SUMMARY:

• A Senior Administrator with 10+ years of extensive experience in UNIX System Administration in Red Hat Linux (RHEL 3/4/5/6), Sun Solaris 8/9/10, IBM AIX (4.x/5.x/6.x/7.x) and Win NT/2000 Servers.
• Extensive System Administration experience in heterogeneous environments comprising Linux, UNIX.
• Excellent in patches and packages installation on Linux/Unix Environment
• Experience in implementing High Availability Clusters using Veritas Clustering, Redhat Cluster Server.
• Configuration of NIS, NFS, SAMBA, SENDMAIL, APACHE SERVICES on Linux & Unix Environment.
• Experience in VERITAS Volume Manager, configuration and maintenance VERITAS File System.
• Experience in Logical Volume Manager for creation of Volume groups / Logical Volumes and File systems in UNIX environment.
• Expert in Upgrades, installs, configuration and administration security and monitoring tools on Linux.
• Experience in LVM and SAN/NAS storage.
• Experience in creating physical volume, logical volume, volume groups using LVM’s in Linux.
• Advanced knowledge and skills in Linux Operating System, High Availability/Clustering, System Backup/Restore, Kickstart and Logical Volume Manager software products.
• Experience in Linux kernel configuration.
• Expert in load balancing techniques and puppet management.
• Excellent in Configuring and Administering NFS, SMTP, DHCP, samba in heterogeneous environment.
• Supporting Level2 and Level 3 for Datacenters contains 3000 + servers.
• Coordinating with Vendor Support engineers to resolve high priority issues.
• Setup, maintain and management of user accounts and groups according to the security needs and adding the packages and patches when needed.
• Initiating Backups on daily basis and monitoring the scheduled backups.
• Expert in Datacenter Operations including hardware, software setup monitoring, troubleshooting on a 24 x 7 basis with Tivoli monitoring tool and Remedy, HP Service manager ticketing Systems.
• Provide support to SQL, MYSQL, Oracle, Data guard and DB2 database while coordinating with database teams.
• Building Customized Scripts / LVM for the SAN (HOST) based migrations.
• Experienced in Writing and Updating Shell Scripts and Perl Scripts.
• Experienced in Installation and Configuration of Web Sphere Application server V3.5/4.0/5.x,6.x, IBM HTTP Server, Sun - one Webserver on AIX, Solaris and Linux platforms.
• VMware Infrastructure 5.x Installation & Configuration.
• Planning and Designing VMware VI3 (ESX3.x/ ESXi/ Thin ESX and VMware Virtual Center).
• Expertise in managing application tools Jump Start, Solstice Disk Suite, and SVM.
• Configuring & Troubleshooting NFS Servers and Clients, in UNIX Environment.
• Implementation of RAID levels like 0, 1, 0+1, 5 using VERITAS Volume Manager.
• Good exposure to Network Storage Solutions like DAS, NAS and SAN.
• Very good exposure of the migration process using SRDF.
• Provide lun mapping to EMC for the storage to replicate to new data center.

TECHNICAL SKILLS:

Operating Systems: Linux (Red hat - RHEL 3/4/5), IBM AIX (4.3, 5.1, 5.2, 5.3), HP-UX, Solaris, Windows 03/00/NT4.0.

Hardware: HP DL380 G5/G6/G7/Gen8, Dell Poweredge 1950, 2300, 2450, R810.IBM RS/6000, IBM Blade center, JS20, JS21, HS20, pSeries 570, 590, 595, 650, 630, 670, 780, 770, 750, 740, 730 SUN Enterprise 450.

Web Servers: Apache (httpd), apache-tomcat, jboss, weblogic. Tomcat, Apache, WebSphere, Apache Http Server, IIS 4.0/5.0, MQ Series.

Languages: C, Clearcase, Shell scripting Ksh & Bourn Shell, JavaScript, HTML, JAVA, C, C++, Korn Shell programming, PL/SQL

Databases: Oracle 8i/9i/10g, DB2, MS SQL SERVER 7.0/2000, SyBase.

Networking: NIS, NFS, AutoFS, DNS. TCP/IP, DNS, DHCP, Cisco Routers/Switches, and LA

Other Skills: VMware, VCenter Server, VMware Server, Xen, Solaris Zones. LPAR, NIM, TSM IBM tape libraries.

PROFESSIONAL EXPERIENCE:

Confidential, Rehoboth Beach, DE

Unix System Administrator

Responsibilities:

• Provided on-call support by rotation to provide 24x7x365 support within a 3000 server environment.
• Comfortable working with Red Hat Linux (RHEL 3/4/5/6) and IBM AIX (4.x/5.x/6.x/7.x).
• Administration of RHEL 5 and 6 which includes installation, configuration, testing on both physical and virtual machines.
• Acquired comprehensive requirements from Project Managers, Team Leads pertaining to the servers to be migrated.
• Expert in Datacenter Operations including hardware, software setup monitoring, troubleshooting on a 24 x 7 basis with Tivoli monitoring tool, Remedy, and HP Service manager ticketing Systems.
• Utilized Remedy for data center service requests (Network requests for IP’s, ILO’s, and DNS changes).
• Performing change management as per company standards in accordance with the hardware provider.
• Attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.
• Monitored trouble ticket queue to attend user and system calls.
• Reporting ticket status and communicating with requestors & box owners over Voice Conference Bridges in case of severities.
• Setting up cron schedules for backups and monitoring processes.
• Experience in building Puppet Master server on RHEL.
• VMware Infrastructure 5.x Installation & Configuration.
• Automated server building using System Imager, PXE, Kickstart and Jumpstart, for Solaris and RHEL Servers.
• Expert in Upgrades, installs, configuration and administration security and monitoring tools on Linux.
• Excellent in patches and packages installation on Linux/Unix Enivronment
• Build, configure and deploy Virtual machines and templates.
• Hands on experience in configuring ESX, ESXi and vSphere4 with virtual center management.
• Took part in VMware ESX (3.5,4.1) installation, updates, patches, and gathered information for capacity and performance analysis to identify potential servers for virtualization.
• Setup and configure failover load balancing using IP bonding for network cards.
• Hands on experience with Jenkins, Ant, GIT, Chef and puppet.
• Working on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager. File system Tuning and growing using VERITAS File System (VxFS), coordinated with SAN Team for storage allocation and Disk Dynamic Multi path.
• Used Iptables to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel.
• Experience in iptables commands including those used to add, append, delete, insert, or replace rules within a particular chain, parameters are required to construct a packet filtering rule.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
• Experience in Linux kernel configuration.
• Updating YUM Repository and Redhat Package Manager (RPM).
• Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.
• Building Customized Scripts for the SAN (HOST) based migrations.
• Expert in load balancing techniques and puppet management.
• Configuring RAID and build the new server using the image on system imager server with PXE boot.
• Installation and configuration of Redhat Device Multipathing.

Unix Administrator

Responsibilities:

• Worked as System Administrator on Linux/AIX - UNIX platforms.
• Configuration of NIS, NFS, SAMBA, SENDMAIL, APACHE SERVICES on Linux & Unix Environment.
• Administered Linux servers Linux (Red hat - RHEL 3/4/5), for several functions including managing Apache/Tomcat server, mail server, MySql database, and firewalls in both development and production.
• Install and configure hardware and Linux software to all servers in the network per specifications of clients.
• Responsible for Patching Linux Servers.
• Monitored the servers and Linux scripts regularly and performed troubleshooting steps - tested and installed the latest software on server for end-users.
• Installed, configured and managed VMware infrastructure (ESXi, Virtual center).
• Perform standard system administration tasks, such as patching, software and hardware upgrades, troubleshooting and problem resolution.
• Install and configure various services like DHCP, NFS, DNS, Apache Web Server, NIS, LDAP, Samba, SSH, FTP/SFTP, Sendmail/SMTP, Telnet, RPM Package Management, File System Management.
• Responsible for resolving network issues using network tools like ping, tcptraceroute, traceroute, tcpdump.
• Develop Linux shell scripts to accomplish redundant tasks to simplify in distributed administration.
• Create users with limited and full root privileges. Create and manage sudoers.
• Perform day to day Linux administration such as user accounts, logon scripts, directory services, file system shares, permissions. Support Oracle database.
• Setup NFS and Samba File sharing on Linux and Windows servers .
• Setup and Manage environment using Puppet Configuration Management tool.
• Working closely with Oracle DBS’s, Networking Team, QA Team and Developers.
• Expertise in the OS Upgrade from 5.3 to 6.1 and 7.1.
• Migrating AIX OS from AIX 5.3 to 6.1 on P570, P590, P595,P750, P770, Servers
• Expertise in Installation, Configuration and Maintenance of VIO Servers versions 1.5, 2.1, 2.2
• Strong understanding of server security practices and tools with an emphasis on SUDO rules configuration.
• Installed and configured Sudo for users to access the root privileges.
• Configuration of SUDO rules for logging and access control
• SOP creation of documentation and training material pertaining to the use and management of newly defined SUDO rules
• Extensive experience in the concept of LVM, User & System Resource Management and Job Scheduling.
• Experience in Hardware and Software refreshes on the server.
• Responsible for installing, configuring and maintaining AIX servers including the logical partitioning on pSeries 550, 570, 595, 710, 720, 740, 750, 770, 790 and 795 servers.
• Performed software and server support for production servers. Assisted with critical system outages, software upgrades, and capacity planning. Coordinated with business executives, software experts, help desks, and data source teams in a 24x6 availability environment. Support tasks involved work with AIX RS/6000 servers, DB2 databases, WebSphere products, and Brio Enterprise reporting tools.
• Performed common system administration task including adding users, creating file systems, configuring volumes weekly mksysb.

Linux Administrator

Responsibilities:

• Providing on line support for around 900 Linux/Unix/Aix servers in a Data Center Production Environment
• Install and administer Veritas volume manager and managing file systems.
• Upgrading Linux servers.
• Installation and Configuration of VCS, Configuring VCS Response to Resource Faults, Cluster Communications, Maintaining VERITAS Cluster Server
• Actively participated and supported in the migration of 460+ production servers from old data center to New Data Center
• Immediate acknowledgement of issues & solving them while constantly updating status for all levels of severities and provide RCA report.
• Coordinating with SAN team to create new disk volumes for ORACLE and Sybase database teams
• Involved in decommissioning servers project as per the company procedures and update the hardware inventory database.
• Creating documentation for datacenter hardware setups, standard operational procedures and security policies
• Switching the service groups from one node to another.
• Installation, configuration and driver upgrades of HBA's on UNIX and LINUX servers.
• Power Path software installation, configuration and administration on UNIX and Linux Servers.
• Encapsulating and mirroring the root disk.
• Logging events and forcing crash dumps, securing servers and troubleshooting issues.
• Co-ordination with Application team for performance/upgrade related issues.
• Co-ordination with backup team for recovery of files/slices.
• Reporting ticket status and communicating with requestors & box owners over Voice Conference Bridges in case of severities.
• Configuration and administration of NIS, NFS & DNS environment
• Create and maintain technical documentation for new installations and systems changes as required.
• Providing solutions to client about Disk mirroring and RAID implementation using Solstice Disk Suite and VERITAS Volume Manager & Cluster
• Maintaining, Upgrading, Troubleshooting Hardware (MBD/CPU/Memory replacement, network problems, console problems, hard disk errors etc.) of sun servers like SF V100/V120/V240/V440/V480 / V490/V1280 /V880, Enterprise 220R/420R/6500.
• Coordinate with vendors SUN, IBM, HP, and VERITAS for RCA’s.

Linux Administrator

Responsibilities:

• Provided on-call support by rotation to provide 24x7x365 support within a 3000 server environment.
• Comfortable working with Red Hat Linux (RHEL 3/4/5/6) and IBM AIX (4.x/5.x/6.x/7.x).
• Administration of RHEL 5 and 6 which includes installation, configuration, testing on both physical and virtual machines.
• Acquired comprehensive requirements from Project Managers, Team Leads pertaining to the servers to be migrated.
• Expert in Datacenter Operations including hardware, software setup monitoring, troubleshooting on a 24 x 7 basis with Tivoli monitoring tool, Remedy, and HP Service manager ticketing Systems.
• Utilized Remedy for data center service requests (Network requests for IP’s, ILO’s, and DNS changes).
• Performing change management as per company standards in accordance with the hardware provider.
• Attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.
• Monitored trouble ticket queue to attend user and system calls.
• Reporting ticket status and communicating with requestors & box owners over Voice Conference Bridges in case of severities.
• Setting up cron schedules for backups and monitoring processes.
• VMware Infrastructure 5.x Installation & Configuration.
• Automated server building using System Imager, PXE, Kickstart and Jumpstart, for Solaris and RHEL Servers.
• Expert in Upgrades, installs, configuration and administration security and monitoring tools on Linux.
• Excellent in patches and packages installation on Linux/Unix Enivronment
• Build, configure and deploy Virtual machines and templates.
• Hands on experience in configuring ESX, ESXi and vSphere4 with virtual center management.
• Took part in VMware ESX (3.5,4.1) installation, updates, patches, and gathered information for capacity and performance analysis to identify potential servers for virtualization.
• Setup and configure failover load balancing using IP bonding for network cards.
• Working on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager. File system Tuning and growing using VERITAS File System (VxFS), coordinated with SAN Team for storage allocation and Disk Dynamic Multi path.
• Used Iptables to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel.
• Experience in iptables commands including those used to add, append, delete, insert, or replace rules within a particular chain, parameters are required to construct a packet filtering rule.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
• Experience in Linux kernel configuration.
• Updating YUM Repository and Redhat Package Manager (RPM).
• Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.
• Building Customized Scripts for the SAN (HOST) based migrations.
• Expert in load balancing techniques and puppet management.
• Installation and configuration of Redhat Device Multipathing.

Linux Administrator

Responsibilities:

• Responsible for the Administration, Planning, Designing, Configuring troubleshooting and performance tuning on the AIX 4.3/5.1/5.2/5.3/6.1 and Linux servers.
• AIX administration supporting RS6000 Servers, installing, configuring and maintaining WebSphere Application Server, Samba Server and IBM HTTP Server.
• Responsible for the operation, maintenance and integrity of a distributed, networked AIX based environm
• Responsible for NIM installation, setting up NIM servers, clients, define the resources, Alternate Disk Migration with NIM
• Involved in the migration of Solaris 8 to Solaris 10
• Created/used LDOM in Solaris 10 and installed multiple OS.
• Solaris Live Update Technology associated with an operating system upgrade or maintenance.
• Experience in migrating UFS root file system to ZFS root file system using Live Upgrade.
• Experienced with the installation, configuration and volume/File system management using Veritas Volume Manager, Logical Volume Manager (LVM) and Solstice Disk Suite (Solaris Volume Manager).
• Experience in creating physical volume, logical volume, volume groups using LVM’s in Linux and HP-UX (ITANIUM and PA-RISC).
• Knowledge of UNIX Clustering in RedHat Linux, virtualization, package creation and LVM maintenance.
• Expertise in Grant users rights to execute commands with elevated privileges, eliminating the need for access to privileged accounts and passwords
• Installing, Configuration and Migration of Solaris 9 and from Solaris 9 to Solaris 10.
• Provided support for ZFS and maintained Pools for storage management.
• Experience knowledge of Solaris 10 with zones/containers, dtrace, zfs, server creation and Kernel and TCP/IP tuning.
• Creating new file systems, mounting file systems and unmounting file systems.
• User and Group administration in Linux and Solaris environment.
• File management, disk space management and security administration of user’s accounts, files, and directories on various servers running under Linux.
• Software installation, updating and trouble shooting on systems using NIM and media.
• Installation and configuration of VIO servers.
• Defined virtual SCSI, virtual Ethernet adapters and created VIO client adapters from HMC and mapped them.
• Extensive Experience in using the latest features of AIX, such as creating LPARs with CPU and sub CPU partitioning, virtual IO server, JFS2 file system and configuring dynamic LPARs
• Played an active role in monitoring the backups that are run on a daily and weekly basis using Veritas Net Backup.
• Applying software maintenance, program fixes and keeping the system software releases current.
• Involved in performance tuning of Java based applications
• Installation/Administration of TCP/IP, NIS/NIS+, NFS, DNS, NTP, Auto mounts, Send mail and Print servers as per the client’s requirement.
• Configured cascading, mutual takeover and rotating modes of operation of the HACMP and HACMP/ES products.
• Administration Tasks included User administration, Performance, weekly mksysb, adhoc mksysb, documentation.
• Expertise in installing, configuring and troubleshooting on JS20 Blades in IBM Blade center.
• Expertise working in a huge environment that consists of almost 700 Servers including RS/6000, p-series and IBM Blade Center.