity management. Configuring Network printers using CUPS
• Implementing Quota on file systems &ACL’s for the files & directories
• Web server’s administration and creating virtual hosts& certifications using SSL.
• Administration on Tomcat, deploying the web applications
• Worked on Xen virtualization in RHEL 5.2
• Installed and Configured SAMBA Server in Linux for accessing the shared files from the windows environment
• Configuring and Maintaining of Network File Systems like (N.F.S) and Auto mount in networks
• Installing and updating Kernel. Created and modified swap files and added swap space
• NTP server and client configuration for synchronization of timing of all the server with the NTP server

Environment: RHEL 5.x/4.x/3.x,Solstice Disksuite 4.2, NFS Servers, NIS+ Servers, VERITAS Volume Manager, Clariion CX200,