SUMMARY

• Over 6 years of IT experience specialized in UNIX System Administration working on server - based operating system; kernel configurations on Redhat Linux, CentOS, SUSE, Debian 7, Ubuntu 12.x/13.x and Solaris 8,9 (32 bit & 64bit)Networking, kernel Parameter & Tuning, Trouble Shooting System & Performance Issues, Package Management and Patch Management.
• Extensive experience in installation, configuration and administration of Solaris 7, 8, 9, 10, Redhat 5.x, 6.x IBM AIX 4.3, 5L, 6.x and 7.x Support and maintenance of Sun Ultra Enterprise Servers (E3500, E4500, E450, E420R, E250), Sun Fire (6800, 4800, 3800, V880, V4xx, V2xx,).
• Experience in implementation and maintenance of VMware, DNS, DHCP, NIS, NFS and SMTP.
• Proficient in handling Hardware issues, Migration and Data Center Operations.
• Proficient in Linux Utilities: KICKSTART, SSH, FTP, AUTOFS, Quota Management, wrappers, User Management, Process Management, Memory Management, and Text processing tools, Log Management, Package Management, Disk Management and Swap Partition/Files Management.
• Expertise in writing Shell Scripting using Ksh/Csh/bash and Perl to ease administration tasks
• Experience in Installing, configuring and maintaining apache/tomcat, samba & send mail, and Jboss Application Servers.
• Expertise in VMware Virtualization solutions, VM Migration & Cloning.
• Experience in Installation, Configuration, Implementation, up-gradation, Maintenance and Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• Experience with Linux system administration and virtualization (RedHat, Ubuntu, VMWare)
• Expertise in file system concepts like LVM, SVM, VxVM. Creating new file systems, increasing and decreasing file systems, mounting file systems, un mounting file systems and troubleshooting Disk space issues.
• RPM and YUM package installations and Updating Redhat systems using RPM and yum.
• Efficiency in installing, configuring and implementing teh RAID Technologies using various tools like VxVM, SVM and LVM.
• Troubleshooting network problems such as TCP/IP, providing support for users in solving their problems.
• Familiar in LDAP setup and Administration.
• SupportedSolaris/Linux servers in production / stage / development environment.
• Worked on Setting up and Configuring F5 Load Balancer.
• Good presentation, customer support and trouble shooting skills & experience in providing 24x7 supports.

TECHNICAL SKILLS

Operating Systems: Red Hat Linux ES & Centos OS 4.X, 5.X, 6.X & 7.X, Ubuntu 10.X Solaris 10, Windows 2K, XP, 2003, NT, 2008, 2012, and 6, AIX 7, HP-UX 11.23

OS Administration: RedHat 5.X 6.X,7.X Linux administration, Solaris 10 Administration

Scripting Tools: Shell, Perl, Python, Ruby

Scheduling Tools: Autosys, crontab

Application servers: WAS 7.X, 8.X JBoss AS 5.x, 6.x, 7.x and JBoss EAP 5.x, 6.x

Web Servers: Apache(httpd), apache-tomcat, and Apache http server

E-Mail servers: Sendmail, Postfix, Zimbra

Monitoring: Nagios, ZABBIX

Networking: DNS, DHCP, TCP/IP, SMTP, LDAP

Third Party Tools: Splunk, Puppet, Chef, Jenkins, DevOps

Virtualization tools: VMWare vsphere, ESX 5.X

Others: MS-Office

PROFESSIONAL EXPERIENCE

Confidential, Albany, NY

Linux Administrator

Responsibilities:

• Installed, configured and Administrated of all UNIX/LINUX servers, includes teh design and selection of relevant hardware to Support teh installation/upgrades of Red Hat (5/6), CenOS 5/6, Ubuntu operating systems.
• Creating customized Kickstart profiles for each server and making ISO to build teh server
• Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satellite server, Up2Date, YUM, RPM tools.
• Administration and support of homogeneous production and development server infrastructure of multiple flavors of Linux.
• Performed Building up of servers, deployment activities, and environment support including installation, configuration diagnostics, planning and upgrades.
• Responsible for design and implementation of IT infrastructure such as data center, servers, storage, backup, and virtualization.
• Support for Linux/Unix systems administration, operational support and problem resolution for server systems. Created shared NFS file system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting & Stopping teh NFS services.
• Responsible for Installation, configuration, Maintenance, Deployments, Update, Monitoring, performance tuning on Linux.
• Integration tools configuration(Jenkins)
• Installing junkis on redhat distributions
• Designing System Requirements, Designing Storage requirements, Configuration Management/Change control/Release management.
• Installing Veritas Volume Manager 4.0 and configuring Disk Groups, Volume Groups and Logical volumes to manage teh storage resources.
• Creating, Resizing and managing online JFS Filesystem for users upon user request using Veritas Volume manager and LVM.
• Installation/Configuration of ESXi 3.5, 4.x and 5.1 servers and applying security patches to teh ESXi servers
• Experienced in monitoring and debug performance issues on different OS Linux (RHEL & Centos),
• Systems log management, Data backup and restoration with UNIX native tools (tar/dd).
• Managed DNS server. Updated forward and reverse lookup files for all teh new machines added in teh domain. Created reverse lookup files for teh new subnets added into teh network.
• Installed and maintain puppet-based configuration management system, configure and managing LVM on Linux using tools like lv extend, lv create, resize2fs etc.
• Scanning teh newly assigned LUNs to teh serves and assigning them to volumegroup and increasing teh filesystem using redhat volume manager
• Performed daily housekeeping functions, such as establishing new accounts, creating and resetting passwords, developing, system backups and recovery, and installing software patches and updates.
• Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, FTP, TCP/IP, and print servers to insure optimal networking and printing functionality.
• Worked on FTP servers for sending and receiving files between local and remote servers.
• Worked with MySQL, MS SQL Server, and their feature set and created database in Mysql as per teh requirement
• ITM agent installation, configuration and setup monitoring for application logs
• Monitored system performance using sar, prof, vmstat, iostat, netstat, Nagios.
• Working with teh native multipathing for teh high availability installation / configuration on Red Hat clusters
• Experience in administration & configuration management of Puppet on Linux and puppet enterprise management from teh console
• Modifiying teh manifest as per teh requirement on puppet.

Environment: Red Hat Enterprise Linux 5.x, 6.x, LVM, HITACHI, EMC, VMware VSphere 5.X, DNS, DHCP, DIG, SNMP, SMTP, Ethernet, netstat, NFS, NIS, nslookup, TCP/IP, tcpdump, Korn shell, Cisco switches & routers, chef, VLAN, Fiber Channel, Nagios XI, Perl, Bash, Tomcat and Apache and JBoss Eap 4.x.5.x.

Confidential, Austin, TX

Linux System Administrator

Responsibilities:

• To provide ongoing support in systems management and administration of LINUX/UNIX in global-scale environment.
• Loading teh server with RHEL - 5/6, configuring and supporting them.
• Configuration and administration of logical volume manager.
• Configuring teh FTP, DHCP, DNS and troubleshooting them.
• Deployment of UNIX /Linux, VERITAS and Build of various environments.
• Provide rotational on-call Tier III support responsibilities. Production Support: Provided 24x7 supports for various divisions within teh Company and resolve all production issues in a high pressure and time sensitive environment. Installing jenkins with dock
• Supported Disk Volume Management crating volumes with LVM.
• Used apache proxy to access jenkins
• Issues related to NFS, NIS, LVM, Grub corruption, configuration & maintenance of RAID (level 0,1,5), troubleshooting VERITAS Volume Management and cluster server environment.
• Developing scripts in PERL and SHELL to automate teh process.
• Built more TEMPthan 1000 servers from scratch and applied relevant patches on existing servers.
• Built 25+ Red Hat Linux 8.0 servers from scratch and provide 24*7 production support.
• Performing System Storage management/LVM tasks like creating volume groups, PV’s, LV’s and jfs/jfs2 File systems, mirroring, VG’s, LV’s and mounting File systems.
• Managing teh user environment by adding, modifying and removing user accounts from teh environment and limiting access to appropriate nodes.
• Test and install various patches (Fix Packs) on teh servers to solve teh problems encountered by teh applications running on teh servers.
• Optimized performance by tuning Unix OS, kernel, memory, I/O, Database, Applications and Networks.
• Installed, configured and supported RAID 0, RAID 1, RAID 0+1, and RAID 5 on SANarrays.
• Decommissioned small and obsolete servers and consolidated them into one large server.
• Configuring teh drivers for QLOGIC adapters and bringing teh adapters to online to visible in teh Fabric
• Installed/Configured redhat Linux cluster 5x version & Configuring teh cluster resources
• Adding storage to teh cluster disks and increasing/ decreasing teh filesystem in RHEL.
• Creation of Fence devices in teh cluster, Creation Failover domains for teh cluster and Flip over/ Failover test in between teh nodes in teh cluster
• Planned, Documented and implemented Disaster Recovery policies.
• Creating teh file system’s using Red Hat volume manager and performing teh health check on regular basis for all Linux serves.

Environment: REDHAT LINUX 4.x,5.x,6.x, SUN fire T2000, T4k, M 5000, JBOSS AS 4.x,and Veritas volume manager5.x, Veritas Net backup 6.5, Web logic 10.x.,Oracle 10G/ 11i/RAC, HP 9000 Superdome SX1000, Volume Manager, VMWare ESX SERVER,, Shell scripting, SAN/Mc Data Switches, Brocade Switches, chef, RED hat satellite server

Confidential, Birmingham, AL

Linux Administrator

Responsibilities:

• Deployment, configuration and administration of VMware VSphere 5.1 environments as well as Red Hat (5.x and 6.x) and Oracle Enterprise Linux (OEL) environment and installed required binaries and packages.
• Configured and monitored Disk mirroring, stripping using LVM
• Managed Disk File Systems, server Performance, Users Creation and granted file access Permissions.
• Created groups, added Users ID to a group as a primary or secondary group, removing Users ID from a group as well as adding users in Sudoers file.
• Performed administration tasks related to DNS, BIND, DHCP, NIS, LDAP.
• Setup and configured DHCP, Kickstart, and PXE servers for automated system builds.
• Configured servers, install patches, and support teh virtual infrastructure
• Worked on teh configuration of server monitoring tool like Nagios XI.
• Implemented automation tools such as Splunk, Puppet, Chef and DevOps
• Configured Resource Pool, V Motion, Alerts, Alarms, NTP, HA, DRS and deployed virtual servers using template.
• Upgrading teh Application as per Application team requirements. Scheduling jobs using crontab and at.
• Migrate Physical Servers to Virtual Serves using VMware Converters and migration of Virtual Machines using V-Motion.
• Supported Solaris/Linux servers in production/QA/ Development Environment, includingSolarisZone and RHEL VM's crash recovery and system images for Backups working on monitor data and configuration backups
• Done with LAMP Setup in RHEL, MySQL setup, Performance Tuning, Replication, Commands, Backup and overall Administration
• Configuration and Installation of JBOSS 5.x on Linux servers.
• Installation/Activation of F5 Load balancers, configure routing logic, creation of new service pools, members, virtual servers etc.,
• Teh Chef client is installed on each server.
• Maintaining automated processes for monitoring services
• Installation and configuration of LAMP
• Installed JON Agent and configured dashboards, alerts for JVM monitoring
• Performance tuning included tuning teh existing heap values, DB Connection settings etc.
• Created Templates from VM’s, deploy VM’s from templates and allocate resources
• Setting up Users and Groups for access to teh Virtual Center.
• Migrated VM from one LUN to another LUN using Storage V-Motion.
• Performance tuning of VMware servers, Virtual sessions and management of servers resources between Virtual Machines.
• Worked on cronolog in Linux servers for managing teh logs of teh web servers and performed automation using shell, python and perl scripts
• Managed shared NFS files system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting and stopping teh NFS services.
• Worked on configuration and administration of LVM as extending Logical Volume and Physical Volume Size.
• Worked on iLO and iDRAC setup and configuration.

Environment: Redhat Linux 3,4,5,6 Sun Solaris 8, 9, 10, Sun V440, V 20 T5240 Sparc stations 20, Switches, VMware ESX 5.1, oracle 11,Veritas Cluster Server 5.

Confidential, Englewood Cliff, NJ

Linux Administrator

Responsibilities:

• Installation Red hat Linux Enterprise Server 5/6 on Dell and HP x86 HW.
• Installed and configured Solaris 10/11 on Sun T and M Series servers Mirrored root disks on all teh servers by using ZFS & VxVm.
• Installation of Web logic, upgraded to service pack updates, installed BEA patches, configuring and creation new domain & services starting & stopping.
• Planning and implementing Backup and Restore procedures using Ufsdump, Ufsrestore, Tar” and “Cpio”.
• Installed and configured teh Red Hat Linux 5.1 on HP-Dl585 servers using Kick Start.
• Monitoring day-to-day administration and maintenance operations of teh company network and systems working on Linux and Solaris Systems.
• Configured teh NIS, NIS+ and DNS on Red Hat Linux 5.1 and update NIS mapsand Organize teh RHN Satellite Servers in combination with RHN Proxy Server
• Working with Chef - over a SSH connection.
• Installed and configured teh RPM packages using teh YUM Software manager.
• Configured logical volumes using logical volume manager (LVM) and also configured mirroring.
• Production support of Apache, PHP, My SQL, Tomcat including installation, configuration, management and troubleshooting.
• Implemented Puppet, DevOps
• WordPress hosting set up to teh enterprise level by using Chef to configure multiple nodes.
• LAMP installation on RHEL
• Ability to write Shell & Perl scripting.
• Involved in developing custom scripts using Shell (bash, ksh) to automate jobs.
• Defining and Develop plan for Change, Problem & Incident management Process based on ITIL.
• Merged teh generated reports as per request. Formatted data into required format using UNIX Shell Scripts, SED and Awk.
• Networking communication skills and protocols such as TCP/IP, Telnet, FTP, NDM, SSH, rlogin.
• Security auditing using Korn programming. Shell Programming for day to day system administration
• Kick start teh Red Hat Linux RHEL 6 on HP Power edge servers and Cisco UCS servers.
• Deploying Veritas Clusters and Oracle test databases to implement disaster recovery strategies, ensuring uninterrupted availability of teh global systems.
• Configured Logical storage Manager (LSM) for root disk encapsulation and implemented root disk mirroring for fault tolerance.
• NIS, NFS, AUTOFS, NTP Configuration and Administration.
• Define Mapping Servlets, Filters, and Session Configuration on JBOSS.
• Production support of Apache and JBoss including installation, configuration, management and troubleshooting. Installation and monitoring of Veritas Volume Manager, Veritas NetBackup and Veritas Cluster Server on SAN Environment.
• Worked on teh administration of teh JBoss 4.2.2servers including installation and deployments.
• Extensive experience in Security Patching.
• Also coordinating with storage team and networking teams

Environment: Red-Hat Linux Enterprise servers (HP Proliant DL 585, BL 465/485, ML Series, SAN(Netapp), BladeLogic, Splunk, Solaris 8,9,10, Veritas Cluster Server 5.0, Windows 2003 server, Shell programming, JDK 1.5,1.6, HP SIM, Nimsoft, VMware Virtual Client 3.5, AIX 5.2, 5.3, VMware Insfrastructure 3.5.

Confidential 

System Administrator

Responsibilities:

• Performed system administration of UNIX servers by using Operating Systems of Solaris 2.7/8 Managing SUN Solaris, Compaq and Linux workstations and servers.
• Installation of patches and other software packages Disk and File system management through Solstice Disk Suite on Solaris and other logical volume manager for other flavor of UNIX.
• Configuration of Hardware and Software RAID on Digital & Sun Servers.
• Installation of Oracle Patches and Troubleshooting, Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.
• Configuration and maintenance of NIS, NFS, DHCP and DNS Servers on Solaris.
• Disk Management Utility. Used daily for file system creation and file system management.
• Worked in Qmail MTA Installation and Configuration.
• Patch and package administration for installation of patches as per teh company policy and installation of packaged application
• Experience in BIOS UPGRADE and OS installations and configurations and maintenance
• Worked on JBoss clustering, set up new configurations for JDBC providers, Data Sources, connection pools, Connection factory settings, Virtual hosts etc.
• Installed and configured JMX-based services on JBOSS.
• Configured JNDI and JMS on JBOSS.
• Performed tasks on F5 load balancer like installing and renewing SSL certificates and bouncing servers with performance issues after taking them out of teh server pools.
• User, Group management for all teh UNIX servers
• Modifying/ Writing scripts in Bash and Korn shell for optimizing day to day administration
• Editing crontab in post - installation of Unix servers

Environment: Redhat Linux 4,5, Sun Solaris 8,9,10 Sun V440, V 20 T5240 Sparc stations 20, Switches, VMware ESX, Oracle, Apache Web Server 1.3.x, 2.2.x, Sun Java System Web server 6.0, Veritas Volume Manager 4.1, 5, BigIP F5, Oracle 9i, DNS, NFS, Sun T2000, M5000, v480, v8