SUMMARY

• Having 5 Years of Experience in UNIX/LINUX Systems Sun Solaris (8, 9 and 10), RedHat Linux 4.X, 5.X and 6.X, 7X CentOS, SUSE (10 and 11), Debian, OEL &HP - UX 10.x, 11.x and AIX (6.1, 5.x).
• Experience in installation, administration, implementation, testing and maintenance of complex and heterogeneous networks consisting of Linux (Red Hat), Sun Solaris 8/9/10, IBM AIX, SuSE, Windows.
• Experience in installation, configuration and volume/disk management using Veritas Volume Manager (VxVM), Solaris Volume Manager (SVM) and Veritas File System (VxFs) in Solaris and logical volume manager (LVM) in Linux. Installation and administration of zones on Solaris 10.
• Experience in Administering and monitoring tasks related to the support of Weblogic Application Server in Linux and Windows Environment.
• Installation, Configuration & Management of Redhat Cluster Suite in Linux servers.
• Expertise in Installation, Configuration, Integration, Tuning, Backup, Crash recovery, Upgrades, Patching, Monitoring System Performance, System and Network Security and Troubleshooting of Linux/Unix Servers and SELinux concepts
• Deployment and Maintenance of Linux server systems to run AWS Cloud environment.
• Setting up continuous integration and build management environment using Jenkins, GitHub, docker containers, VMWare and VirtualBox.
• Extensive administration experience in Storage Area Network (SAN) and Network Attached Storage (NAS).
• Network configuration for interfaces, switch ports, Ethernet cards, host names, net mask and routes details, DNS, NFS, LDAP, NTP and SNMP etc.
• Responsible for providing service to customers such as OCC, NOC, ISG, ASG & TSG.
• Understanding and troubleshooting skills with networking communications and protocols such as TCP/IP, NFS, DNS, SMTP.
• Strong experience in writing Bash and Perl scripts to automate business process.
• Experience in building servers using Kickstart for Linux and Jumpstart for Solaris.
• Extensive experience in Linux performance monitoring and kernel tuning and Load balancing.
• Installation, configuration of Package and Patch Management.
• Working experience with cloud infrastructure of AWS (Amazon Web Services) and computing AMI virtual machines of Elastic Compute Cloud (EC2).
• Experience with setting up Linux servers for Oracle Real Application clusters and configuring SAN based amount points.
• Setting up HA Cluster using HA Proxy, Pacemaker, Corosync and iSCSI shared storage.
• Extensive experience in Linux performance monitoring by using top and prstat and load balancing, security setup, troubleshooting.
• Experience in Installing, Configuring and Managing the servers (Amazon Web Services, Tomcat, Jenkins, Git, SSH, Sendmail, Sudo, etc).
• Experience in maintaining/tuning/upgrading Web servers/Web application for Java applications.
• Installation and configuration of Oracle RAC clusters on Linux/Solaris environment
• Extensive experience in Multipath and Bonding in Linux.
• Performed planning and implementing migrations on Solaris and Linux servers.
• Experience on VMware Installation, configuration and monitored virtual environments with ESX 4x,5x servers and VirtualCenter4x,5x.
• Experience on backup and recovery software like Veritas Net backup 5.1 and 7.5 on Linux environment.
• Installation and configuration of guest Operating Systems like Windows, Linux and Solaris for different applications on ESXi environment.
• Work support to all Linux system problems 24x7 and resolving them in timely basis and ensuring high availability.

TECHNICAL SKILLS

Operating System: RedHat Linux (AS/ES 5/6/7), CentOS, Solaris 10/9/8, Debian, VMware ESX 2.x,3x ESXI 4.x,5x Windows 2003/2008/2012 etc.

Scripting Tools: C, C++, HTML, BASH, WLS

DevOps Tools: Git,Maven,Jenkins,Chef, AWS

Web Servers: Apache, Tomcat, Jboss& Web logic

Security: SUDO, SSH, SSL

Networking& Protocols: DNS, DHCP, TCP/IP, NFS, NTS, SMTP, LDAP

Email & DNS Servers: Postfix, Sendmail and BIND, Microsoft DNS.

Database: Oracle, MySQL

Monitoring: CA Tools, Nagios, HP Performance Manager, System inbuilt utilities

Cloud Technologies: Amazon's AWS, Openstack, Nova, Keystone

Virtualization tools: VMware ESXi, MS Hyper V, KVM, Docker Containers

PROFESSIONAL EXPERIENCE

Linux Administrator/Infrastructure Specialist

Confidential, Baltimore, MD

Responsibilities:

• Installing, Configuring and OS Upgrades of Server systems such as Red Hat enterprise servers (version 5, 6 & 7), CentOS, Microsoft Server 2012 & 2008 etc.
• Performing standard system administration tasks such as patching, software & hardware upgrades, directory services, troubleshooting and problem resolution.
• Enforcing the Data Center server standards, policies & procedures, setting up and maintain user accounts and managing access control.
• Monitoring all servers associated with Cigna's environment.
• Deployment and Support of OpenStack Cloud based on RHEL/CentOS.
• Experience in using Puppet & Chef for OS configuration & automation.
• Providing and managing network storage LUNs and LVMs using Target CLI and iSCSI
• Configured LDAP clients on server test and troubleshoot for maintaining network & data security.
• Experience in building of RAC clusters & setting up monitoring for any new oracle database.
• Monitoring regular load of application server and doing operational support.
• Managing Linux containers using Docker and docker registry.
• Scheduling Cron jobs for disk utilization, CPU utilization, Backing up/Restoring of file systems, backup schedules, System administration and Maintenance tasks using shell scripts. .
• Working knowledge of Active directory databases like Microsoft Active directory domain services.
• Deploying security update and patches to the Linux platform to run more stable and secure infrastructure.
• Performance monitoring and tuning servers using tools like top, ps, prstat, netstat, lsof, vmstat, sar etc.
• Providing key operational statistics on system usage, disk utilization, downtime & performance.
• Worked with EMC SAN to acquire storage and setting up veritas/LVM file systems.
• Supporting Dev, QA and Production on daily basis and ITIL practices like change management, incident management, problem management & release management.
• Health checks of servers and generates reports for critical servers.
• Installation/Configuration of VMware infrastructure including vCenter, ESXi, etc.
• Provide guidance on best practices for server configuration, patching and system management.
• Experience in new server builds & adding monitoring to them based on customer requirement, server decommissioning.
• Removing the instances which power-off state by taking confirmation from server owner.
• Create and maintain documentation on Linux server builds, policies and procedures, ensuring they are accurate & current.

Environment: Red Hat Linux (RHEL 5/6/7), Red Hat Satellite Server, Oracle RAC, Veritas Cluster Server, NAS, Active Directory, NIS, Apache, RAC, AWS, Infrastructure Management, VMware, RPM, HPSM, LVM, Web sphere.

Sr. Linux Administrator

Confidential

Responsibilities:

• Installation/configuration of Redhat 4/5/6 using kickstart Server and Solaris 9/10 using Jumpstart.
• Performing Post Build activities like Setting up Backup interface/ NIC bonding/ Loading additional Packages/ Joining the server to Active Directory, etc.
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure.
• Worked with EMC SAN to acquire storage and setting up Veritas/LVM file-systems.
• Deployment and management through AWS cloud formation on EC2 instances and also maintaining Amazon S3 storage.
• Installation, configuration and deploment of Vmware products such as VMware workstation, VMware converter, VMware view, VCB and more in virtual environment.
• Responsible for automating build and monitoring tasks across AWS and Rackspace using a variety of tools such as MongoDB, NginX, Jenkins, and JIRA.
• Worked with Oracle DBA's for restore of Oracle Instance and Building Oracle RAC Cluster.
• Worked on creating Virtual machines using VMware.
• Configured, tuned and maintained MySQL Server database servers.
• Analyze and troubleshoot on an advanced level, performance of SAN backed VMware ESX infrastructure to determine proper allocation of resources to a multi department user population with widely varying needs.
• Performed hardware, operating system, security and application updates/patches on these systems as well as operating system hardening based in industry standards.
• Mirrored existing logical volumes & created volume groups, disk groups & set up the RAID (0,1,5) using VERITAS volume manager. Migrated the existing UFS data to VxFS for best possible IO performance.
• Installed/Configured the WebSphere server, JBoss application server, Web logic server; Managed tuning and performance of high profile applications running on them.
• Working Knowledge of Network Protocols such as NTP/ NIS/ TCP/ DNS/ DHCP/ HTTP/ SMTP/ SFTP/ FTP/
• Worked with Enterprise Security Manager to get Security certification for servers before moving them in to production.
• Provided technical support and expertise in the design, development and process of software development tools based on the systems environment.
• Developed Cron jobs and Shell Scripts (Perl, Python) for automating administration tasks like file system management, process management, Server reboots etc.
• Worked on Datacenter Moves where servers were moved from one datacenter to another.
• Working very closely with vendors (IBM/HP/Sun/EMC) in resolving any hardware/ Storage and Network issues.
• Monitoring the system performance and doing the kernel tuning to enhance the system performance.
• Troubleshooting Production Server Problems related to web applications, Sendmail, disk space, file system, DNS and network connectivity.
• Provided 24/7 on-call support on a weekly basis.

Environment: RHEL 4, 5.x, 6, Solaris 9, 10,, RedHat Satellite Server, Veritas Storage Foundation 5, Oracle 10g/11g, Veritas Cluster Server, Zones, RAC, DMZ, Send mail, SAN, NAS, Active Directory, NIS, ITM, Bladelogic, Remedy, VMware, Netbackup 6.5, LVM, VAS, Websphere

Linux System Administrator

Confidential

Responsibilities:

• Installed and configured RedHat Linux (5.x), Solaris8/9/10(SPARC & X86), AIX 4.3/5.1/5.2/5.3/6.1 on AIX RS6k platforms, pSeries and BladeCenter and maintain upgrade packages, monitoring and analyze performance running with Oracle 10/11g database servers.
• Worked on configuration management and automation software such as Puppet and Chef.
• Host Integration of Symmetrix and Clariion with Solaris, Linux, Vmware ESX and Data Migration on Symmetrix DMX/Vmax.
• Configured LDAP clients on server test and troubleshoot for maintaining network and data security.
• Used VMware vCenter, created datacenter environment by creating VMware clusters, adding ESX hosts in the clusters and implemented HA and DRS.
• Configured Jumpstart server for Solaris 10, Kickstart server for red Hat Linux, NIM for AIX and performed image installations through Network.
• Automated provisioning and scaling of Couch base cluster using AWS Ops Works stacks
• Installing, configuring and maintaining AIX/Linux servers including the Logical Partition (Lpars) on pSeries servers as required.
• Extensively used RPM RedHat Linux tools to install packages and patches for RedHat Linux server and Vir-Install, Vir-manager to install and manage the Virtualized OS.
• Used EMC Solutions Enabler APIs for the storage interfaces that provide an access mechanism for managing Symmetrix third-party storage, switches, and host storage resources.
• Administered server consolidation program using VMware ESX server and VMware Virtual Center, using Virtual Center, ESX, creating VM's, using/building VM templates and customization files and scheduling task.
• Managed Storage Connectivity for Solaris systems - Software/Hardware used in connecting to SAN fabric, development of scripts to populate sd.conf and verify DMP connectivity, HBA logging, etc.
• Extensive use of Logical Volume Management (LVM), creating Volume Groups, Logical volumes and disk mirroring for Linux/AIX.
• Troubleshooting the network and Domain Name System (DNS) issues and taking care of VERITAS Netbackup server and client.
• Worked with developers and architects to refine build, test and produce practical approaches across the organizations.
• Installed and configured WPARs Manager and agent to prevent memory and migration Manager Database from Apache to DB2.
• Worked on dealing with Server down and kernel panic issues.
• Developed automated scripts/system monitoring tools/ testing tools using shell and Pyhton Scripting.
• Setup and configured the SAN Storage DS8300, DS4300, DS4800, Sun Storage Tek 6140 Array, provided support for multi-path Fiber Channel storage systems.
• Configured the cluster resources and provisioned Tape backups using VeritasNetbackup that includes Fiber zoning for media servers and Tape drivers, configuration of Storage units.
• Migrating various IBM P & I Series Servers to newer IBM Power6 servers using Virtual I/O (VIO) and SAN Volume Controller (SVC), EMC Power Path for migrating Data and host based encryption including Dynamic Multipath (DMP).

Environment: RHEL 5/6, RedHat Satellite Server, VmwareESXi, HP Proliant DL380/DL580/BL 460c, Oracle RAC, VeritasNetbackup, Apache, LDAP, Solarwinds, VAS/QAS.

Linux Administrator

Confidential

Responsibilities:

• Worked on Server build using Jumpstart, NIM, Ignite and kickstart Process.
• Extensively involved configuring & administering Net Backup clients, AutoSys, SAN Devices & Other Storage solutions like Power Path and VERITAS DMP.
• Performed SAN migration on Solaris servers from IBM Shark to SVC storage.
• Worked on UNIX performance monitoring and kernel tuning and Load balancing (F5 Load Balancer) to ensure stable performance. worked on VMware installation and monitoring Virtual environments with ESX 3.x Servers and Virtual Center 2.x.
• Installing, configuring and monitoring, VERITAS Volume Replication (VV), VERITAS Cluster Server (VCS), Sun Cluster Server, HP Service Guard, Red hat Cluster Server and HACMP cluster in High Availability Environment.
• Worked on configuring Global File System(GFS) and Zeta byte File System(ZFS)
• Automated provisioning of cloud infrastructure with Chef.
• Installed, configured, administered, troubleshoot VMware server on ESX platform and VMware client, workstation.
• Created physical volume, logical volume, volume groups using LVM's in Linux
• Implemented Virtual Machine Cloning, Snapshots, Backup Policy.
• Worked on installing and configuring VMware/Esx Servers for virtualizations.
• Devise strategies for Disaster Recovery Management (DR), including planning and designing servers for back up, recovery and archival of server / database information.
• Widely worked on Disk and File system management through Logical Volume Manager (LVM) on Linux and Solaris Volume Manager (SVM) on Solaris.
• Advance level of experience in researching OS Issues, applying Patches and opening the Vendor Tickets like Remedy, Redbox.
• Worked closely with People soft, Jboss& FIX applications from the UNIX perspective.
• Strong working knowledge of Routers and Switches, Sub netting, VLAN, TCP/IP, VPN, OSI model, Firewall (checkpoint), VOIP and Sarbanes Oxley compliance (SOX).
• Technical professional with management skills, excellent business understanding and strong communication skills.

Environment: Solaris 9/10, AIX 5.3/6.1, Oracle 10/11, Logical Volume Management (LVM), VERITAS Cluster Server (VCS), Web logic 8.1, Oracle e-business suite, VMware, RHS 6, IBM SAN storage, LDAP, VMware ESX-3.5.