SUMMARY

• Over 7 years of System and Network Administration, experience on various OS platforms includingRed Hat ENT Linux, IBM AIX 3.5, 4.3/5L, Suse Linux, UBUNTU, FEDORA, Cent OS and Windows Server 2003/2008/2010.
• Experience in installing Operating Systems using DVD and Network.Experience inJumpstart/Kickstartinstallations forRed Hat LinuxandAIXServers.
• Involved in installation, configuration and administration of RHEL 3.x/4.x/5.x/6.x Servers.
• Involved in upgradingILO Firmware, BIOSand troubleshootinghardware issuesfromILO.
• Worked asData Center Managerand has expertise inRacking, Physically insertingRAMand replacingfaulted Disks.
• Involved in migration and consolidation of Unix/Linux Servers inDevelopment, StagingandProductionEnvironments.
• Expertise in creating localLDAP usersand resolvingUser Permissions. UpdatedPatches and Packagesusing Automation tools and Commands.
• Performed all theMaintenanceandAuditing tasksduring Maintenance window. Expert in following all theEnterprise Process and ProceduresduringChange Management, Maintenance windows, migrations and upgrades.
• Experience in virtualization Products likeVmwareESXi Server 4.x/5.1/5.5 vSphere 5.1, 5.5.
• Experienced in creating and maintaining users, profile, security rights, disk space and process monitoring.
• Experienced in file system administration, resolving system errors, crashes and file system errors.
• Experienced in Implementing NIM for AIX System Installations and Upgrades.
• Possess hands on experience with theVmware ESX Server, Vmware Virtual Center, Vmware HA, Vmware DRS, and VmwareConsolidated Backup (VCB).
• Creatingnew file systems, mounting file systemsandunmountingfile systems.
• Installation, Configuration and administration ofIBM Web Sphere Application ServerV6.0/6.1,Weblogic 5.1, 6.1, 7.0, 8.1,apache 2.x/tomcat,samba&send mail,Web Sphere Application ServersonRHEL, Solaris, AIXalong with DB2 UDB & IBM HTTP server with SSL for secure communication & providing technical support to users.
• Closely worked with application Admins for websphere, web logic, IIS installation and connection trouble shooting.
• Security Configuration, Network, System Monitoring on UNIX based Servers - Basic hardening of the system and network security, attaining the goal of allowing only the valid users/ports into the system.
• Experience in Managing various Network related tasks such asTCP/IP, NFS, DNS, DHCP and SMTP.
• Configuring and AdministeringNIS, LDAP and FTPon Linux and Sun Solaris server environment.
• Experienced in writingShell scriptsusingksh, bash.
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure.
• Experience inTroubleshooting Hardware, Storage, Application Bottlenecks. System Recovery, Crash dump analysis andPerformance Tuning.
• Experienced in different tools formonitoring the health checkups for machines like CMC and Nagios version 2.10.
• Managing user accounts, system security, change management, documenting and following Company Standards.
• Experienced in supporting7x24 productioncomputing environments, on-call and weekendsupport.

TECHNICAL SKILLS

Operating Systems: Linux (Red Hat 4.x, 5.x, 6.x Suse (SLES 9/10)),, IBM AIX 5.x, 6.1, HP-UX 11.xx, 11iv3, Windows NT4.0, Windows 98/2000/2003/2008/2010 XP/VISTA.

Hardware: HP DL360, 380,DL385 G8/G7/G6/G5, IBM - F-SERIES AND P-SERIES, IBM RS6000, Blade Servers. Data Centre Servers - E250, E450, E3000 and E3500, M4000,T2000, T5120. Tape Libraries - Sun StorEdge L20/L40/L60, L180,Storagetek’s 9840,6540,STK 700,L-1400, SE-6920 A/B/C Fibrechannel, Arrays - Sun StorEdge 3130, A1000/D1000, EMC DMX 800 and 1000

Tools: Tivoli Storage Manager 5.x, sendmail, POSTFIX. CMC (Central Monitoring Console), Nagios.

Languages: Shell scripting, PERL, C, C++, PHP, JAVA, PL/SQL, HTML, JavaScript, J2EE, JSP, Servlets.

Databases: Oracle 11g/10g/9/8, Sybase 11.5.1, POSTGRESSQL, MYSQL, MSACESS

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

Web/Applications Technologies: Lotus Domino 5 / 6, Apache http 2.4/2.2/2.0, Apache Tomcat 5.5/6.x, Weblogic 8.0/9.0/9.1/9.2/10.3 , WebSphere 5.0/6.0/6.1, JBoss 5.0,4.0, IPlanet, IIS, ESX 2.5.1, 25.2, 3.0, 3.5, IBM Http Server 6.0.

PROFESSIONAL EXPERIENCE

Confidential, Phoenix AZ

Linux System Administrator

Responsibilities:

• Administration of over 400 RHEL 5.x/6.x servers which includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual servers.
• Responsible for managingRedhat Linux productionand development environment servers
• Creating, cloning Linux Virtual machine templates usingVMware 5.x, vSphere 5.xand migrating servers between ESX hosts.
• Installing Redhat Linux usingkickstartand applying security polices for hardening the server based on the company policies.
• Managing systems routine backup, scheduling jobs like disabling and enablingcronjobs,enabling system logging, network logging of servers for maintenance, performance tuning, testing.
• Worked and performed data-center operations including rack mounting, cabling.
• Worked on HP modelsHP DL360, 380,DL385 G8/G7/G6/G5
• TCP/IP Configuration like assigning IP addresses, configuring network interfaces, assigning static routes, hostnames etc.
• Automating tasks usingPuppetmodules.
• Hardware support and replacement of the faulty units.
• Troubleshooting various issues onssh, ftp, telnetetc.
• Implementations of automatic secureSSH Login, User and Group administration.
• Managing DNS for external and internal domain &Sendmail Relay Server for outgoing mails.
• Assisted Oracle DBA team withmigration DB from AIX to Linux RACenvironment. Linux Oracle.
• Enterprise servers installation and advanced configuration (Oracle RAC) with IBM 5.x series hardware.
• Installation of local yum repository and package administration using yum and rpm.
• User, Group management for all the Linux Servers.
• Setup and management ofSFTP serverfor file transfer services.
• Installation and configuration ofOracle HTTP server(OHS).
• Network Interface configuration.
• Integration of Linux servers to authenticate using Windows Active Directory using Samba.
• Server hardening and security configurations as per the client specification.
• Adding andcreating swap spaceduring runtime.
• Installation and configuring Windows virtual machines using Windows Server 2008 R2/2010.
• Installing and configuration of Windows Active Directory.
• Documentation of Linux environments and configurations.

Environment: Oracle Linux 5/6, Oracle VM Manager 3.1/3.2, Oracle Enterprise Manager(OEM), Windows Server 2008 R2/2010.

Confidential, Irving, TX

Linux Systems Administrator

Responsibilities:

• Provided24 x7 on-call supportsin debugging and fixing issues related toLinux,Solaris,HP-UXandWebSphere Application Servers.
• Installation/Maintenance of Hardware/Software in Production, Development & Test Environment as an integral part of the UNIX RHEL/ SOLARIS/HP-UX/AIX) Support team.
• Installed/Configured/Maintained/Administrated the network serversDNS, NIS, NFS, SENDMAILand application serversApache, Websphere, Jboss, Webogic, Oracle E-business suiteandSambaonLinux.
• Involved in Addingnew disks,formatting,partitioning,disk space allocation,monitoring system performance,system tuning,server hardeningandcrash recovery issues.
• Implemented Virtualization usingVMwareESX Server in Linux on HP-460C (Gen 6/7/8) Blade, Dell-2950.
• Responsible forInstallation,configuration,Maintenance,Deployments,Monitoring, performance tuning, JVM Load/Stress TestingofWebSphere App Server(WAS) 6.1on AIX and Solaris.
• Performed troubleshooting on Java applications usingWeb Sphere App Server(WAS) logs,traces,Log Analyzer, Resource Analyzer/Tivoli Performance Viewerin production environment.
• Implemented security in systems and network for all Sun Enterprise Servers & Desktop Servers.
• ImplementedSUDO, SSHand other security tools and implementedSOX (Sarbanes Oxley) security compliance.
• Administered file system and volumes usingVeritas Storage Foundation,Logical Volume Mangeron Linux.InstalledandConfiguredVeritas Volume Manager for Development, Test and Production environments.
• Involved in Configuring/troubleshooting ofinternet firewall,protocol firewall,DMZ zone,Proxy ServersandTrusted zoneand Supported groups responsible fordisaster recovery,monitoring data center backups, data center migrations (P2V)andtroubleshootingBackup errors.
• Key participant inimplementation and integrationof three new data centers including physical, logical and application level testing and support and developed and executed test plans forVeritasClusterwithNetappSAN.
• Package management like Install, remove and update and querying packages using RPM tool.
• MaintainedLoad balancing,High availability,Failover functionalityandDisaster recoveryincluded changing IP address of the web and app server machines, which caused change in thevirtual hostand http transport configurations.
• Monitoringof space availability on eachfile systemusing theShell Scripts.
• Monitored the performance of the system usingps, prstat, vmstat, mpstat, perfmeter and iostatto check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.
• Worked in environment containing Solaris zones/containersand involved extensively in trouble shootingthe issues by finding out root causes, analyzing core dumps and resolved system crashes.
• Supporting servers with Oracle 10g and MySQL Databases, co-coordinating with DBA’s for Kernel Tuning and performance monitoring.
• Responsible for configuringPostfix mail relays with Mail Exchangers, Bind DNS Server and clients, SNMP v3andNTP relays.

Environment: Linux(RHEL 4.x,5.x, 6.x), SUSE 11/10, AIX 6.1, Oracle 11/10g, Jboss 5.x/6.x, WebSphere Application Server 5.x/6.0/6.1, WebSphere MQ 5.3, Samba, Autosys, Perl, Shell Scripting, Bash, F5 Load balancers, Site Minder5.5/4.5, LDAP Directory Server6.0,EMC Storage SAN, Veritas Cluster Server (VCS), VMWare servers, and Apache.

Confidential, Reston, VA

Linux/UNIX Administrator

Responsibilities:

• Installing, upgrading and configuringRHEL servers using kickstart.
• Key role in LinuxPatching.
• User administration, creating Users, Groups and giving permissions as requested.
• Providing day-to-day user administration like adding or deleting users, password aging.
• UsingRemedytool for creating Change Requests.
• Worked withNetwork teamunderstanding about theTCP/IP protocols, SMPP, routersand sending requests to open theports.
• Installation, configuration and maintenance ofNFS and NISon Sun Solaris.
• InstalledBIND 8.2.ConfiguredDNS Primary,SecondaryandDNS clients. Generated/etc/named.confand other files for use in the named directory. Usednslookupto query the Local Server.
• Reconfigured theKernelfor various system parameters usingkmtuneandkmadmincommands. Added new device driver,rebuilt kerneland used the new kernel to boot the system.
• Monitoring the Production servers usingNagiosandMonitortools.
• SetupNFS Servers, Diskless clientsandAuto clientsand automountedthe file systems usingdirectandindirect maps. Also setup entries in/etc/exportsandmountedthe disks onto the client systems by adding entries to/etc/fstab.
• Provided 24x7 supports as Web admin and to build and supportApacheandTomcatServers.
• Worked inNOCcenter.
• Watching the alerts coming from the servers usingNMSmonitoring tool.
• Open the Bridge call and bring other teams into the call for resolving the severe issues.
• Deploying theDSMagents into Windows/Solaris and Linux boxes.
• Implementation and maintenance ofVeritas Cluster Server.
• ImplementedDNS, NIS/NIS+ and NFSfor administrative and project requirements.
• Installation, configuration and maintenance ofDNS, NFSon Sun Solaris and IBM AIX environment.
• Installation ofApache, Weblogic and TomcatWeb servers.
• CreatingSSLcertificates for windows servers and Solaris/Linux Servers.
• Developed UNIX shell scripts usingKorn, C Shell, Bash ScriptingandPerl.
• Supporting databases likeOracle, Sybase, DB2andOracle RDBMS.
• Responsible for maintenance of development tools and utilities and to maintainKornshell,Perlautomation scripts.
• Configuring distributed file systems and administeringNFS server and NFSclients and editing auto-mounting mapping as per system / user requirements.
• Installation and monitoring ofVeritas Cluster Server.

Environment: Unix, Linux, E15K, E10K, E6500, SunfireV880, V440,Monitor,IBMNetcool, Sun Storage Array D1000, A5000, T3,Storagetek L700, RS/6000 and P-Series Servers, Web logic, Veritas Volume manager, Veritas netbackup, Veritas cluster server.

Confidential, Irving, TX

UNIX Administrator

Responsibilities:

• Systems monitoring and administration of Servers for day-to-day problems, patches, user administration, hardware failure, monitoring log files, backup, software up gradation, configuration changes and documentation.
• Sitting inNOCroom and watching the alerts and involved in resolving the alerts.
• Open the Bridge and get other teams in a call for resolving the alerts.
• Monitoring and Managing the DNS resolvers using the IBM TIVOLI NETCOOL and Nagios.
• Planning, installing and configuration of operating system onnew Servers.
• Installation, configuration and maintenance ofDNS, LDAPandNIS+on Sun Solaris and IBM AIX environment.
• Providing day-to-day user administration like adding or deleting users, password aging and writing stored procedures and shell script.
• 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.
• CreatingSSLcertificates for windows servers/Linux Servers.
• Providing day-to-day user administration like adding or deleting users, password aging.

Environment: Unix, Linux, E15K, E10K, E6500,Monitor,IBMNetcool, Sun Storage Array D1000, A5000, T3,Storagetek L700, RS/6000 and P-Series Servers, Web logic, Veritas Volume manager, Veritas netbackup, Veritas cluster server.

Confidential, Bentonville, AR

UNIX Systems Administrator

Responsibilities:

• Responsible for installation, configuration, and administration ofLinux/Solaris.
• Installed and configuredTripwire, DNS, Nmap, SSL,sftp, Sshon UNIX & Linux servers.
• Responsible for troubleshooting various problems on different environments such asdevelopment, QA, StagingandProductionby analyzing log files.
• Responsible for implementation,documentation, integration, problem resolution, root cause analysis, quality assurance, disaster recovery,audits,performance tuning,upgrades, OS backups,,developingscripts,executingmigrations, adding/removing users, space management,backups and recoveryand all other daily system administration functions.
• Migration fromWebSphere 5.xtoWebSphere 6.0/6.1at enterprise level.
• Implemented Disk mirroring and RAID implementation usingVeritas Volume Manager.
• Worked onEmulex/Qlogic HBAinstallation onSun Fire v240, v440, v480, v490, v880 and v890.
• Performed deployment activities and environment support including installation, configuration, diagnostics, planning and upgrades forWebsphere Application ServerandJboss Application server.
• Wrote and modifiedshell scripts(Perl, C, ksh) &cronto perform automated administration task.
• Manageddata center migrations, data center backupandrecoveryoperations utilizingStorageTektapelibraries andLegato Networkersoftware.
• Installed and ConfiguredApache HTTP web server, (LDAP), OpenWave, Novell's Identity Manager on AIX.
• Configured Jumpstart, Kickstart, NIM and HP ignite serversandperformed respective installations.
• Involved intest planning,testing methods, including walkthroughs,simulations,joint testing,and surprise testingof real disasters as a part ofDisaster recoverytest drive.
• Liaised with DBA team forOracle databaseinstallation,restoration, performance issues, network related issues on Unix Servers and with vendors for hardware related issues.
• ConfiguredLUNs, created logical volumes, file systems, exported and mountedNetApp filerson host.

Environment: Red Hat/Linux 4, SUSE 9, AIX 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, Shell Scripting, Bash, VERITAS Volume Manager, VERITAS Netbackup 5.0, WAS 5.x/6.0/6.1, JBoss 4.0, Perl Scripting, Veritas Cluster Server, Apache.