PROFESSIONAL SUMMARY:

• Over 7 Years. Working on Red Hat Enterprise Linux/Unix System administration under the environment of RHEL 4/5/6, Centos 4/5, Fedora 11/12, Solaris 8/9/10.
• Strong experience working with various Development & Test teams in an Enterprise level environment.
• Responsible for OS installation and configuration through network and standalone installation techniques and also installing third party software’s and services.
• Experience managing various file systems using VxVM, LVM and SVM and also configured filesystems through network using NFS, NAS, SAN methodologies and installed RAID devices.
• Worked along with Monitoring teams to identify and troubleshoot issues on servers using tools like Nagios, Munin and Cacti.
• Handling day - to-day User Administration tasks like adding, deleting and modifying user data and documenting all user data in a centralized location.
• Performance tuning of Linux machines in the environment by kernel parameter tuning, identifying process that hog the system resources and containing them.
• Experience working in customizing the Kickstart and Jumpstart scripts to automate the installation of various servers used for various internal projects.
• Responsible for Backup and Recovery operations of various servers using VERITAS Net Backup.
• Working Knowledge on using and developing basic shell and python scripts used to automate day to day administrative tasks.
• Responsible for OS maintenance activities like upgrading the OS, updating the services and third party software’s.
• Extensively worked on administrating NIS, NIS+, NFS, DNS, DHCP, Mail servers.
• Worked in maintaining integrity of Linux, Solaris servers by performing patching operations on a regular and planned way.
• Experience in working on NetApp V6080 and FAS3000 Series systems.
• Involved in installation, migration and implementation on NetApp systems.
• Created Aggregates, Volumes, Qtrees and setup quotas on NetApp filers.
• Highly experienced with Storage Administration like EMC SAN Administration, NetApp NAS Administration, Veritas Net Backup and Legato.
• SAN responsibilities included configuring multi-pathing or dual paths on RedHat Servers to the SAN unit for the purpose of redundancy, SAN design, and administration.
• Experience in implementing highly scalable, redundant and secure systems architecture including Cisco PIX Firewall, F5 Big / IP HA+ load balancer, Network Appliance storage system and Sybase back end.
• Experience in Migrations using different software’s like EMC open migratory, LVM, rsync etc.
• Good experience and understanding of SAN (SAN arrays; HITACHI, EMC) technology including zoning, disk creation on various systems, maintaining and configuring various fiber switches and storages.
• Working knowledge on TCP/IP, UDP protocols in solving network related issues on the servers.
• Strong working knowledge of Switch and Router configuration and customization with VLAN and Inter-switch communication.
• Working knowledge on Firewall scripts and securing Linux productions systems.
• Installation and configuration of Web Application servers like Apache Tomcat, Web logic, Web Sphere, JBOSS.
• Installation and configuration of web hosting administration such as FTP, SSH, RSH, Telnet, and HTTP.
• Have tested various Linux Environments in the Development/Test Stages to help create a better standardized environment and resolutions of any problems if any occurred.
• Experienced in documenting various maintenance activities and upgrades and changes in the network architecture.
• Worked with a bug/problem tracking system in responding to DNS requests, updates and tasks.
• Experience in working with Virtualization Technologies like VMware in building and configuring Linux, Solaris servers as a part of cost effective solutions.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6, Centos 4/5, Fedora 11/12, Solaris 8/9/10, Windows 98/XP/VISTA, 7 Windows Servers 2000/2003/2008

Services: NFS, SSH, SFTP, FTP, rlogin, RPM, YUM, Samba, Auto FS.

Monitoring Tools: Nagios, Munin, Cacti

Languages: HTML, C/C++, Java Script, SQL, XML, Bash, Python &Shell

Virtualization: VMware ESX 5.0 and Vsphere

Networking: TCP/IP, UDP, LAN, WAN, NIS, LDAP NIS+, DNS, DHCP

File systems: LVM, VxVM, and SVM

Hardware: HP, Dell, IBM

Web services: Apache, Tomcat, JBOSS, Web logic, Websphere

Storage: SAN, NAS

PROFESSIONAL EXPERIENCE:

Confidential, FARMINGHAM, MA

LINUX ADMINISTRATOR

Environment: Red Hat Linux 3,4.x,5,6 VMware ESX 5.0, Veritas Volume Manager, Sun Solaris 8,9,10, Solaris Volume Manager, Veritas Cluster Server, Debian, Web logic 8.1, Samba, SQL, Oracle 9i/10g, JBOSS, Windows servers 2000, 2003, 2008, XP, 7.

Responsibilities:

• Manage ISP and Webhosting Systems on required hardware platforms in a production environment with minimum downtime.
• Manage all internet applications inclusive to, but not limited to DNS, RADIUS, LDAP, Apache, Sendmail, Cyrus, Postfix, MySQL, PHP. In addition, be proficient in writing scripts, and maintaining backups.
• Design, configure, install and maintain all hardware including, but not limited to clustered, stand alone servers, blade servers, running VMware, and storage solutions including, RAID and SAN technology.
• Provide technical support, training and technical documentation to the Information Technology team, auxiliary departments and contractors.
• Installed and configured SAMBA server for windows and Linux connectivity.
• Working with LDAP and active directory in order to resolve user management issues.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Clustering, Load balancing and migration of MySQL.
• Implemented NIS and NFS for administrative and project requirements.
• Installed Web Logic 8.1 with SP5 Server and configured Domains, Admin and managed servers for Applications to be deployed.
• Work with the Data Network Engineer to monitor the integrity and system reliability and traffic patterns of the ISP, Webhosting and Campus networks.
• Work with the Data Network Engineer and other personnel/departments to analyze hardware requirements and alternatives and make acquisition recommendations.
• Provide superior customer support for Webhosting, ISP and LAN Customers on troubleshooting escalated support troubles. Communicate with staff, vendors and customers in a courteous, professional manner at all times.
• Installation and configuration of RedHat Linux 5.3 on Vsphere and VMware ESX.
• Document server configurations, and scripts, and all other relevant information in a repository to share information.

Confidential, NJ

LINUX ADMINISTRATOR

Environment: RHEL, 4.5, 5.0, Solaris 8 and 9, Veritas Foundation Suite, Veritas Volume Manager, Tivoli Storage Manager 5.x, Veritas Cluster Servers, Veritas Net backup.

Responsibilities:

• Linux administrators, responsible for providing for 24x7 support for production and responding to users’ tickets from remedy.
• Worked in solving tickets issued on day to day activities and problems related to development and test servers.
• Regular backing up of critical data and restoring backed up data.
• Administered Network File Systems using Automounter and administering user and OS data files in NIS and NFS environment on both Redhat Linux and Solaris environments.
• Experienced with migration of data of Sun One Directory Server 6.1 from Sun Solaris to Redhat Linux, which included migration of user data, indexes and server certificates.
• Implemented the Jumpstart servers and Kickstart Servers to automate the server builds for multiple profiles.
• Installation and configuration of database systems e.g. MySQL, Oracle10g in RHES, Centos environment.
• Installed and configured F5 Load Balancer, creating and configuring clusters and managed servers. Performed system administration using Veritas Volume Manager.
• Oracle Real Application Clusters 10g (Installation and Configuration of Linux Clusters Using RDS over InfiniBand Interconnect.)
• Installed and configured F5 Load Balancer, creating and configuring clusters and managed servers. Performed system administration using Veritas Volume Manager.
• Created Volumes and File Systems using Veritas Volume Manager 4.0 and Veritas File System 4.0 (Foundation Suite) and LVM on Linux. Created disk groups, volumes, file systems, resizing the volumes and file systems.
• Supported VCS 4.0 environment for NFS and Sendmail agents.
• Administered the File Systems and troubleshooting NFS issues.
• Modifying user’s password policies, group policy, UID and GID assignment policies.
• Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat, and cpuinfo to check the CPU utilization, bottlenecks of I/O devices,, memory usage and network traffic.
• Created User Accounts in NIS environment.
• Supported proactive maintenance on systems by timely upgrading Patches to the systems and applications, Scheduling batch jobs and cron jobs.
• Installed and Configured Tomcat and Jboss for Web Application deployment.
• Scanned Web and Application servers on a regular basis to check for security holes that need to be patched.
• Log management like monitoring and cleaning the old log files.
• Securing Apache, Tomcat as per PCI scope.
• Writing Bash and Perl scripts for backup and automation.

Confidential, VA

LINUX ADMINISTRATOR

Environment: Solaris 8/9/10, RHEL-5.4, ONTAP 7.3.1/7.3.2, V240, V440, V480, V490, F3800, X4200, X4600, T2000, HP-DL380/580(G5, G6), NetApp FAS3140, FAS 3020, FAS 3070, FAS 6040, V6080.

Responsibilities:

• Worked with other team members for the installed and configured database and FTP segments for the transfer of data between two segments.
• Installed Linux on VMware virtual servers using Virtual Client Infrastructure Console.
• Installed Linux on HP Proliant DL Series servers using integrated lights-Out (ILO) and Virtual Media.
• Patched different software using RedHat Package Manager and YUM.
• Installed certain RPM packages, which were not installed default for Oracle.
• Installed and configured Apache ANT for automated build processing using RPM.
• Downloaded latest kernel from YUM server, created repo to make it available for the installation of target servers.
• Created Shell scripts and Perl scripts also worked on existing scripts.
• Automating the installs using Jumpstart and Kickstart and building post install scripts using Shell scripting in SUN Solaris and RHEL Servers.
• Upgraded Linux Kernel using YUM.
• Upgraded current Linux version to RHEL version 5.6.
• Install/configure/maintain the Solaris / Linux servers, NIS, DNS, NFS, Mailing List, Sendmail, apache, ftp, sshd.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems on UNIX environments using shell scripting and CRON.
• Upgraded Solaris 9 to Solaris 10 using Live Upgrade.
• Performed Solaris 9 patching using Live Upgrade.
• Ran Retrust after upgrading the Solaris operating system.
• Deployed File System in Veritas.
• Disk and file system management using Solaris and VERITAS Volume Manager and Logical Volume Manager for Linux.
• Configured NAS Aggregates (RAID4, RAID-DP), Volumes and file systems.
• Configured Auto Support, SNMP based monitoring, Syslog routing for NAS management.
• Worked on NFS Exporting and mounting of NAS file systems to Linux based servers using NFS/NFSv4
• Assisted the Backup Team in configuring NDMP based backup for NAS volumes
• Used Performance Scripts on ONTAP 7.3.1 to troubleshoot the issues that arose during the backend disk failures.
• Worked extensively with Vendors Sun, NetApp, and HP for troubleshooting the issues and in replacing the failed Hardware.
• Performed different configuration under Veritas for Oracle agents.
• Performed all LVM and file system tasks like creation of Logical volume and file system, Mount a file system, Modifying size of a Logical Volume and file system, Removing a file system.
• Performed troubleshooting to make VMware tools run on Linux Guest OS.
• Monitored systems using HP-SIM and Nagios.
• Provided 24x7 on-call / Remote Support for Technical Problems on weekly rotation basis.

Confidential, PA

UNIX /LINUX ADMINISTRATOR

Environment: Solaris 7/8, AIX 4.3.2, Red Hat Linux 3.x/4.x, SUN Enterprise Servers, VERITAS Volume Manager 4.X, Shell scripting, SENDMAIL Protocol, Tape drive, Unix/Windows Workstations, VMWare, IIS, Apache.

Responsibilities:

• Responsible for building and supporting Solaris/Linux/AIX/HP-UX/WindowsServers.
• Administration and auditing the SUN servers and installation of the patches on production and development systems.
• Configuring NFS, NIS, DNS, Auto-mounter and disk Space management on SUN servers.
• SENDMAIL configuration and administration, testing the mail server.
• User administration, management, File permissions & archiving.
• Configuration of Veritas Volume Manager s/w. Solstice DiskSuite 4.2.1, Shell scripting, Printer installation, and problems escalation.
• Administration, fail over/testing of clustered nodes.
• Patch administration & Oracle startup/shutdown. Backup and restoration using Solaris in-built commands. Managing the project of customer, interacting with management, suggesting technical solutions.
• Troubleshooting the network issues and response problems.
• Configured LDAP clients and active directory on server, test and troubleshoot for the same.
• Creating new file systems, managing and checking data Consistency of file systems.
• Maintaining the CPU & Memory utilization of SUN Servers reports on the WEB.
• Writing Scripts for automating and testing the code.
• Experience with OS upgrades and installation of third party software, packages and patches.
• Scheduling full and incremental backups using NetBackup on daily, weekly and monthly basis.
• Involved in planning, design and migration of data centers between buildings after accessing all requirements and using current hardware and new hardware.
• Enhanced Shell scripts and Perl scripts from scratch for patch automation.
• Experience with adding and configuring devices like Hard disks and Backup devices etc.
• Used VMWARE in dis project as a virtualization tool.
• Implementing RAID technologies and SAN solutions. Was involved in the configuration of a SAN with McData Switches and Hitachi Data Systems (HDS).
• Configured RAID 0, 1 and 5 levels.
• Experience with configuring and managing Virtual disks, Disk.

Confidential

UNIX ADMINISTRATOR

Environment: Red Hat Linux 3/4, Solaris 9, Veritas volume manager, SSH, LVM, SVM

Responsibilities:

• Establishes system by planning and executing the selection, installation, configuration, and testing of web application server hardware, software, LANs and WANs.
• Defines system and operational policies and procedures.
• Maintains optimal system performance with system monitoring, analysis, and performance tuning.
• Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software in the Active Directory environment and NIS domains.
• Troubleshoots system hardware, software, networks and operating system.
• Designs and runs system load/stress testing.
• Escalates and works with vendors to resolve application issues.
• Secures system by developing system access, monitoring, and controls.
• Establishes, tests and documents disaster recovery policies and procedures.
• Prepares users by designing and conducting training programs.
• Updates job knowledge by participating in educational opportunities; reading professional publications; maintaining personal networks; participating in professional organizations

Confidential

SYSTEM ADMINISTRATOR

Environment: Red Hat Linux 3/4,, Veritas volume manager, SSH, LVM,SVM, Windows Server 2000/2003

Responsibilities:

• Performed installation, configuration and maintenance of Red Hat Linux 3.x, 4.x.
• Linux kernel, memory upgrades and swaps area. Red Hat Linux Kickstart Installation. Configuring DNS, DHCP, NIS, NFS in RedHat Linux other Network Services.
• Worked on EMC disk storage to allocate disk space.
• Setup various user profiles, environment variables/security to ensure smooth operation.
• Monitored overall system performance, performed user management, system updates and disk & storage management.
• Created users, manage user permissions, maintain User & File System quota on RedHat Linux.
• Implementing RAID 1 and RAID 5 on mission critical servers such as domain controllers and file servers.
• Installed and configured Sudo for users to access the root privileges.
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers.
• Performed volume management using LVM on Linux.
• Installed, configured and supported Windows 2000/2003 servers utilizing HP and IBM hardware.
• Created and managed Group Policies within the 2003 Server environment.