SUMMARY

• Over 8+ years of IT industry experience as a System Administrator under environment of Red Hat Enterprise Linux 3.x/4.x/5.x, Sun Solaris (8/9/10), AIX (5.x), OEL 5, Cent OS 5 and Windows NT/2000/2003.
• Strong experience in automating the system administration tasks using Perl, Python and Shell Scripts.
• Experience in building Perl modules and using of different CPAN modules Expect, CGI, DBI etc.
• Strong knowledge and experience in DNS, SMTP, Sendmail, Postfix and TCP/IP communications.
• Extensive experience in installing, upgrading, maintaining and configuring Red Hat Enterprise Linux on Dell Power edge servers using Custom and kick - start installation, and Sun Solaris Sun Sparc servers using Jumpstart installation.
• Expertise in Installation, configuring and Administration of Veritas Volume Manager 3.5, 4.1, 5 and working knowledge of Veritas Cluster Server 5.0 and Veritas Netback up 6.0.
• Experience in installation of monitoring tool, proficient in Splunk search and building the reports and alerts and configure dashboards using XML.
• Installing, administering Redhat using Xen, Oracle Virtual Machine based hypervisors.
• Experience with Puppet for configuration Management and automate tasks using Puppet.
• Strong experience in configuration and installation of Nagios monitoring tool and creating custom libraries using Perl and shell scripting.
• Experience in installation of Tomcat, Apache, Oracle, Weblogic, JBOSS, DB2 and SQL.
• Expertise in Installation, Configuration and file system management and RAID volume management through Veritas Volume Manager and Logical volume Manager (LVM).
• Experience in administration, initial setup configuration and troubleshooting in NAS/SAN
• Setup SAN environment by provisioning storage to the hosts using iSCSI and FCP protocols.
• Configuration of the RAID 1 and RAID 5 Storage using Veritas File system and Volume Manager.
• Extensively worked on configuring NIS, NIS+, NFS, DNS, DHCP, Auto mount, FTP, Mail servers.
• Disk and File system management through Logical Volume Manager (LVM) on Linux and Solaris Volume Manager (SVM) on Solaris.
• Experience in Server build using Jumpstart, NIM, Ignite and kick-start Process.
• Experience in administering VMware Infrastructure Client 3.5 and Vsphere 4.0, Xen, KVM
• Providing 24x7 technical support to Production and development environments..
• Extensive experience in UNIX performance monitoring and kernel tuning and Load balancing to ensure stable performance.
• Experience in Installation and configuration of Sudo for users to access the root privileges.
• Proficient in installation of Packages, Patches and maintenance & RPM updates on Linux.

TECHNICAL SKILLS

Hardware: Sun Fire 280R/V 480/4800/3800/10 K/12K/25K Server, Sun Enterprise 2000, 3000, 40000 4500/6500 , E10K series server, IBM RS/6000 /S80 / M80 / H70 / H50 Series server and pSeries 590/610//660/670 , DELL Poweredge 1650,2850,2950,6400, F5 load balancer.

Operating Systems: Red Hat Enterprise Linux 3/4/5, Solaris 10/9/8/2.x, Windows 98, 2000,2003, NT 4.0, AIX 5.3

Software: Veritas Volume Manager 3.5/4/5, Veritas File System, Veritas Cluster Server 3.5, Veritas Netbackup 6.0, MS-Office, Visio/MS-Project.

Servers / Services: Sendmail, Qmail, UNIX (NIS, NFS, SSH & Samba), Print, Apache, Servers, Cfengine, Puppet (Hardware & Software).

Security: TCP/IP Wrapper

Network Protocols: DHCP, DIG, DNS, SNMP, SMTP, Ethernet, IOS, netstat, NFS, NIS, nslookup, TCP/IP, and tcpdump.

Networking: NIS, NIS+, DNS, NFS, Automount, LAN, WAN, Firewalls

Programming Languages: C, ksh, bash, Perl,python,shell, awk, sed, HTML,PHP,java scripting.

Database: Oracle 10g/9i, SQL, Microsoft SQL

PROFESSIONAL EXPERIENCE

Confidential, Dallas TX

System Administrator

Responsibilities:

• Installation, Maintenance and Configuration of Redhat Linux 5.x/6.x, Solaris 10/11, CentOS Servers on HP, IBM Blade, Standalone servers.
• Creating and cloning of virtual machines, adding resources, upgrading ESX hosts, V-Motion across ESX using VMware Virtual Client 5.5.
• Installing RedHat Linux using kickstart and applying security polices for hardening the server based on the company policies.
• Installed, manually configured Sun machines through jumpstart installation on Sun Fire and Enterprise servers. Installed, configured Zones, LDOMs in Sun Solaris 10.
• Build LPAR system and Installed AIX 5.3 and 6.1 on LPAR using NIM Power 4, Power 5 systems and Upgraded Maintenance level as well.Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
• Tech and non-tech refresh of Linux servers, which includes new hardware, OS, upgrade, application installation, testing.
• Worked on Windows 2008 and 2012 servers which includes installation, adding patches, packages, volumes, performing vulnerability checks and remediation as part of SOX compliance.
• Worked on installing, configuring puppet, creating profiles, pushing new changes to the servers.
• Installed, configured, and maintained WebLogic 10.x and Oracle 10g on Solaris & Redhat Linux.
• Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
• Gathering requirements from customers and business partners and design, implement and provide solutions in building the environment.
• Installing and configuring Apache and supporting them on Linux production servers.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Preparing servers for Oracle RAC installation, which includes tuning the kernel, agent installation, adding NAS storage.
• Worked on resolving production issues and documenting Root Cause Analysis and updating the tickets using BMC Remedy.
• 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.
• Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
• Installation and configuration of VxVM 5.0 and creating disk groups, volumes, increasing volumes.
• Coordinated with the Storage, Network and Hardware teams on server provisions (HP Proliant DL385/585 G5, G6 servers, and HP BL 465C G5 blade centers).
• Worked on Openstack (Havana), which includes installing, configuring VMs, adding security groups, resources to the tenants.
• Adding servers to the domain and monitoring them using spectrum, sitescope, cacti.
• Experience with the version control software SubVersion to ensure source code and scripts and database codes are regularly checked into the tool and properly version controlled.
• Developed useful tools in Unix Shell Scripting and Perl to reduce manual work.
• Identified and fixed frequently failing scheduled jobs so thus reduced the production support efforts.
• Installation & Configuration of Logical Volume Manager - LVM, Veritas Volume Manager and Netbackup, RAID.

Environment: Redhat Linux, Solaris, NIS-NFS, Logical Volume Manager- LVM, DHCP, DNS, SMTP, SSH2, FTP, Apache, Perl, Oracle 10i, Dell Power edge Servers, Sun Sparc 5/10, KickStart Installation, SubVersion, Tortoise SVN, Sybase, Netezza, Aginity, Aqua Data Studio, Autosys

Confidential, Phoenix, AZ

System Administrator

Responsibilities:

• Administration of RHEL 5, 6 that includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Creating, cloning Linux Virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
• Administration, package installation, configuration of Oracle Enterprise Linux 5.4, Cent OS 5.x.
• Configured Sendmail for the enterprise application systems.
• Automate the daily routines using Perl, Python, PHP and Shell scripting and documenting them
• Installed and Configured Nagios and created custom libraries and configurations for alerting system.
• Experienced in other monitoring tools CA Spectrum, Cacti and Attention.
• Creating logical volumes and extending file systems.
• Worked with enterprise SMTP team to setup TLS enforcement with partners, message tracking, and reading SMTP headers and to configure email security policies.
• Installation, configure and maintenance of Splunk and deployment of SPL strings
• Experience with Splunk proficient searches, building enterprise reports and schedule the alerts
• Building Splunk Apps, dashboards with search forms and views, packaging and distribution.
• Installing, configuring, custom building Oracle10g, Oracle RAC 11g and preparing servers for database installation which includes adding kernel parameters, software installation, permissions etc.
• Experience with implementation and maintain SQL cluster for the production environment. Implemented SQL server management studio for configuring, managing and administering the SQL Cluster.
• Worked on creating disk groups, volumes, importing disk groups using Veritas volume manager 5.1.
• Installing, configuring, administering Veritas Cluster Server 5.0, creating service groups, adding resources, enabling attributes, testing fail-over.
• Installing, configuring, administering Apache and supporting them on Linux production servers.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Worked on Weblogic 10.3 including installation, configuration and with integrating Apache, configuring domains, admin and managed servers for applications to be deployed.
• Expertise in Linux backup/restore with tar including disk partitioning and formatting.
• Created the web interfaces to create user portals using Apache, Perl, CGI, HTML, PHP and Java script.
• Organized various meetings with teams to track their requirements as inputs to get this done and designed the plan/steps involved.
• Provide 24x7 support for customer identified issues as a part of on call rotation.

Environment: Red-Hat Linux Enterprise servers (Dell Power edge Servers R610, R710), Sun 280R/480R, HP, Sendmail, Perl, python, PHP and Shell Scripting, XML, weblogic Oracle DB, SQL and Microsoft SQL,AD, LDAP.

Confidential, Irving, TX

Linux Administrator

Responsibilities:

• Installation, administration, configuration of RHEL 4/5, Cent OS including package management, patch management, regular system administration tasks.
• Installed RHEL on bare metal servers and virtual machines using kick-start and hardening the servers.
• Configure Sendmail on the servers for masquerading and rewriting the addresses
• Creating and cloning virtual machines in VMware environment using Virtual Infrastructure client 3.5 and Vsphere 4.0.
• Creating logical volumes, extending the file systems using both LVM and VxVM 4.1.
• Perform daily maintenance routines on Linux servers, monitoring system access, managing file space and tuning the system for optimum performance.
• Installation and maintenance of Splunk and create SPL commands and reports.
• Experience in administering VMware Infrastructure Client 3.5 and Vsphere 4.0, Xen, KVM
• Experience in Puppet for configuration management.
• Respond to all UNIX systems problems 24x7 as a part of on call rotation and resolving on a timely basis.
• Modifying, Writing scripts using sh, ksh, bash and Perl for day-to-day administration.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Administration, package installation, configuration of OEL 5.4 and preparing the servers for Oracle RAC installation and adding nodes to the cluster.
• Updated DNS configuration based on the new servers that are rolled out.
• Configured Cfengine policy in Linux environment.
• Worked and performed data-center operations including rack mounting, cabling.
• Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
• Worked on various applications and improving their performance by performance tuning and analysis.
• Responsible for change management, troubleshooting and resolution of server issues for end users support.
• Installing and configuring Apache and supporting them on Linux production servers.
• Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
• Adding servers to the domain and monitoring them using nimsoft, cacti, sitescope.
• Assist System Administrators with various support issues.
• Writing shell and perl scripts for Automated Back- ups and Cron Jobs.
• Monitored server and application performance & tuning via various stat commands (vmstat,nfsstat, iostat etc) and tuned I/O, memory, etc.

Environment: Red-Hat Linux Enterprise servers (HP Proliant DL,ML Series, IBM p series,x series, Dell Poweredge Servers R610, R710), SAN(EMC, Hitachi), NAS (Netapp), BladeLogic, Veritas Volume Manager, Veritas Clusters, Sun Enterprise Server(E2900, E4500, E6900), Perl and Shell programming

Confidential, Minneapolis, MN

Linux/Unix Administrator

Responsibilities:

• Installing, configuring and updating Red Hat Linux 3/4/5 and Cent OS.
• Designing System Requirements, Designing Storage requirements, Configuration Management/Change control/Release management.
• Installing Veritas Volume Manager and configuring Disk Groups, Volume Groups and Logical volumes to manage the storage resources.
• Managed the storage arrays like Netapp, EMC Clariion, Symmetrix in SAN and NAS environments
• Worked on quarterly patch management using proxy server.
• Package administration to keep the servers updated with the patches and that implementing packages developed for deployment.
• Cabling, racking HP, IBM Blade and standalone servers to install OS.
• Monitored system activities and fine tuned system parameters and configurations to optimize performance and ensure security of systems.
• Installation, configuration and administration of VMware, Zones and Containers.
• Installed and implemented Samba/DNS / NIS / Automount / NFS/ sendmail on the Linux servers.
• Installed and Configured SSH for secured access on Redhat and Solaris Systems.
• Installing, configuring various software applications and packages Apache, Oracle etc.
• Experience in installing, integrating, tuning and troubleshooting Apache and Weblogic application server.
• Implementing NIS and DNS naming services and administering the public DNS servers.Monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Tuning the Kernel parameters for the better performance of applications like Oracle, WebLogic etc.
• Modifying/ Writing scripts using sh, ksh and bash for day-to-day administration.
• Creating, Deleting and managing user database and their respective directories.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Worked on preparing the servers to be SOX compliant during audits.
• Adding servers to domain and managing the groups and user in AD, installing and configuring sendmail.
• Custom build of Windows 2003 and Windows 2008 servers which includes adding users, SAN, network configuration, installing application related packages, managing services.
• Performing backups of Production, DIT and Development servers and applying required patches.
• Setting up Cron jobs for the user to deploy scripts on production servers.
• As a member of the team, monitored the VERITAS Cluster Server 4.1 in SAN Environment.
• Troubleshooting day-to-day server related issues and problems in terms of hardware, operating system, applications and network.
• Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• On-call and system support providing problem determination and resolution for installed systems software base and Data center p-series hardware.

Environment: Red Hat Linux, Solaris, Windows 2000, NFS, LVM, Veritas Volume Manager 4.0, DHCP, DNS, SMTP, SSH2, Apache 2.0, System 5 Packaging, Perl, Oracle 9i, 280R, E5500, 6500, K580,Dell Power edge servers R610, Shell programming

Confidential, San Diego, CA

Linux Administrator

Responsibilities:

• Installation, Configuration, Maintenance and Administration of Red Hat Enterprise 3/4 using Kickstart
• Applied patches on all Linux Boxes from common repository using RPM.
• Worked on installation of Power path on all Linux boxes.
• Configured and installed Auto mount and Jumpstart.
• Administrated DHCP, SMTP, DNS, NFS, NIS and Samba services in Linux.
• Responsible for Connectivity Issues among various Servers and Switches and also responsible for installation of various hardware components on various servers.
• Troubleshooting Day - to-Day issues with various Servers on different platforms.
• File system Administration, Setting up Disk Quota, configuring backup solutions on SAN/NAS storage.
• Responsible for patches for the operating system, building startup shell scripts, managing the automation of CRON jobs and managing file systems.
• Writing scripts using sh, ksh and bash for day-to-day administration.
• Troubleshooting logon problems, boot process and printing.
• Responsible for designing High Availability Solutions for different applications, using VERITAS Clusters/ Storage Foundation Suite.
• Reconfiguring Consoles, NIC on the servers and worked with SAN migrations team to bring the EMC disks online.
• Managed Disks and File systems using LVM on Linux.
• Monitored server and application performance & tuning via various stat commands (vmstat, nfsstat, iostat etc) and tuned I/O, memory, etc.
• Worked with Linux, SAN, Oracle Database, and Network teams to ensure the smooth relocation of the servers.

Environment: Red Hat Linux AS3.0/ AS4.0/ AS 5.0, VERITAS Volume Manager, VERITAS Clusters, VMware, Hitachi Disk Array, Apache 2.0, NFS, Software RAID

Confidential, Long Island, NY

Linux/Solaris Administrator

Responsibilities:

• Installation, Maintenance and Configuration of Computational Servers with corresponding and associated software on Linux and Solaris Servers.
• Kernel upgrades for Linux and Solaris.
• Configured Sendmail for the organization needs and solve customer identified problems
• Installation, Configuration, Maintenance and trouble-shooting more than 250 end user desktops.
• Creating NFS File System between different OS Platforms.
• Implementation and Management of Disk Quota on Linux and Solaris Servers.
• Installation configuration and Administration of Mail Server - Qmail, Sendmail on Linux Servers.
• Installation & Configuration of Logical Volume Manager - LVM, Veritas Volume Manager and Netbackup, RAID.
• Installation and Configuration of Oracle10i on Linux server.
• Planning and performing backups
• File transfer across systems using RSYNC over SSH.
• Configuration and Implementation of Security Systems with Firewall.
• Administration of Proxy Server, SSH, FTP Servers Administration.
• Configuring LDAP, DNS, NFS-NIS, Nagios and SAMBA servers and clients
• Wrote Scripts with Shell and PERL for User Management and Administration
• Automated Installation with Kickstart using floppy, cd-rom
• Attended Workshop on System Security, SAN, NAS.

Environment: Redhat Linux, Solaris, NIS-NFS, Logical Volume Manager- LVM, DHCP, DNS, SMTP, SSH2, FTP, Apache, Perl, Oracle 10i, Dell Power edge Servers, Sun Sparc 5/10, KickStart Installation

Confidential,

Linux/Solaris Administrator

Responsibilities:

• Installing, configuring and upgrading Redhat and Solaris 8 Servers.
• Installing and partitioning disk drives. Creating, mounting and maintaining file systems to ensure access to system, application and user data.
• Installing, configuring and administering NIS master server and NIS slave server.
• Installing & administering NFS services using auto mounter, NFS, Share and DNS.
• Day to Day tasks on VERITAS Volume Manager.
• Regular disk management like adding/replacing hard 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.
• Scheduling the daily/weekly/monthly backups.
• Patching up the system to the latest version as per the recommendations.
• Patched management and regular system updates.
• Hard disk and storage allocation and management.
• SENDMAIL configuration and administration, testing the mail server.
• User administration, management & archiving.
• Troubleshooting the network issues and response problems
• Creating new file systems, managing and checking data
• Consistency of file systems.
• Writing Shell Scripts for automating and testing the code.
• Scheduling full and incremental backups using NetBackup on daily, weekly and monthly basis.

  Environment: RedHat Linux,Solaris, Windows, Veritas Volume Manager, DHCP, NIS, NFS, Sun E220R, Sun 420R, Dell Desktops.