SUMMARY

• Over 7+ plus years of experience working in IT Industry, with expertise in the areas of implementing and supporting server/client environment consisting multi - operating systems.
• Strong experience in Design, installation, configuration, maintenance, tuning and troubleshooting of servers running on RedHat enterprise Linux 6.x/5.x, IBM AIX 6.1/5.x, OEL 5/6, SUSE9, 10, 11, Widows 2003, 2008 R2, 2012, VMware ESX/ESXi 3.x, 4.x, 5.x.
• Installing, upgrading, and configuring RHEL 3/4/5/ 6 using Kickstart and RedHat Satellite server.
• Responsible for setting up node clusters using Oracle RAC and Veritas RAC for RHEL servers.
• Experienced in Bash & Korn shell scripting automation.
• Experienced working with Enterprise backup/restore solutions.
• Experience with OpenSSL PKI solution.
• Build automatic provisioning system with kickstart and Puppet.
• Experienced working with CHEF configuration management.
• Experienced setting up VMware and virtualization technologies, VCenter, deploying virtual machines, cloning, snapshots, templates, datastores, VLANs.
• Expertise in Systems Administration, Information Analysis, Server Deployment and support.
• Design, implement and support server migration from Unix to Linux.
• Troubleshoot the issues at server level (Physical & Virtual).
• Enterprise Systems Architecture, System Backups, Restore/Recovery, Clustering and Load Balancing concepts.
• Good experience in setting up of RAID0, RAID1 (mirroring) and RAID5 for data redundancy.
• Experience in working with Cisco SAN fabrics and EMC storage devices, including Centera, Clariion.
• Experience in Migrations using different software’s like EMC open migratory, LVM, and rsync.
• Experience working Red Hat GFS and Veritas Cluster File systems.
• Coordinated with DBAs to tune kernel for Oracle installations on Red HatLinux.
• Proficient in System Software Installation, Configuration & Administration of NFS, NIS, DHCP, DNS, WebSphere, HTTP Server, Apache, Tomcat and Samba server configuration and management.
• Experience in Network Troubleshooting, SAN, NAS connectivity issues and Server Hands-On for DELL R710, HP Proliant DL-380 G4/G5, & DL-580 G6/G7.
• Technical professional with Management skills, excellent business knowledge and strong communication skills.
• Experience in IBM VIO Server and Client Implementation.
• Experienced system Administrator with IBM Pseries, VI/O server, created virtual LPARs and DLPARs using HMC, implemented micro-partitioning, virtualization and shared Ethernet.
• Experience in Hardware management console HMC administration and NIM installations of LPARs.
• Carried out performance tuning, generation and analyzing of thread dumps, heap dumps to pinpoint application issues.
• Supported various migration activities as a part of Datacenter Migration project.
• Configuration of RAID, building RAID support to Linux kernel, Installation of DHCP, DNS, LVM, NFS, NIS, SSH, Linux firewall, Squid proxy, Apache.
• Experience with Linux kernel tuning, with various memory and CPU configuration.
• Scripting in Bash, python for various alerts and monitors.
• Designed, Installed and ConfiguredVMwareESX/ESXi within vSphere 3.5, 4,4.1,5 andVMwareView 4.5, 4.6 environments, Consolidated Backup, load balancing, DRS, HA, FT, DPM, vMotion
• Experience with enterprise backup systems and disaster recovery operations; familiarity with SAN technologies.
• Experienced with migrations such as vMotion& Storage Migration.
• Managed ESXi Host patches by downloading and installingVMwareupdate manager in the vCenter.
• Extensive knowledge in System Administration, Installation, Upgrading, Configuration, Troubleshooting,
• Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on LINUX and UNIX Systems.
• Built and configured Templates and deployed Virtual Machines through templates
• Expertise with IP sub-netting, VLANs, Load Balancing, and High Availability (HA) architectures.
• Experience in the V2V and P2V migration of Physical servers toVMwareESX hosts
• Experience in Windows clustering Administration and troubleshooting.
• Knowledge of maintaining Business Continuity and performing Disaster Recovery (DR) usingVMwareSite Recovery Manager (SRM).
• Followed agile methodology in development of scripts & automation as in when Supported required.

TECHNICAL SKILLS

OS: Red Hat Enterprise Linux 6.x/5.x, CentOS 5.x, 6.x, IBM AIX 6.x/5.x, Windows 2003/2008 R2 and 2012 Servers.

Virtual Environment: VMware ESx, ESxi 3.x, 4.x.5.x, vcenter server

Hardware: HP, DELL IDRAC, IBM, Cisco UCS, Netapp, EMC

Middleware Application Server: WebSphere Server, Apache, WebLogic.

Servers: DNS, DHCP, NIS, NFS, Apache, Squid, Samba, Send Mail, Q-Mail, FTP, Build 3055.

Monitoring:

Network Diagnostic Tools: Nmap, Tripwire, lsof, tcpdump

Networking: F5, Conventional LAN, STP, VLAN, VTP, Wireless LAN (WLAN), TCP/IP and IP address sub-netting, WAN over leased-lines and ISDN.

Programming: C, UNIX - Shell Scripting, python, SQL.

PROFESSIONAL EXPERIENCE

Confidential, Norwalk, CT

System Administrator(Linux/VMware)

Responsibilities:

• ManagingLinuxInfrastructure involves day-to-day maintenance of servers and troubleshooting.
• Provisioning Red Hat EnterpriseLinuxServer using PXE Boot according to requirements.
• Performed Red HatLinuxKickstart installations on Red Hat 6.x/5.x, performed Red HatLinuxKernel Tuning, memory upgrades.
• Building the host using the Kick start and configuration of LVM and maintaining them.
• RPM and YUM package installations, patch and other server management.
• Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
• Installing and configuring Apache and supporting them onLinuxproduction servers.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Regular disk management like adding / replacing hot swappable drives on existing servers/workstations, partitioning according to requirements, creating new file systems or growing existing one over the hard drives and managing file systems.
• Deployed File System in Veritas.
• Experience in Migrations using different software’s like EMC open migratory, LVM, and rsync.
• Experience working Red Hat GFS and Veritas Cluster File systems
• Performed different configuration under Veritas for Oracle agents.
• Performed boot from SAN installs of RHEL6.x and OEL 6.x on Unified Cisco Servers (UCS) blade servers.
• Installed configuredLinuxclustering for High availability for critical applications.
• Installed and configured Nagios/NRPE to monitorLinuxservers.
• Manage daily system administration cases using BMC Remedy Help Desk.
• Performed scripting on Perl and shell for monitoring and scheduling the Jobs.
• Migration of LDAP and up gradation of RHEL 5 to RHEL6.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage.
• Extensively used LVM - created VGs, LVs & File systems.
• Configuring the FTP, DHCP, DNS and troubleshooting them.
• Installed and configured Spacewalk/Satellite Server to serve as Patching, Provisioning and configuration management for allLinuxservers.
• Server hardening, checking I/O andMemory performance.
• Responsible for start-up and shutdown of the boxes and services.
• Adding and configuring disks and creating new file systems.
• Responsible for, NFS, SAMBA, NIS, SSH, FTP, NIS, Apache, Tomcat, Send mail, DNS servers Installation andconfiguration.
• Performance monitoring with Ksar, iostat, vmstat, mpstat and Other Tools.
• Managing internal DNS server records addition and deletion.
• Application readiness/OS checkpoint. Install & config oracle 10g and coordinating with the oracle team.
• Troubleshooting of Veritas Volume manager and Sun solaris manager.
• Setup LVM. Install OS packages and patches, break/fix support. System security management. Worked on OS upgrade plan for Solaris on development and production servers.
• Perform daily administrative tasks, including log reviews, account, group, system accessibility issues, and server software maintenance.
• Production Support activities based on incidents to solve end user issues related to their accounts, orders as in when required.
• Implemented Clustering, Performance tuning and troubleshooting of WebSphere Application Server 7.0/6.x.
• Provided load/stress, Performance testing and troubleshooting on issues such as Out of Memory, 100% CPU Usage, hung Thread sessions, session replication.
• Responsible for maintaining completeVMwareinfrastructure for the customer.
• Involved Datacenter server migration and SAN storage migration Activities.
• Responsible for upgrading the Virtual Machines,VMwareESXi hosts and vCenter servers in the organization.
• Installed and configuredLinuxvirtual machines on VMware infrastructure.
• Created New Virtual Machines, cloning VM, DRS and Snapshots.
• Created and managed templates in VCenter.
• Server migration from Physical to Virtual (P2V) and Virtual to Physical (V2P).
• Installation and configuration of Red HatLinuxon VSphere and VMware ESX.
• Created and managed Standard and Distributed Switches (dvSwitch) in the vCenter servers for making use of best network design and stability across the vCenterservers.
• Responsible for performing monthly patching on infrastructure servers.
• Took active part in troubleshooting vCenter and ESXi issues and also in system hardwarefailures.
• Responsible forVMwareand ESX patch management using vCenter update manager.
• Responsible for upgrading the Hardware version andVMwareTools version on the Virtual Machines.

Environment: Red Hat Linux 6.x/5.x, HP ProLiant, DELL IDRAC, Cisco UCS, solarwinds, Zendesk, Vcops, Satellite Server, WebSphere, Apache, Tomcat, Windows 2008 R2, 2012, VMware ESXi 5.x, update manager, DRS, HA, vmotion, svmotion, Distributed switches, Data center Migration.

Confidential, Baco Raton, FL

System Admin(Linux, VMware)

Key Responsibilities:

• Installation, maintenance and regular upgrades of Red Hat Linux Servers and Performing Linux Kick Start installation, RAID & LVM Implementation.
• Installed, configured and maintained HTTPD server for Intranet specifications.
• Installation, Configuration and Troubleshooting of Linux and Windows Servers.
• Ensured and maintained the stability of POP, POP3, SMTP, Sendmail & IMAP mail servers.
• Installing and Configuring Red Hat Linux in VMWare Environment and VPN clients.
• Implementing Security using TCP wrappers, PAM & Iptables.
• Configuring Samba, NFS, DHCP server in Linux & Windows.
• Installed, configured and supported web related software such as Reverse and Forward proxy using Apache and IBM web servers, SQUID, PHP, onLinuxsystems.
• Responsible for various tasks of UNIX User Administration of creating users, managing user permissions & Security, implemented SUDO to allow non-root users ability to execute specific application related commands and services.
• Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
• Monitored server and application performance & tuning via various stat commands (vmstat, nfsstat, iostat etc) and tuned I/O, memory, etc.
• Monitoring CPU, memory, iSCSI disks, disk controllers, physical disk, HW and SW RAID, multipath, file systems,
• Configuring FTP server, Apache Web Server on Red Hat Enterprise Linux and Proxy Server (Squid) on Red Hat Enterprise Linux.
• Configuring and administering Send mail with dovecot package for IMAP & POP3.
• Preparing binary RPMs from the source code to suite our architectures.
• Configuring RHEL as Router by enabling IP forwarding.
• Preparing the centralized log server for all Linux clients.
• Preparing centralized installation server comprising FTP, Webserver and NFS.
• Installed and configured Apache HTTP Server, IHS and WebSphere Application Server and also configuration of Virtual Hosts for Apache HTTP Server.
• Experience with LDAP, SSO (Single Sign On), Web Agent configuration, VIPs (Virtual IP address), in complex clustered environment.
• Installed and configured vCenter update manager for installing ESXi patches and also to upgrade ESXi Kernel.
• Extensively used VMware vCenter to create virtual machine clones, vMotion of virtual machines and to create snapshots.
• Using Hot Plug feature for increasing the performances of virtual machine.
• Created and Troubleshooting is performed on Virtual Network, ESXi and Virtual Machines.
• Working on troubleshooting the triggered alarms generated fromVMware vCenter Server
• Responsible for performingVMwarepatch updates.
• Upgraded the vSphere ESXi servers on the HP blade servers and CISCO UCS servers.
• Responsible for migrating the datacenter and converted the physical servers to virtual servers using convertors.
• Experienced with Live migration, Cold migration, vMotion& Storage vMotion.
• Responsible for taking the snapshots for backup before modifying or upgrading the VMs.
• Followed agile methodology in development of scripts & automation as in when Supported required.
• Worked as a part of 24/7 on-call support for production and non-production environments.

Environment: Red Hat Linux 6.x/5.x, CentOS 5.x, 6.x, Windows 2008 R2, VMware 5.x, NFS, Dell Servers, Cisco UCS,, Apache, Tomcat, Solarwinds, monitoring, VMware 5.x, vmotion, storage vmotion.

Confidential, Anaheim, CA

System Administrator (Linux, VMware)

Key Responsibilities:

• Installing, configuring and support of RHEL 5.x.
• Involved in installation, configuration and administration of AIX 5.3/5.2 on Pseries server .
• Performed User administration to create and maintained user accounts onLinux Systems with controlled elevated access through SUDO and ACL.
• Rolled out solution for security enhancements on weekly basis to mitigate security vulnerabilities on theLinuxservers. Worked on security remediation involving installation of patches and disabling unnecessary services.
• Expertise inLinuxbackup/restore with tar including disk partitioning and formatting.
• Creating and Administrating File systems on Red HatLinux.
• Installation and Configuration of VMWARE ESX servers and Created RHEL Guest VM’s for Dev/ Test and production environment.
• Installed/ upgraded patches, firmware, MP, GSP, BIOS and security (Kernel) patches for all HW & OS’s in installed infrastructure.
• Used various networking tools such as ssh, telnet, rlogin, ftp and ping to troubleshoot daily issues. Also responsible to design, implement and maintain DNS, NFS and FTP services.
• Creating and maintaining user accounts on NIS environment.Scheduling the Jobs using CRON tab.
• Worked with Veritas Volume Manager(VxVM).
• Created RAID 1, 01 configurations on hardware RAID devices and RAID10, 5 using SVM, LVM, VxVM.
• Performed Storage Management to assign storage toLinuxservers over Fiber Channel with Multipath and managed LVM to create/modify Volume groups, LVs, filesystems and disk mirroring.
• Diagnosed and troubleshoot software and hardware related problems.
• Installed and deployed operating system and security related patches and fixes.
• Applying online updates, patches & service packs for Linux SuSE & RHEL.
• Installed AIX and performed the operating system upgrade flawlessly. Updating the existing applications and adding new ones without incident.
• Developed Shell scripts for automating the batch jobs.
• Involved in Storage management, LVM, File system management, User account management, data backups and user’s logon support.
• Involved in development & testing of shell scripts to automate regular & routine activities.

Environment: UCS-Blade Center & Racks), ILO, KVM, RHEL 5, GPFS, VMware-vSphere, Oracle RAC, AIX 6.1/5.3, VIO 2.2.2.1, App Servers, HTTP servers, TSM, and Oracle 10g DBA, WebSphere, Apache Webserver, Shell, Jython Scripting and WSADMIN, SSL, LDAP.

Confidential, Reston, VA

System Administrator (Linux, Windows)

Key Responsibilities:

• Administered Red Hat Linux, AIX and Windows servers. Administration involved installation, configuration, evaluation, implementation and support
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands. Maintained availability, increased capacity & performance of production machines by upgrading their hardware (disks, CPU, memory, IO board, power cooling unit, motherboard etc) & firmware.
• Troubleshooting of all kind of OS related and hardware related issues on the Linux servers
• Managed file permissions & ownership for important directories & files.
• Implemented DNS, NFS, NIS, Auto mount networking services.
• Created logical partitioning LPAR and dynamic logical partitioning DLPAR defining virtualization on IBM Pseries servers using HMC.
• Installed and configured RedHat Enterprise Linux. Installed and configured NIS, DHCP, BIND (DNS) services. Performed file system tasks using LVM, RAID and swap space concept. Installed and configured NFS and SAMBA server. Also performed user administration in complex high end server environment.
• Worked on the Linux Client OS.
• Responsible for handling L1 tickets.
• Working onVMwareenvironment for Creating vm’s and troubleshooting.
• Provisioning environments for projects.
• Creating VM’s and installing the OS.
• Performing data center migration by moving servers from different locations to central data center.

Environment: RHEL 4.x, 5.x, IBM AIX 5.x, 6.x, Windows 2003, 2008 R2, Solaris 8, Oracle, DB2, and Apache web server, user, Active directory Systems, Remedy.

Confidential, Houston, TX

System Admin (Linux, Windows)

Key Responsibilities:

• Configuring IP-Tables & TCP - Wrappers for providing security over network (both Intranet & internet)
• Configuring & troubleshooting PAM for secure ISP network.
• Troubleshooting booting problems using GRUB.
• Providing solution based on LVM & software RAID (RAID Level 0, 1, 5)
• Managing Quotas for both users & groups.
• Setting up user accounts, Permissions and Passwords.
• Secured network resources with shared folder permissions, implementing file security system.
• Install Microsoft Patches on Windows 2000/2003 servers using Windows Update.
• Maintenance of clusters server, file and print server and backup servers.
• Making sure of available free disk space on C drive.
• Allocated space and Memory when required.
• Install and Configure network printers and File servers.
• Installation, configuration of IIS, DNS, DHCP.
• Responsible for Domain controllers throughout organization.
• Managed Remote Servers through Terminal Services Manager.
• Maintained corporate DNS system.
• Responsible for daily & weekly back-up & restore.
• Responsible for securing network using different port scanners, packet sniffers, Vulnerability scanners, password checking tools, log analysis & monitoring tools.
• Installing, configuring, tuning, troubleshooting & updating of H-Sphere Servers installed on Redhat linux servers for web hosting environments
• Set up monitoring system to monitor all servers.
• Advance warning of any potential problems that will bring server down transferring websites between servers.
• Bring up servers, which are down.
• Creating, terminating, modifying, locking user accounts - basic/advance user management on Linux Servers.
• File system maintenance for consistency checks and free disk space.
• Administering the Backing up and restoring the files and file systems (Using regular full and incremental backups
• Trouble shooting DNS related issues on the server/domain registrar.
• Ensuring maximum uptime of all production servers server.

Environment: Cisco switches, Routers, IP-Tables & TCP Wrappers, PAM, RAID, Log Analyzer, RedhatLinux 8.x/9.x/10.x, Redhat Linux9, 10, RHEL 4.0, DNS, DHCP, Apache, Sendmail, FTP,SFTP, Security,Windows 2003, 2008 R2, User Administration, LDAP.