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Senior Unix Operations Engineer Resume

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OBJECTIVE:

  • An industrious and responsible individual with Plus nine years of experience in LINUX system administration .

SUMMARY

  • RHCE (Red Hat Certified Engineer) with over 9.0 years of professional IT experience in System Administration, involved in Remote support, Network setup and maintenance and migration activities .
  • Experience in multiple unix flavours Redhat, Centos,Suse .
  • Experience in multiple virtualization technologies Xen, Citrix xenserver, xencenter, VM migration.
  • Experience in designing, implementing and provisioning whole rack xen pools over Dell hardware.
  • Experience in Unix Shell scripting and Perl scripting for task automation and day to day requirements .
  • Experience in administering Linux. Installation, Kickstart, Configuration and Support of Linux Systems.
  • Experience in setting up hypervisor DOM0, DOMU’s and automatic server building PXE, kickstart, tftp boot
  • Experience on DNS, VSFTPD, NFS, NIS, DHCP, Apache, Sendmail Configuration and Management.
  • Hands on Experience on RAID/LVM/Quota’s Configuration & Management
  • Experience in managing Users and groups and their ageing policies on UNIX base systems.
  • Extensive knowledge in Linux based server environment administration including setting up server and server software, kernel tuning as per the requirement and general troubleshooting of the environment.
  • Hands on experience in real time troubleshooting of live server environments
  • In - depth experience in developing and supporting both production and development environments.
  • Responsible for administration of various servers in production environment which includes production web servers, application servers, database servers, mail servers etc.
  • Responsible for creating and maintaining firewall rules for the production environment. Setting up and maintaining web server/app server in a virtual hosting environment for optimum performance.
  • Restoring the live servers from backup in case of server failure like hard drive failure
  • Responsible for all access control and security measures in the onsite/offshore model development environment.
  • Deploying the products/patches into production environment. Involved in database patching for the live apps.
  • Upgrading/compiling kernel
  • Apache tomcat configurations and virtual host configurations.
  • Good understanding of networking and networking concepts like subnetting, VLSM and acls .
  • Experience in building and scheduling complex Unix application flows through Control M server .

TECHNICAL SKILLS

Operating System: Redhat, Centos, Suse, Solaris 10

Hardware: Dell 420 xd

Virtualization: Xen, Citrix Xenserver

Scripting: Shell Scripting, Awk, Sed, Perl

Service: DNS, NFS, AutoFS, Samba, Ssh, Sftp, Ftp, Dhcp

Authentication Servers: NIS

Middleware: Apache, Tomcat

Proxy Servers/Firewalls: Squid / Iptables

Databases: Mysql

Schedulers: Cron, at and BMC Control M,Xencenter

Mail Servers: Sendmail, Postfix

Others: Kernel Up Gradation, Tuning

Ticketing Tools: HP Service Desk, Remedy, CA Service Desk, Service Now

PROFESSIONAL EXPERIENCE

Senior Unix Operations Engineer

Confidential

Responsibilities:

  • Design and implement scripts for cloning vms through lvm snapshots to reduce downtime in migration .
  • Design, plan and implement private cloud setup of whole rack xen pools .
  • Plan and provision of vms in xenpools for various requirements .
  • Maintain cobbler profiles and distros for physical server build out and vm provisioning .
  • Create and maintain ftp servers for customer file uploads .
  • Experience in migrating physical to virtual servers to reduce rack space, memory footprint etc .
  • Create and maintain zypper and yum repositories for suse and redhat enterprise servers .
  • Create and maintain NFS filers through Dell arrays, plan storage expansion .
  • Implement system log rotation and central syslog servers .
  • System troubleshooting, kernel optimisation for various applications, databases .
  • Compile kernel modules for devices .
  • Install and maintain perl and python modules as per user requirements .
  • Maintain inventory of all vms, servers and xenpools .
  • Capacity planning for storage and server infrastructure for growth .
  • Building, Imaging and maintaining System image for Redhat Enterprise and Suse servers .
  • Maintain documentation for contribution to the production wiki database for sharing among the team.

Systems Engineer

Confidential

Responsibilities:

  • Advanced scripting skills in shell and perl and reduced manual work and hours through automation.
  • Created and deployed complex production shell scripts for application server startup and shutdown and for checking error logs during bounce .
  • Created monitoring script for various parameters with graphic web interface using perl CGI over Sun apache platforms with mysql backend DataBase.
  • Excel reports generation using perl scripts .
  • Created lots of XML file sorter perl scripts for corrections in large no. of XML files as per the requirement .
  • Created perl scripts for automating daily reports into excel files reducing manual efforts .
  • Other utilities like modifying bdf and grep output to user friendly output for HP-UX.
  • Shell scripts for interfacing the DB environments .
  • Scripts for monitoring logs, checking disk utilisation, performance monitoring in boxes, package installation and upgrade over the network etc .
  • Server build network installation, kickstart, pxe boot server and configuration.
  • Building, Imaging and maintaining System image for Redhat Enterprise Linux 5 servers.
  • Puppet deployment and server configuration management with puppet .
  • Install configure and maintain Xen Virtual Linux servers .
  • Troubleshooting various problems related to VM’s and Hypervisors.
  • Building new hosts for DBA’s and various application team.
  • Configuring and maintaining disk related activities like VGs and LVMs as required by DBAs.
  • Discuss requirements with DBAs and create and deploy scripts from scratch .
  • Install and configuring apache - virtual hosting and ftp servers, NFS servers as per user requirements .
  • Configured/Tweak kernel parameters for better performance.
  • Install/test new kernels for various performance tests.
  • Adding functionality of converting sd/hd disks to xvd and also to attach them on fly.
  • Configuring and maintaining YUM Repository.
  • Cloning and migrating virtual machines in Xen domain.
  • Maintain documentation for contribution to the production wiki database for sharing among the team.

Systems Engineer

Confidential

Responsibilities:

  • Script for extracting user data from raw data generated from SQL queries saving time about 4 hours a day .
  • Script for user deletion and addition by reading data from raw files .
  • Script for reporting the replication status of reporting servers .
  • Scripts for transferring patches and updating softwares across the servers in the network .
  • Scripts for updating configuration files in servers in the network
  • Scripts for zipping logs by checking disk utilisation in boxes.
  • Maintaining and managing EA Sports Systems infrastructure and providing 24*7, L2 level remote support to Linux/Unix Servers across the globe.
  • Responsible for maintaining Online and Corporate environments of EA. Resolve bugs reported by quality control team.
  • Tracking all the Incidents and Tasks through CA Ticketing Tool and convert recurring incidents into problems.
  • Deploy packages through IDJIT Web console and apply OS patches .
  • Troubleshooting performance issues like CPU load, memory, disk errors and other OS related errors. Identify and rebuild disk in failed RAID arrays.
  • Look after Xen server issues, general issues in domU .
  • Co-ordinating with DELL support for server hardware related issues.
  • New server buildup, rejumping servers.
  • Scheduling and Troubleshooting batch jobs.
  • Generated documentation about applications, processes, procedures and Relationship with vendors and customer’s documentation aimed at all levels: admin, NOC, personnel and non-technical staff.
  • Create shell scripts to automate system activities like reporting, installation of packages in a no. of systems, and to automate notification to admin.
  • Configure and run shell scripts as per the requirements in day to day task to save time and task automation .
  • Configured shell scripts for monitoring a group of systems and for log rotation.
  • Maintain and administer Apache web server, configure virtual hosting, tomcat integration.
  • Look after daily issues faced by user.
  • Configured monitoring system for notification of system failures.
  • Setting up user and groups’ management.
  • Daily Backups of Databases and File Systems - Monitoring, Scheduling and troubleshooting.
  • Install and remove packages using RPM, YUM utilities.
  • Protecting user data using Sticky Bit.
  • Implemented syslog for Log monitoring of Different critical servers of organization.
  • SSH password less pass-through between two servers, implemented with shell scripts to all the servers in the network.
  • Troubleshooting system routing and Network card issues.
  • Troubleshooting Linux servers booting or any other issues through DRAC / Consoles.

Technical Head

Confidential

Responsibilities:

  • Managing administration of information system, configuration & maintenance of servers.
  • Designing, implementing & supporting networks which include Windows & Linux systems.
  • Configured SAMBA PDC for the entire host in the network.
  • Using SAMBA for sharing & mapping Linux file systems in to Windows machines.
  • Configuring Firewall as per the requirement .
  • Maintaining the network infrastructure, installing & configuring network client workstations.
  • Responsible for user/group/domain management for network resources.
  • Configuring & maintaining Linux & Windows, administer & support Linux system running, Support Tomcat & HTTP server (Apache), NFS, Mail Server (Mail enable) & DNS.
  • Troubleshooting operating system, software, hardware & other problems.
  • Manage and troubleshoot network infrastructure, implement ACLs, configure subnets etc.
  • User and Group administration: Implementing Aging Policies, Sudo Access, SSH restrictions
  • Managing Quota (disk space limitation) for users and groups.

Confidential

Systems Engineer

Responsibilities:

  • Setting up Remote installation server for the network .
  • Administration of network .
  • Maintain dhcp, ftp, nfs, web and samba server for the network .
  • Installation/troubleshooting of servers in the network.
  • Maintenance and configuration of sendmail mail server.
  • Kernel and other server software updates.
  • Looking after overall system and network hardware

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