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System/linux Administrator Resume

Lawrenceville, NJ

SUMMARY

  • 8+ years of experience as a System Administrator involved in system development, design, configuration, and management in physical and virtual environments.
  • Experience in Windows, Ubuntu, Red Hat Linux, SUSE Linux, Centos and Solaris servers for Administration in Production, Development and Test environments.
  • Experience in System Administration, Installation, Upgrading, Patches, Migration, Configuration, Troubleshooting, Security, Backup, Performance Monitoring in Linux system.
  • Expertise in VMware Virtualization solutions, VM Migration & Cloning in VMware ESXi servers, managing VMs, handling networking issues and troubleshooting.
  • Expert in DNS administration, including daily DNS administration, health check and monitoring, in - depth troubleshooting, installation, and upgrades.
  • Technical expertise in Storage, Disk Management, Logical Volume Management (LVM) and RAID disk partitioning.
  • Experience with Jenkins, Maven, Ant, SVN and GIT.
  • Experience in Deployment and supporting the systems hosted OpenStack and Confidential Helion
  • Experience in TCP/IP network setup and troubleshooting.
  • Experienced in analyzing hardware performance, Linux server performance, Kernel performance, Network performance problems, and implementing maintenance procedures.
  • Experience in a Data Center Environment using ESX server, troubleshooting experience with ESX and ESXi Servers, vSphere and vCenter Server.
  • Experience in configuring Networking Concepts DNS, NIS, NFS and DHCP, troubleshooting network problems like TCP/IP, providing support for users in solving issues.
  • Experience in Cloud computing and creating AWS instances and deployed Linux and Ubuntu on AWS environment.
  • Working on the regional server issues through Incidents Tickets of Remedy tool proficient in setting up LAN and WAN networks.
  • Experience working with AWS Cloud computing and involved in creating AWS instances and deployed Linux and Ubuntu on AWS environment.
  • Experience in Bash, Perl, Python and Ruby Scripting.
  • Proficient in monitoring and reporting issues with Data Center devices like Windows & Linux servers, Storage and Backup network technologies like SAN, NAS, RAID.
  • Experience in Implementing and Supporting High Availability Cluster environments using Veritas Cluster and Linux Cluster services.
  • Experienced configuring Cisco routers and L2/L3 Switches along with IP Sub netting.

TECHNICAL SKILLS

Operating Systems: RHEL, CentOS, Windows Server

Databases: Oracle, PostgreSQL, MySQL, MS Access

DevOps Tools: Puppet, Ansible, JIRA, Confluence, Stash, Jenkins, GitHub, HP-ALM

Networking: TCP/IP, DNS, NFS, SSH, DHCP, Cisco, SMTP, SNMP, ICMP

Virtualization: VMware vSphere ESXi, vCenter, Docker, Kubernetes, OpenShift

PROFESSIONAL EXPERIENCE

Confidential, Lawrenceville, NJ

System/Linux Administrator

Responsibilities:

  • Executed Linux Server Administration tasks including patching and security compliance requirements, as well as troubleshooting customer issues.
  • Responsible for monitoring and completion of all incoming backup and restore incidents and service request workload to meet SLAs.
  • Delivered technical expertise in system upgrades, process improvements, adherence to security requirements, and infrastructure improvements.
  • Delivered System Admin. support for Linux servers that host critical applications & services.
  • Build servers using Kickstart technology as well an interactive method and introduced them to a network with proper hardening techniques.
  • Conduct system capacity and planning, as well as aid users in accessing and using business systems.
  • Incorporated Automated Installation of multiple CentOS servers using PXE server and Kickstart files.
  • Participated in migrating Apache servers into AWS Instances behind Elastic Load Balancer (ELB) with all the website contents in S3 storage.
  • Applied advanced partitioning schemes like Software RAID for redundancy and LVM for file system growth needs, which maintained availability, increased capacity & performance of machines in production.
  • Mange data protection infrastructure involving multi-vendor Tape libraries, disk-based storage, and Veritas Backup Appliance.
  • Worked with Nagios to health check the various deployed resources and services.
  • Monitored backup servers and media server health, in terms on memory and disk usage.
  • Performed day to day Tape media management.
  • Performed NetBackup master media and NetBackup appliance upgrades.
  • Assisted members on connectivity or network issues via SSH or Network adapter conflicts.
  • Provided 24/7 on-call support to maintain production server availability in team environment.
  • Upgraded security configurations to efficiently mitigate security vulnerabilities identified in the security audit and scan vulnerability reports.

Confidential, Columbus, Ohio

Linux Administrator

Responsibilities:

  • Performed system administration in Red Hat Linux environment, installation support, kernel parameter and disk partition file system, volume management and routine backup.
  • Involved in managing 500+ servers both Physical and VMware.
  • Setup, configure and troubleshoot volume using LVM; whereby performing tasks related to managing disk storage and installation OS.
  • Configuring Red Hat High Availability Cluster and Failover Cluster servers at Datacenter.
  • Working on Docker containers to host the application and Microservices.
  • Install and configure Red Hat Linux Kickstart and booting from SAN and managing multipathing at boot level and OS level.
  • Leveraged AWS cloud services such as EC2, Auto-scaling and VPC to build secure, highly scalable and flexible systems that handled expected and unexpected load bursts.
  • Wrote Shell and Python scripting to automate the regular tasks like removing core files, taking backups of important files, file transfers among servers.
  • Configured NFS Servers for both media and data sharing between servers and resolved any shared server issues.
  • Creating, cloning Linux Virtual Machines, templates using VMware Virtual Client and migrating servers across ESX hosts.
  • Monitored System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
  • Jumpstart Solaris servers, custom configure, install packages, patches, harden. Creating LDOMs, installing Solaris, creating volumes & installing packages.
  • Configuring kickstart server on SUSE Linux.
  • Installed packages, ran CRON jobs, & over-all configuration management of Linux servers using Puppet & Chef
  • Worked on implementation and troubleshooting of network services like NFS, FTP, NTP, Telnet, SSH.
  • Provided administrative supports and performed branching & merging operations using GIT.
  • Involved in monitoring, performing file and group security.
  • Enforced ITIL process while pushing builds/deployments to prod & pre-prod environments.
  • Perform Network configuration for both physical and virtual servers.

Confidential, Princeton, NJ

Linux Administrator

Responsibilities:

  • Responsible for installation, testing, tuning, upgrading, and loading patches, troubleshooting physical and virtual server issues of an environment with 500+ servers.
  • Involved in creating and managing users and group accounts, passwords, permissions, disk space allocations and process monitoring in CentOS and Red Hat Linux.
  • Installed RedHat Linux using Kickstart and interactive installation and apply security polices for hardening the server based on company policies and procedures.
  • Management of user accounts and groups according to the security needs.
  • Handling LVM related tasks, Creating, resizing LVM, Veritas Volume manager and managing Cluster environment using Veritas Cluster suite.
  • Configured remote access systems through SSH, managed system security in TCP Wrappers.
  • Managed systems routine backup, scheduling jobs such as disabling and enabling CRON jobs, network logging of servers for maintenance, performance tuning, and testing.
  • Resizing the filesystems based on the requirement increasing/shrinking the size on VM's and physical servers which includes local drives and SAN disks.
  • Responsible for installation and configuration of Chef and creating cookbooks and recipes to create the run list and configure them to nodes.
  • Involved in backend solution, day to day Administration& Monitoring, File System Management and Disk Management.
  • Installed packages, ran CRON jobs, & over-all configuration management of Linux servers using Puppet & Chef
  • Established continuous integration (CI) practices and standards.
  • Implementing and troubleshooting of network services like NFS, FTP, NTP, Telnet, SSH.
  • Provided administrative supports and performed branching & merging operations using GIT.
  • Strictly enforced ITIL process while pushing builds and deployments to prod and pre-prod environments.
  • Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.

Confidential, Chicago, IL

System Administrator

Responsibilities:

  • Provided technical support to Middleware & Database teams, Application testing & production support.
  • Involved in providing everyday support to 2000 RedHat Enterprise Linux servers on virtual, AWS and physical platforms.
  • Involved in Unix system administration includes Installing, configuring, troubleshooting and updating Solaris servers.
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
  • Documented the standard procedure for installation and deployment of VMAX Migration and logical volume manager.
  • Installing RedHat Linux using kickstart and applying security polices for hardening the server based on the company policies.
  • Installation, configuration, support, and security implementation on following services: DHCP, SSH, SCP.
  • Scanned Application and database servers on a regular basis using Symantec ESM tool to check for security holes that need to be fixed or patched.
  • Created and managed Logical Volumes and File Systems using Veritas Volume Manager on Solaris as well as RedHat and LVM on RedHat Linux.
  • Involved in creation and maintenance of raw disks and volumes for databases.
  • Performed Host Based Migration using VERITAS Plex Level Mirroring on Linux.
  • Applying new patches and packages for RedHat Linux.
  • Expanded new storage to existing and new systems using VERITAS Volume.
  • Helped troubleshooting various networking and system related issues with LINUX server’s application and hardware.
  • Worked with LVM to configure various volume groups, logical and physical partitions.
  • Responsible for configuring and monitoring various day to day user management activities.
  • Handled system monitoring activities like CPU loads, RAM loads, Ports monitoring, Disk Space monitoring, File Space monitoring.

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