SUMMARY:

• Having 10 years of experience on various flavors like Solaris, Red Hat Linux, SUSE, HP - UX and AIX.
• Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Trouble shooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on SUN Solaris, Red Hat Linux Systems.
• Experience in Security Hardening in Unix, Linux and Windows servers.
• Experience in using various network protocols like HTTP, UDP, POP, FTP, TCP/IP, and SMTP.
• Sound knowledge on VERITAS Cluster Server, VERITAS File System and VERITAS Volume manager.
• Helped to establish standards, policies and procedures for all aspects of UNIX server environment (e.g., configuration, administration, documentation, etc.)
• Experience in Server build using Jumpstart, flash archive, NIM, Ignite and Kickstart, Strong working knowledge of scripting and programming PERL and SHELL.
• Experienced in working with Storage Area Network (SAN), TSM, EMC CLARiiON, Celerra, EMC Symmetrix DMX, Control Centre and VMware.
• Experience in designing and configuring open source management tools Puppet, Chef and CFEngine.
• Experience in installation and configuration of Web Sphere, Apache, JBoss, and IPlanet, BEA WebLogic, LDAP, and mail servers.
• Installed, configured and implemented the RAID 0/1/5 volume management using VERITAS Volume manager (3.5/4.x/5.0) and Solstice Disk Suite (SVM) on Solaris. Also Experienced in VERITAS file system (3.x, 4.x, 5.0), VERITAS Net Backup (4.x, 5.x, 6.x) for disk management and mirroring tasks.
• Experience in installing, configuring, supporting and troubleshooting Unix/Linux Networking services and protocols like NIS, NIS+, LDAP, DNS, NFS, DHCP, NAS, FTP, SSH and SAMBA.
• Experience in updating O/S maintenance and modification levels by applying software patches and fixes (APAR’s and PTF’s) that are downloaded from IBM.
• Proficient in System Backup and Recovery from tapes using ufsdump, ufsrestore, tar and cpio.
• Well versed in configuring Volume Groups and Logical Volumes, extended logical volumes for the system growth needs using Logical Volume Manager (LVM).
• Installed and configured Solaris 10/9 with SunOS version 5.9/5.8 with iPlanet Directory server, Resource manager, Solaris volume manager, Multipath I/O, IPMP and extended file attributes features.
• Installation, Configuration and troubleshooting of system security applications like SUDO, SSH, Power Broker and eTrust.

TECHNICAL SKILLS:

Operating Systems: Linux (Red Hat 4.x, 5.x, 6.x), CentOS 5/6, Fedora, Ubuntu, Sun Solaris 10/9/8/7/2.x, IBM AIX 5.x, 6.1, HP-UX 11.xx, 11iv3, Windows NT4.0, Windows 98/2000/2003/ XP/VISTA, Open VMS

Hardware: HP DL360,DL385 G8/G7/G6/G5, Sun Fire Servers - E25k,E15k,12k, E280R, E480R, V240, 420R, V440, V480, V490, V880,V890 4800, E6900 and E2900. IBM - F-SERIES AND P-SERIES, IBM RS6000. Data Centre Servers - E250, E450, E3000 and E3500, M4000,T2000, T5120.

Tools: Nagios, Zabbix, Vagrant, Chef, Cacti, F5, HP SIM, Puppet, IpTables.

Languages: Shell scripting, Perl, Python

Databases: Oracle 11g/10g/9/8, MYSQL, DB2

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

Web/Applications Technologies/Tools: Apache, Tomcat, JBoss, Web sphere, Weblogic

PROFESSIONAL EXPERIENCE:

Confidential, Dallas, TX

Linux/Unix Administrator

Responsibilities:

• Linux Support - RHEL Satellite 6.1.8 setup, Red hat Subscription Management (RHSM), Review existing content Host Registrations, Register New Content hosts, selecting Repositories, setting Sync time, Freezing & Publishing New Versions of REPO Data, Refreshing Subscription Manager on Hosts, Security Errata and patch Maintenance of new and existing Servers, Resolving any dependencies, Troubleshooting any errors during Patching, Logical Volume Management (LVM), Common Unix Print Server (CUPS), OpenSSH Secure Shell (SSH), Name Service Switch (nsswitch), Samba file server (CIFS) & Setting up Monitoring using Nagios xi.
• Linux Red Hat Subscription Manager maintenance and local repo setup
• Register RHEL 5 & 6 hosts to Red Hat network using subscription manager
• Performed Patching and upgrades (release), on stand-alone servers (using single user mode), and live upgrade of servers in production and Linux using YUM update / RPM manager from repository or Redhat subscription management service(RHSM)
• Managed/Configured Redhat Satellite server patch management system
• Configured kickstart server and updating/applying patches to the servers using Redhat Satellite server.
• Creating new groups in RedHat Satellite server and adding servers to configured groups
• Managing and fixing Inactive, Out of date, Ungrouped and Duplicate systems in RedHat Satellite
• Using Satellite to update root password for critical server that could not be placed in single user mode
• Red Hat Satellite for patching, scheduling jobs and other tasks
• Updating patches to keep servers updated against bugs present in the operating system using Red Hat Satellite Server, yum, etc.
• Deploying packages and security configuration files using Chef.
• Manage Oracle VM Manager virtual environment
• Build servers using Kick Start, Red Hat Satellite Server, and VSphere Client.
• Installed, configured and Managed several Oracle VM Servers on x86 and SPARC (LDoms) and Managed under Oracle VM Manager (Appliance).
• Worked with Red Hat Satellite Server which is used to push changes across various servers simultaneously.
• Patching close to 150+ RHEL Servers from 6.5/7 to 6.8 across Sandbox, Dev, Base, QA, Pre-Prod & Production environments.
• Work with VCOPS, vSphere and VMWare ESX taking care of the virtual machines that run Linux.
• Work on Tickets - Extending Disk space & filesystems, set up mount points for sharing files through Samba share & NFS, Set-up & remove printers from CUPS, set-up & remove Users, SUDO access, change permissions, Investigate and provide root cause for errors, Setting up of monitoring of various services, Data Bases & Hosts.
• Worked on variety of Linux platforms Red Hat Linux 5/6 & Solaris which includes installation, configuring and maintenance of applications on this environment.
• Used Logical Volume Manager for the management of Volumes including creation of physical and logical volumes on Linux
• Worked on User administration setup, maintaining account, Monitor system performance.
• Activities includes user administration; startup and shutdown scripts; crontabs, file system maintenance, backup scripting and automation using Perl, shell scripting (bash, ksh) for Red Hat Linux systems.

Environment: Redhat Enterprise Linux 4.x/5.x/6.1, Solaris 8/ 9/10, Tivoli Storage Manager, VMware ESX5, Tivoli Net backup, and Websphere, windows 2008 R2 & 2008 servers, Windows 2003, IIS 7.0 & 7.5, HPC7000 & C6000.

Confidential, Columbus, OH

Linux/Unix Administrator

Responsibilities:

• Support the Business Data analysis team in analyzing user credentials data, subsequently creating Roles, Identity and Resources Groups.
• Perform Validations on the Role/Resource spreadsheet Vs Naming conventions and Access Control Matrix before submitting to subsequent team owners for approvals.
• Implementation of approved entitlements on each resource using OS (Operating System) specific steps for required configuration changes.
• Ensuring Failback procedures is in place, before proceeding with any implementation.
• Implementation steps include but not limited to Backup copy of files, add, remove, update, install, run various scripts and reboot server.
• Involve in Runbook updates, Post-Rollout cleanup and Troubleshooting.
• Install, configure and manage LAMP (Linux/Apache/MySql/PHP ) stacks.
• Maintain a secure hosting environment with latest certified Prism-CMS software, security patches, and software updates and upgrades to database, and application tiers.
• Create templates, cloning Linux Virtual Machines and migrating servers between ESXi hosts.
• Provide support for JBoss 5.x and apache 2.0 application for an operation related to installation and configuration.
• Draftshell scripts for automated installations and to extract logs.
• Work with storage team and application team to ensure the storage allocation and design is done at initial construction time.
• Work with Database administrators to tune kernel for Oracle installations on Linux.
• Perform Veritas Net backup troubleshooting using remote tools and commands.
• Monitor the systems CPU, memory, IDE/SCSI disks, disk controllers, RAID, RAID controllers, file systems, and network parameters using NAGIOS system monitoring tools and BMC performance management tools.
• Integrate more than 500 Linux servers to authenticate using Windows Active Directory using Winbind and Samba.
• Manage DNS for external and internal domain & Sendmail Relay Server for outgoing mails.
• Prepare servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage on 2, 3, 4 node clusters.
• Creating and maintenance of Virtual machines in VMware ESX.
• Design Firewall rules for new servers to establish communication with application, Oracle 10g servers.
• Responsible for managing the Puppet Automation tool including installation, deployment, trouble shooting and updating.
• Set up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Work with engineering team to resolve tickets related to engineering issues like firewall change requests.
• Install/troubleshoot AUTOSYS to schedule application jobs.
• Generate detailed documents and reports on issues and solutions for future reference.

Environment: RHEL 4.x/5.x/6.x, Windows 2007/2008/2010, Veritas Volume Manager (VxVM), Veritas Cluster Servers, Veritas Net backup, IBM X Servers X3400, X3550, X3650, X3650M2, TCP/IP, NIS, NFS, DNS, SNMP, DHCP, Apache 2.0, NAS, Oracle 10g, Oracle RAC, Samba, Winbind, JBoss 5.x.

Confidential, Radnor, PA

Linux/Unix Administrator

Responsibilities:

• Installed, configured, maintained and enhanced operating system and system support software/hardware Enterprise Linux 6.x, 5.x, 4.x, Ubuntu troubleshooting hardware, operating system, applications & network problems and performance issues.
• Installed and configured various flavors of Linux like Red hat, SuSE and Ubuntu.
• Monitored trouble ticket queue to attend user and system calls, participated in team meetings, change control meetings to update installation progress, and for upcoming changes.
• Diagnosing and resolving systems related tasks in accordance with priorities setup in dealing with trouble tickets.
• Network printer’s setup and installation of client/server applications. Defined and setup network protocols, Network File Services (NFS), and Network Information Services (NIS) in Red Hat Linux and AIX systems
• Network trouble shooting using 'netstat', 'ifconfig', 'tcpdump', ‘vmstat’, ‘iostat’ and others.
• Built vservers using the templates as per the application's requirement
• Responsible for adding new DNS and mail entries in their respective servers.
• Day to day production support including checking daily logs, backup/recovery procedures, disaster recovery periodic maintenance and off-hours problem support.
• Monitored the whole Exalogic infrastructure.
• Created clones and Templates of Virtual Machines and Deploying Oracle VM’s through Templates.
• Implemented and administered VMware ESX 3.5, 4.x for running the Windows 2003/2008 Servers on development and test servers.
• Installed and administered Redhat using KVM, Xen based hypervisor.
• Experienced in installing and managing NFS, FTP and Samba for file sharing.
• Installed and managed Tomcat and Apache Web based Server for Red Hat Production servers.
• Identifying, evaluating and recommending the purchase of software, hardware or services that can be used to improve the performance of this group.
• Supervised hardware installations and performed O/S upgrades.
• Experience in working in a huge environment with almost 700 servers including RS/6000.
• Day to day tasks in Red Hat Linux including upgrading rpms, kernel, HBA driver, configuring SAN Disks, multipathing and LVM file system.
• Installation and administration of VERITAS Cluster Manager (VCM), VERITAS Volume Manager (VVM).
• Supporting and troubleshooting of Red hat systems 24/7.
• Performed system administration tasks like system monitoring, performance usage, network support, and user support.
• Created and scheduled cron tasks for file update, system back up or removal of unnecessary files.

Environment: REDHAT 6.x,5.x, Ubuntu, CentOS AIX 4.3/.5.2/5.3/6.1/7.1, SMSAP, TSM, Nortel Switches, windows2000, HACMP Clusters, PowerHA, SAN, NIM, IBM HTTP server, WAS 4.0/5.0, VERITAS, DB2,.

Confidential, Chicago, IL

Linux/Unix Administrator

Responsibilities:

• Installation/Maintenance of Hardware/Software in Production, Development & Test Environment as an integral part of the Unix/Linux (RHEL 5.x / 6.2, SuSE/AIX) Support team.
• Worked on installation, configuration and maintenance of Red Hat, Cent OS, Ubuntu, SUSE, AIX and Windows servers.
• Installed and configured RedHat Satellite server for package transfer across servers, to store client’s system profile and to control other servers in the network.
• Configured LVM and managed it.
• Experience with kick start installation on multiple servers.
• Worked with KVM Hypervisor to install, configure and maintain Red Hat Linux.
• Capacity Planning, Infrastructure design and ordering systems.
• Using VMware vCenter, created DataCenter Environment by creating VMware Clusters, adding ESX hosts in the clusters, and implemented HA and DRS.
• Created and scheduled Cron Jobs such as for Backup, System Monitoring and removed unnecessary files.
• Implemented day-to-day tasks in RedHat Linux that include upgrading rpms, kernel, HBA driver, configuring SAN Disks, multipathing and LVM file system
• Installed, configured, maintained and administered the network servers DNS, DHCP, NIS, NFS, SENDMAIL.
• Worked with DBA’s to install RDBMS database, restore and generate logs.
• Supported physical servers and virtualized servers. Worked with other engineers to support SANs and Oracle VMWare hosts.
• Involved in adding new disks, formatting, partitioning, disk space allocation, monitoring system performance, system tuning, and crash recovery issues.
• Experience with installation and maintenance of NFS, FTP and Samba for file sharing.
• Built Linux servers using VMWare ESX and VMWare ESXi.
• Created Virtual disks/Virtual Target devices to allocate SAN Luns virtually to the VIO clients.
• Set up repositories for Redhat, implemented YUM, SSH and other security tools.
• Implemented RAID techniques and created disk groups and volumes using VERITAS Volume manager.
• Maintained Load balancing, High availability, Failover functionality and Disaster recovery included
• Provided 24/7 on call supports in debugging and fixing issues related to Redhat and SuSE Linux.

Environment: Linux (RHEL 4.x &5.x), AIX 6.1, Oracle 11/10g, SUN Servers, SUN Fires, Samba, Perl, Shell Scripting, Bash, SUSE 11/10, VERITAS Volume Manager (VVM), F5 Load balancers, SiteMinder5.5/4.5, EMC Storage SAN, VERITAS Cluster Server (VCS).

Confidential, Cary, NC

Linux/Unix Administrator

Responsibilities:

• Installation, Configuration and upgrade of RedHat Linux 4/5/6.2, Suse Linux, Ubuntu.
• Performed setup and configuration of Install Server, Configuration Server and Boot Server for Kickstart process.
• Good experience in installation, configuration and maintenance of Linux.
• Experience in configuring and trouble shooting of Kickstart services on multiple servers.
• Experience in System monitoring, Performance tuning and OS hardening to secure the Solaris environment.
• Administered tasks like user and password management, allocating quotas to users as well as system startup and shutdown, monitoring and partitioning.
• Creation of Backup accounts for new users and Deletion of accounts for retired or unavailable users.
• Experience in configuration of NFS and Naming services like NIS and DNS.
• Implemented file sharing on the network by configuring NFS on the system to share essential resources.
• Implementation of RAID techniques and creation of Disk groups and volumes using VERITAS Volume Manager.
• Installation, Configuration and Administration of Weblogic, Websphere and Apache Servers in Linux.
• Worked on VMWare for testing various applications on different operating system.
• Experience of Storage Area Network/SAN.
• Implemented configuration management with Puppet.
• Involved in creating Resource Pools and Port groups on VMWare ESX environments.
• Implementation of RAID techniques and creation of Disk groups and volumes using VERITAS Volume Manager.
• Created System Disk Partition, Mirroring root disk drive using VERITAS Volume Manager.
• Maintained and recycled backup Tapes upon request from company.
• Configured VERITAS Cluster Server (VCS), fail over test of VCS groups, added /Modified VCS resources such as File Systems.

Environment: Red Hat Linux 4.0,5.0, AS ES, AIX 6.1,4.3,5.1,5.2,5.3, HP-DL585, HACMP 5.5,4.2.x,4.3,4.3.1,4.4, VERITAS Netbackup, SAN Storage, 4.5.5, IBM-z/VM, Oracle 9i/10g, Samba, NT/2000 Server, Websphere, Web Logic 8.1, VMware ESX 2.x, LPAR, DLPAR, Tomcat 3.x,4.x,5.x,6.x Apache Server 1.x,2.x, Korn, Bash.

Confidential, Pittsburgh, PA

Linux/Unix Administrator

Responsibilities:

• Installation, Configuration & Upgrade of Redhat Linux
• Used Kickstart for Red Hat for automated installations and VMWARE.
• Installed, Upgrade and Manage packages through RPM and also take care of dependencies.
• Installed and maintain puppet-based configuration management system
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure.
• Implemented configuration management with Puppet.
• Replicated several Unix/Linux servers depending upon the requirement and availability
• Configured Kickstart server and updating/applying patches to the servers using Redhat Satellite server.
• Installing, administering Redhat using Xen, KVM based hypervisors.
• Installed, configured and maintained Redhat Satellite Servers for different applications.
• Performed Linux kernel, memory upgrades and undertook Red hat Linux Kickstart installations.
• Monitored system activities and fine-tuned system parameters and configurations to optimize performance and ensure security of systems.
• Backup management and recovery policies using VERITAS Net-Backup.
• Daily task include growing, creating of VERITAS volumes and file system on San storages.
• Implemented SUDO, SSH and other security tools and implemented security compliance.
• Installed VMware ESX server and configured Solaris 9/10/ Red Hat Linux 5.x / Windows 2003 virtual machines for various applications.
• Supported 24/7 highly available critical system and involved in on-call pager rotation for production support.

Environment: Red Hat Linux (RHEL 5/6), Logical Volume Manager, VERITAS Cluster Server, Global File System, Red Hat Cluster Servers, Oracle, AIX 5.3L, Windows, VERITAS Volume Manager, VERITAS Net backup, Ksh/Perl programming,,CA Service Desk Manager, Varnish servers, windows server 2000,2003, 2008, VMware ESX 2.x, HP-UX.

Confidential

Linux Administrator

Responsibilities:

• Installing, configuring and upgrading Linux (Primarily REDHAT and UBUNTU) and Windows Servers.
• Installing and partitioning disk drives. Creating, mounting and maintaining file systems to ensure access to system, application and user data.
• Data consistency of file system using fsck and other utility.
• Co-coordinating with the customers vendors for any system up gradation and giving the exact procedure to follow up.
• Scheduling the daily/weekly/monthly backups.
• Amended existing scripts as well as wrote new Bourne and Korn scripts related to recurring administration jobs.
• Patching up the system to the latest version as per the recommendations.
• Monitor the health of the servers, Operating system, database and the network.
• Maintenance of Hard disks (Formatting and Setup, Repair from crashes).
• Installing & administering NFS services using auto mounted.
• 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.
• Setup LANs and WLANs; Troubleshoot network problems. Configure routers and access points.
• Installed NIM, set up NIM servers, clients, defined the resources, alternate disk migration with NIM.
• Worked on migrating from Windows 2000 to 2005.
• Allocated disk space using EMC disk storage.

Environment: RedHat Linux 3.9/4.5-4.7, Windows 2000/NT 4.0, Apache 1.3.36, 1.2, 2.0, IIS 4.0 and Oracle 8i, bash/ksh shell, Samba, DNS, APACHE, MAIL, DHCP & FT

Confidential

Linux Administrator

Responsibilities:

• Installed, administered and maintained RHEL, CentOS servers.
• Responsible for Installation, Configuration Management, Maintenance and Systems Development of AIX Systems.
• Responsible for NIM installation, setting up NIM servers, clients, define the resources, Alternate Disk Migration with NIM.
• Maintain User profile, group creation and X-term settings.
• Enabled security using the LDAP registry by assigning different roles to different users and groups.
• Performed User Account management, data backups, and users’ logon support.
• Provided 24x7 support on shift rotation basis.
• Supported Workload management (WLM), Micro-Partitioning, clustering and load balancing.
• Experienced shell scripting to automate administration jobs including backups for Websphere administration repository.
• Performed routine LVM tasks like replacing failed drives, adding new volume groups, extending volume groups/ LVM /file system, exporting and importing volume group for hardware migration.
• Managed cron jobs, batch processing and job scheduling.

Environment: Linux (RHEL), CentOS, Ubuntu, Oracle, HP Servers, HP SIM, Cacti, Zabbix, Centreon/Nagios Monitoring, Apache, Tomcat, Shell Scripting, Bash, RedHat Cluster, F5 Load balancers, Net Apps, LDAP, EMC Storage SAN.