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Sr. Linux/system Administrator Resume

Hartford, CT

SUMMARY

  • Over 8+ years of IT industry experience as a System Administrator managing RedHatLinux(RHEL) 4/5/6/7, VMware 4/5/6 environment.
  • Regular work involving building new Linux Physical and Virtual servers using kickstart and PXE.
  • Strong noledge of large - scale Linux deployment methodologies, kernel configuration, performance monitoring, and tuning.
  • Resolving system Hardware and software errors and crashes, huge file sizes, file system full errors.
  • Managed packages using RPM/YUM on Red hatLinuxand maintaining patching on Solaris servers.
  • Experience in installing, configuring, supporting and troubleshooting Unix/Linux Networking services and protocols like NIS, LDAP, DNS, NFS, DHCP, FTP, SSH and SAMBA.
  • Expertise in Installation, Configuration and file system management through VERITAS Volume Manager, VERITAS File System, Solstice Disk Suite and Logical Volume Manager (LVM) wif multiple RAID Levels.
  • Problem determination and troubleshooting, Security using SSH.
  • Configure and manage Middleware and web tools such as Apache, Tomcat, WebSphere, JBoss.
  • Installed and configured teh Samba Server and Apache Web Server.
  • Networking communication skills and protocols such as TCP/IP, Telnet, ftp, SSH, rlogin
  • Experience in Implementing and Supporting High Availability Cluster environments using Veritas Cluster andLinuxCluster services.
  • Experiences in Server build using Kickstart, Jumpstart, NIM and Ignite Process.
  • Proficiency inVMWare. Installation and monitoring Virtual environments wif ESX 4.x/5.x Servers and Virtual Center.
  • Creating and Managing user accounts, system security, performance tuning, change management, Documents and procedures.
  • Experience in compiling and tuning theLinuxKernel on database servers.
  • Worked on Solaris to RedhatLinuxserver’s migration for various web, application, dns, mail and database servers.
  • Developed scripts on Korn, C Shell Scripting, SED, and AWK for managing basic administration tasks.
  • Experience in configuration management tool Puppet and Chef.
  • Installation and configuration of Oracle server/client wif backup and exp/imp dumps.
  • Excellent skills in analyzing, designing, implementing and system integration, Knowledge on Switches, Routers, Firewalls, Intranet.
  • Resolving system errors and crashes, huge file sizes, file system full errors.
  • Worked wif Ansibleplaybooks forvirtual and physical instanceprovisioning, configuration management, patchingand software deployment.
  • Deployed Docker Engines in Virtualized Platforms for containerization of multiple apps.
  • Worked in infrastructure team on installation, configuration and administration of CentOS 5.x/6.x/7, Red Hat Linux 8/9, RHEL 5.x/6.x/7, Red Hat Satellite 6 and SUSE Linux 10.x/11.
  • Experience in Package Management using Red Hat RPM/YUM and Red Hat Satellite server.
  • Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoringand Fine-tuning on UNIX Red Hat Linux Systems.
  • Experienced in using software containerization platform, precisely Docker and container orchestration tool like Kubernetes and deployed Kubernetes Cluster on Azure cloud wif master/minion architecture.
  • Extensively worked Wif VMware ESXi 5.1/5.5/6.0, vCenter Server, Host Clustering wif HA, DRS, Replication Manager 5.x/6.0, Site Recovery Manager, vMotion, Physical to Virtual Migration and Managing SAN Datastores wif, iSCSI, NFS & FC.
  • Experience working wif Puppet Enterprise and Puppet Open Source. Installed, configured, upgraded and managed Puppet Master, Agents & Databases. Integration of Puppet wif Apache.
  • Developed shell scripts (Korn, C Shell), Oracle, SQL Server, PL/SQL, PERL and Java Script.
  • Experience in installing, maintaining and managing various rack mounted and Blade servers from Dell, HP, and IBM.
  • Worked on VMFS Data store, Host profiles, Storage profiles, Resource Management and Performance Monitoring.
  • Configured scheduled tasks, alarms and alerts, CPU, Memory and Network Disk monitoring in VCenter.
  • Done Patch Management of hosts and VM’s usingVMwareVCenter Update Manager.
  • Extensively worked on Chef Roles, Cookbooks, Recipes, Templates, Resources, Attributes & Data bags. Proficient in teh setup of Chef servers, workstations & bootstrapping infrastructure Chef nodes for configuration management.
  • Extensively worked on Ansible Playbooks, Inventory files, Vault feature to configure teh servers, deploy software, encryption of data file & orchestrate continuous deployments or zero downtime rolling updates. Worked on Ansible Tower which provides an easy-to-use dashboard, & role-based access control.
  • Experience in Backup Tools like NetBackup, Veeam Backup and Replication Suite.
  • Expertise in writing Bash Scripts, Pearl Scripts (hash and arrays), Python programing for deployment of Java applications on bare servers or Middleware tools.
  • Good Understanding and implementation experience of CI/CD pipelines using Jenkins, automation programmatically by creating Jenkins jobs and pipelines and solving various problems wif ANT, Maven, and Gradle as plugins.
  • Extensively Used Jenkins as Continuous Integration tools to deploy teh Spring Boot Microservices to Pivotal Cloud Foundry (PCF) using build pack.
  • Experience wif Version Control Systems like GIT, CVS, SVN (Subversion), and good understanding of other tools like Bitbucket, Perforce, TFS and IBM Bluemix.
  • Worked wif Application Performance Monitoring (APM) tools like AppDynamics for monitoring JAVA, .NET, and PHP applications along wif New Relic for monitoring performance like browser and for tracking issues in SQL statements.

TECHNICAL SKILLS

Cloud Services: Amazon Web Services (AWS), Azure, OpenStack

Virtualization: VMware ESX/ESXI, Datacenter Virtualization, Power VM, Virtual Box, Citrix Xen, KVM.

Operating Systems: Red Hat Linux 4/5/6/7, CentOS, Fedora, SUSE LINUX, UNIX, Ubuntu 12/13/14, Sun Solaris 8/9/10/11, HPUX 10.x/11.x

Automation/configuration Tools: Chef, Puppet, Docker, Vagrant, Ansible, Jenkins, Hudson, Bamboo, Kickstart, Jumpstart, Terraform, Kubernetes, ANT, Maven.

Web Servers: Apache Tomcat, JBOSS 4.x/5.x, Web Logic (8/9/10), WebSphere Apache 1.3.x, Apache 2.0.x, and ngnix, IIS

Database Technologies: DB2, SQL Server, MySQL, RDS, NoSQL- MongoDB, Cassandra DB, DynamoDB

Scripting languages: Ruby, Python, Perl, HTML5, PHP, Bash/shell Scripting, PowerShell Scripting YAML, JSON.

Networking/Protocol: FTP/SFTP, SMTP, TCP/IP, HTTP/HTTPS, NDS, DHCP, NFS, Cisco Routers, Juniper Routers

Version Control ToTools: GIT, Bitbucket, SVN (Subversion), CVS

PROFESSIONAL EXPERIENCE

Confidential, Hartford, CT

Sr. Linux/System Administrator

Responsibilities:

  • Installation, configuration, and upgrade of RHEL 6.x, 7.x, VMware 4.x, 5.0, 5.1, 5.5 operating systems.
  • Built, configured, and administered Jenkins Continuous Integration tool on Linux machines along wif adding/updating plugins such as SVN, GIT, Maven, ANT, and Puppet. Installed, configured, and supported Puppet to create and enforce standardization across environments.
  • Utilized C++ and Oracle. git was used as teh Source Control tool.
  • Worked on Management of Puppet automation tool including installation of Puppet agent on client.
  • Worked on Puppet extensively for deployment for servers, creating on custom scripts and managing changes through Puppet master server on its clients.
  • Configured Puppet Server for monitoring and installing Puppet Agents in multiple Perform automated user management, installation and configuration of numerous services and backup-using Puppet.
  • Installed, Configured Red Hat 5.X, 6.X Server on HP and Dell Hardware wif halp of Ops ware.
  • Management of Red Hat Linux user accounts, groups, directories, and file permissions.
  • Configured Power Path for SAN devices and Performed Disk management wif teh halp of LVM (Logical Volume Manager).
  • Involved in performing code reviews in C++, Python and Shell scripting languages for moving into development on various UNIX, LINUX operating systems.
  • Automation of Azure cloud infrastructure using ARM templates and Implement migration of On-premises application cloud.
  • Designed Puppet Modules to manage configurations and automate installation process.
  • Developed automation scripting in Python using Puppet to deploy and manage Java applications across Linux servers.
  • Managed user and database on teh MySQL database granting distinct levels of permissions.
  • Install/configure/maintain teh Linux servers, NIS, DNS, NFS, Mailing List, Send mail, Apache, ftp, sshd.
  • Extensively involved in writing scripts on Bash, Shell and Ruby and Installing and configurating of Web Apache Server.
  • Technologies used include: C++, QT, QML, JavaScript and JSON
  • Monitoring of teh system using Nagios and worked on installation or update of patch software’s, firmware, and security patches for all applications in installed infrastructure via RedHat network.
  • Expertise in Global File System (GFS), Creating, configuring and managing clusters in red hatLinuxServers using GFS.
  • Worked on Azure Express Route to set up a private connection to cloud services Microsoft Azure, Dynamic 365 and Office 365
  • RPM package administration using RPM Build.
  • Worked wif automation using ansible on production servers.
  • Configured and managed red hat satellite Network server, performing package management tasks and errata updates.
  • Supported C++ testing framework to improve automated testing.
  • Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center, using Virtual Center, ESX, creating VMs, using/building VM templates and customization files, and scheduling tasks.
  • Installed VMware ESX server 5.0/5.1 and created virtual machines on ESX Servers.
  • Configuring HA/DRS related advanced configuration settings per VMware Best practices
  • Configuring VMFS based storage in virtual center.
  • Installation and Configuration vCenter Heartbeat for vCenter failover and Failback Purpose.
  • Huge P2V Experience usingVMwareconverter running different applications wif Different Hardware.
  • Experience on Host Profiles, Distributed Switch, DRS, VMotion, SV-Motion, Resource pools, permissions, Patches, Snapshots, Tools Upgrade, disk expansions, Templates, and many more.
  • Performance monitoring using Sar, Io stat, VM stat and Mpstat on servers and logged to cacti monitoring tool for graphical view.
  • Deployed Kubernetes Cluster on Azure cloud wif master/minion architecture and wrote YAML files to create many services pods, deployments, auto scaling, load balancers, labels, health checks, Namespaces and Config Map.
  • Pushed RPM’s across teh Linux farm wif teh halp of BigFix and Rebuild corrupted RPM and LDAP database.
  • Configuration and administration of DNS, LDAP, NFS, NIS, NIS+ and Send mail on Red Hat Linux servers.
  • Limited user access and limits wif specified sudo rules and limits for generic application accounts.
  • Installed, Configured, and managed ESX VM’s guests wif virtual center and VI client.
  • Intensely worked wif backup team to configure Data Protector on client servers and cell manager servers.
  • Installing and configuring theVMwareV Sphere and creating clusters for High Availability (HA) and Dynamic Resource Scheduling (DRS).
  • Building VM’s and new Templates for new Projects and allocating them to appropriate Resource pools.
  • Interact wif developers and Enterprise Configuration Management Team for changes to best practices and tools to eliminate non-efficient practices and bottlenecks. Coordinate wif Release Management regarding appropriate system releases among other development platforms.
  • Process monitoring and debugging using tool such as Nagios.
  • Hands on experience in using Python and all related libraries and wif PY Unit (Python Unit Testing Framework).
  • Analyzed functional requirements and documented teh user specifications and business rules.
  • Provide CM and Build support for applications, built and deployed to lower and higher environments.
  • Deployed Chef, Puppet Dashboard for configuration management to infrastructure.
  • Worked together wif developers to establish and apply appropriate branching, labeling/naming conventions using Subversion (SVN) source control.
  • Analyze and resolve conflicts related to merging of source code for SVN.
  • Implement, maintain and support reliable, timely and reproducible builds for project teams.
  • Maintain build related scripts developed in ANT, shell and Python.

Confidential, Boston, MA

Senior Linux/System Administrator

Responsibilities:

  • Configured System imager for Linux Servers and used it for Cloning, software distribution and OS updates.
  • Adding/expanding new storage to existing/new systems using LVM, VERITAS Volume management VXVM and VxFS on Linux/SUN servers.
  • Worked on Solaris servers supporting all teh OS administration, application and hardware issues.
  • Very good working experience on Red hat Satellite Server upgrading and patching.
  • Implemented upgrade of servers using Red hat Satellite Server.
  • Worked wif Technologies: Python, QT, QML, C++, QNX and UML.
  • Documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using VERITAS Cluster Server in SAN environment Setup NFS file systems and shared them to clients.
  • Configuration automation using Docker containers.
  • Used AWS Beanstalk for deploying and scaling web applications and services developed wif java, PHP, Node.js, Python, Ruby and Docker on server such as Apache.
  • Experienced in hardware configuration of HP and Dell hardware and deployed RHEL 7.x/6.x/5.x using customized kickstart profiles via load tools such as Foreman, Satellite server.
  • Setup new repos and channels on satellite server.
  • Updating RHEL servers, applying security patches using satellite server
  • Setup GIT versioning control system to maintain centralized code repos for various Management tools such as puppet, ansible, etc.
  • Translating automotive infotainment designs from Python into implementations in C++ and QML using QT 5 and Linux
  • Working wif Ansible to run ad hoc commands, writing playbooks for configuration management, software deployments, security setup
  • Installed and configured Jenkins for Automating Deployments and providing a complete automation solution.
  • Involved in development of Test environment on Docker containers and configuring teh Docker containers using Kubernetes.
  • Automated teh provisioning of Azure cloud using ARM Templates, AWS Cloud using Cloud Formation and using Terraform.
  • Developed Networking policies for Docker containers. Worked on open-source development tools like Docker Containers, Mesos and Kubernetes.
  • Maintained and developed docker images for a tech stack including Cassandra, Kafka, Apache, and several in house written java services, running in Cloud on Kubernetes.
  • Migrated .Net application to Microsoft Azure Cloud Service Project as part of cloud deployment.
  • Design and implement asynchronous processes for delivery XML files (invoices) to Tax Authority. These processes were connected using Azure Queues to communicates each other.
  • Implemented new projects builds framework using Jenkins & Maven as build framework tools.
  • Implemented a Continuous Delivery framework using Jenkins, CHEF and Maven in Linux environment.
  • Developed and maintained teh Continuous Integration and Deployment systems using GIT, Jenkins, ANT, Maven, Nexus, Nagios and Chef.
  • Scheduling of automatic repetitive Jobs, and Shell Scripts wif Crontab.
  • Monitoring Virtual memory, Swap management, and Disk and CPU utilization by using various monitoring tools.
  • Implemented Identify command in C\C++ on Linux 32 bit and 64-bit environment to identify teh devices and hardware.
  • Implemented rapid provisioning and life cycle management for Red hat Linux using kickstart and puppet.
  • Used puppet for central management of Linux configuration files and software package management.
  • Installed Red Hat Linux on Intel Machines, Configured File Systems and Raw - Devices
  • Work closely wif Storage and Network teams to ensure highest level of dependability across VMware infrastructure
  • Troubleshooting Issues related to ESX host, vCenter, HA (High Availability), DRS, and VMware Update Manager.
  • Disk space increase using VMware converter and importing of virtual server using VMware Converter.
  • Involved in replacing existing manual deployment and management processes wif AWS OpsWorks which uses CHEF to automate how servers are configured, deployed, and managed across AWS EC2 instances.
  • Written wrapper scripts to automate deployment of Chef cookbooks on nodes and running teh chef client on them in a Chef-Solo environment.
  • Integrated source control and versioning of cookbooks and recipes by using GIT.
  • Evaluated Chef framework and tools to automate teh cloud deployment and operations.
  • Automated Nagios alerts and email notifications using python script and executed them through Chef.
  • Worked wif Chef to all servers and used teh chef node database to drive host configuration, DNS zones, monitoring, backups.
  • Used Terraform Interface between Jenkins and AWS to implement auto scaling, cloud watch in Jenkins.
  • Installed and used Chef Enterprise Server on premise, workstation and bootstrapped teh nodes using knife and automated by writing Chef Recipes and Cookbooks wif test-kitchen/chef spec.
  • Automate Deployment using configuration Management tool like OpsWorks - Chef to provision Amazon AWS Instances to enable continuous Deployments.
  • Managing teh ESXi servers using teh vSphere client and Center for managing teh multiple ESXi servers
  • Building teh Red hat Linux server in VMware ESX client through vSphere client
  • Storage mapping on red hat Linux and create teh Volume group, Filesystems using Logical Volume manager
  • Installed/Configured Red hat Linux cluster & configuring teh cluster resources
  • Adding storage to teh cluster disks and increasing/ decreasing teh filesystem in RHEL.
  • Creation of Fence devices in teh cluster, Failover domains for teh cluster and Flip over/ Failover test in between teh nodes in teh cluster
  • Working on SAN storage on ESXI servers and assigning teh LUNs to teh Virtual Machines running on teh ESXi server
  • Maintained Chef and Ansible servers and managed application dat can use ServiceNow data to bring computers into teh desired state by managing files, services, or packages installed on physical or virtual machines using Ruby and Python scripts.
  • Created customized Docker images and Installed Docker-Registry for upload and download of Docker images, worked on Docker-Compose,Docker-Swarm.
  • Worked wif CI/CD system wif Jenkins on Kubernetes container environment, utilized Kubernetes and Docker for teh runtime environment for teh CI/CD system to build, test and deploy.
  • Experience in setting up teh pipeline as a code, between Git (Hub/Lab) to Jenkins to Artifactory to XL Deploy.

Confidential, Plano, TX

System Administrator (Linux, VMware)

Responsibilities:

  • Extensively worked on server build, Configuration and Administration of Sun/HP/Dell servers from scratch wif OS Linux(Red Hat & Suse)
  • Performed configuration, monitoring, support, tactical planning of rollouts, migrations, and day-to-day management of teh HP server infrastructure.
  • Automated server building using System Imager, Kickstart and Jumpstart on Sun and Ignite on HP servers
  • Configuring and troubleshooting SAMBA SERVER INLinux.
  • Monitoring Server performance and troubleshooting server related problems.
  • Worked wif database administration staff to ensure optimal performance of databases, and maintain development applications, databases, and ensure database backup completed successfully.
  • Implementation of RAID techniques and teh creation of Disk groups and volumes using VERITAS Volume Manager 4.1, solstice Disc Suite and logical volume manager for managing disks and file systems
  • Installing operating system patches, packages, system customization and documentation
  • Implemented Red Hat Cluster Suite wif GFS and RHN Satellite Server in teh Development and Production environments
  • Configured and implemented NIS, DNS master Slave servers along wif required clients
  • Building, Installing and configuring Veritas Cluster Server and HP MC service Guard
  • Associated wif DBAs for installation of Oracle database (RAC) onLinuxservers & for tuning, backup and restore
  • Experience wif EMC Storage on Solaris andLinuxservers (i.e., familiar wif Navisphere, Access Logix, Host Agent, Power Path, Snapshot and Cloning, SAN Copy. Setup and maintain Logical Volume Manager (LVM), Created Physical volumes, Volume groups, Logical volumes and Mirrored root Disk
  • Performing VMotion and storage VMotion, Creating Clusters for High Availability and Dynamic Resource Scheduling, HA, DRS.
  • Played a vital role in Creating Virtual Machines, cloning virtual machines, converting P2V (used standardVMwareconverter tool), VM-Provisioning (Linked clones, thin disks, de-duplication) taking Snapshots of virtual servers.
  • Experience on creating host profiles and deploy to hosts in aVMware cluster.
  • Provide technical assistance to teh application development area and co-workers about system analysis, design, and programming.
  • Created a design document on what roles and permissions need to be created for users in teh new vSphere 6.0 environment.
  • Installed, configured, and maintaining services Apache, Web servers.
  • Configured ESX 5.x, 4.x wif SAN Attached storage (LUN Assignments, Data stores)
  • UtilizedVMwareConverter for Physical to Virtual/Virtual to Virtual conversion/Physical to Physical conversion.
  • Configuring HA for VERITAS Cluster Server NFS, send-mail and MQ series.
  • Creating Virtual switch and configuring Virtual switch settings and policies.
  • Involved in P2V, V2P Migration using Stand AloneVMwareConverter Server and Plate Spin.
  • Managing and implementing various projects wif all phases of life cycle for virtualization.

Confidential, Cincinnati, OH

Linux/UNIX/VMware System Administrator

Responsibilities:

  • Installation, configuration and upgrade of Red hatLinux3/4/5, AIX 5.3, VMware 4/5 operating systems.
  • Configured and installed Red hatLinuxServers using jumpstart, Ignite, and Kickstart.
  • Extensive use of Logical Volume Manager (LVM), creating Volume Groups, Logical volumes and disk mirroring in HP-UX, AIX andLinux.
  • Worked on installing and configuringVMware/ESX Servers for virtualizations.
  • Configured LinuxBonding. Worked on Storage multipathing.
  • Responsible for writing, maintaining and documenting UNIX scripts to support smooth running of applications on teh production servers.
  • Supported Oracle RAC (Real Application Cluster) Servers running onLinuxwif GFS
  • Create automated Jumpstart environment for Linux standard builds for WEB, APP and DB servers.
  • Developed technical documents like handbooks, document installation configurations, and proposed resolutions for support processes.
  • Worked on HP Open View Service Desk (OVSD) tickets.
  • Planning to upgrade teh vSphere 5.5 environment to 6.0 soon wif two external PSCs in teh new environment
  • Raised tickets for any issues discovered during validation.
  • Installing and Managing ESX and ESXi Servers on HP & Cisco hardware.
  • Timely update of patches, drivers, and firmware's on all ESXi hosts.
  • Administration ofVMwareESX and ESXi Servers on Cisco UCS, HP Chassis 7000, DL380P GN8.
  • Deployed Chef Dashboard for configuration management to infrastructure.
  • Involved in Building and configuring Red Hat Linux Servers usingKickstartserver as required for teh project.
  • Implemented Nagios monitoring solution for mission critical server. Monitored teh server and application using Nagios, and Splunk.
  • Implemented and configured Nagios for continuous monitoring of applications in teh production environment and enabled notifications via emails and text messages. Wrote Unit test cases for unit, integration, and functional tests, run automatically by Hudson/Jenkins in teh builds triggered by each push to GIT.
  • Automate teh code review process and published teh results onJenkinsas well teh graph by comparing everyday nightly builds
  • Managed GIT repositories for branching, merging, and tagging.

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