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Linux Systems Administrator Resume

Warrendale, PA

SUMMARY:

  • Several years experience in installation, Configuration, Management of Linux OS (RHEL, CentOS, Ubuntu), Windows Servers in an Agile environment and engineering the automation of OS in a DevOps environment such as (DEV, TEST, STAGE & PROD).
  • Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine - tuning on UNIX Red Hat Linux System.
  • Extensively worked with VMware ESXI 5.1/5.5/6.0, vCenter Server, Host Clustering with HA, DRS, Replication Manager 5.x/6.0, Site Recovery Manger, Vmotion, Physical to Virtual Migration and Managing SAN Datastores with, ISCSI, NFS & FC.
  • Created and maintained user account, profile, security, right, disk space and process monitoring.
  • Have good hands on experience on some of the monitoring tools like Nagios, and Splunk.
  • Extensively written bash script for various tasks automation.
  • Have good hands on experience working on Could platforms like VMware VCaC and Amazon Web Service.
  • Expertise in VMware virtual environment.
  • Have good experience on various Devops tools.
  • Performed Remote system administration using Network protocol tools like SSH, HTTP, RSH, TELNET, SCP, FTP, SFTP, S secure connection and Rlogins.
  • Experience in documenting and supporting high availability, business persistence, fail-over, fail-back.
  • Configured Networks using DNS, NIS, NFS, FTP and DHCP, troubleshooting network problems such as Sub netting Firewall related on TCP/IP providing support for users in solving their problems.
  • Experience in installing and configuring kick start in Linux.
  • Day to Day job included but not limited to handling Tickets, Monitoring, Troubleshooting and maintenance.
  • Deployed Docker Engines in Virtualized Platforms for containerization of multiple apps.
  • Managed all the bugs and changes into a production environment using the Jira tracking tool.
  • Involved in setting up Jira as defect tracking system and configuration various workflows customization and plugins for the Jira bug/issue tracker.
  • Strong Knowledge on source controller concepts like Branches, Merges and Tags.
  • Experience NIC bonding/NIC Teaming configuration in Linux /UNIX/WINDOW/VMware system to increase the bandwidth or redundancy based on requirement by the application.
  • Managing DNS, LADP, FTP, Tomcat & Apache Web servers on Linux servers.
  • Expertise in implementation and maintenance of Apache HTTPD, SMPT, DHCP, NFS, NIS+ LDAP, DNS,SAMBA,SQUID,Postfix, send mail, FTP, Remote Access Security Management using VERITUS Volume manager 5.1/6.0 and Solstice Disk Suite on Solaris and experience in RAID configurations.
  • Experienced in Backup Tools like NetBackup, Veeam Backup and Replication Suite.
  • Installed, Configured, Managed Monitoring Tools such as Splunk, Nagios, iCingafor Resource Monitoring /Network Monitoring/Log Trace Monitoring.
  • Worked with Bash Scripts, Pearl Scripts (hash and arrays), Python programing for deployment of Java applications on bare servers or Middleware tools.
  • Strong appetite for learning new technologies with positive attitude.

TECHNICAL SKILLS:

Operating System: RHEL/CentOS 5.x/6.x/7, Ubuntu/Debian/Fedora. Sun Solaris 7/8/9/10, Windows, Server 2003/2008/2012

Languages: Shell, Bash Perl, Ruby and Python Scripting

Bugs Tracking Tools: Jira, Fisheye, Crucible, Rally, Remedy and IBM Clear Quest, Bugzilla, HP Quality Center

Version Control Tools: Subversion, GIT, Tortoise SVN, Visual SVN

Web Technologies/ Languages: Servers, JDBS, JSP, XML, HTML, Java Script, Java/J2EE, C, C++, Ruby, Perl Scripting, Python, Shell, Bash Scripting.

Monitoring Sysmon: MRTG, Nagios, Zenoss

E-mail servers: QMail, Postfix

PROFESSIONAL EXPERIENCE:

Confidential, Warrendale, PA

Linux Systems Administrator

  • Configured and deployed Patches, Upgrades, bug fixes on both physical and virtual Red Hat Linux servers using Satellite Server/Spacewalk.
  • Installed, Configured, Managed Monitoring Tools such as Oracle Spacewalk, Nagios, for Resource Monitoring /Network Monitoring/Log Trace Monitoring.
  • Managing DNS, LADP, FTP, Tomcat & Apache Web servers on Linux servers.
  • Extensively worked with VMware ESXI 6.0, vCenter Server, Host Clustering with HA, DRS, Replication Manager 5.x/6.0, Site Recovery Manger, Vmotion, Physical to Virtual Migration and Managing SAN Datastores with, ISCSI, NFS & FC.
  • Installed, Deployed Oracle Linux 5.x/6.x/7.x, CentOS and installation of packages and patches for Oracle Linux Servers.
  • Applied patches every quarter regularly to meet audit requirements using Oracle Spacewalk server, Red Hat, Oracle Linux, Satellite server, up2Date, YUM, RPM tools.
  • Yum configuration & package installation through YUM.
  • Installation of RPM packages to upgrade Linux packages.
  • Worked with a team of datacenter Support to maintain OS and Hardware.
  • Managed system configuration and maintenance, problem troubleshooting, system and program security, application and program management, planning and directing upgrades, and testing operation to ensure optimum system functionality.
  • Perform system administration; security, file and directory permissions, adding/deleting users, etc.
  • Perform software administration; vendor supplied, third-party, and licensing.
  • Ensure system optimization; monitor, troubleshoot and resolve performance issues as they relate to; process, CPU, memory, i/o network, and web server.
  • Assist in the research, evaluation, and purchase of future hardware platforms.
  • Work closely with the application teams to provide integrated planning for operating system upgrades, database upgrades, application upgrades and hardware migrations.
  • Add optimizations to the applications when and where necessary (e.g. logging, security, performance)
  • Continually update architecture and process documentation.
  • Installed Symantec Endpoint Protections (SEP) on Linux Client servers.
  • Installed Munge and Slurm services on several Linux servers.
  • Installed Control M server and Control M Agent on Linux server.

Confidential, Waltham, MA

Sr. Systems Admin (Linux, Devops, VMware)

  • Installed, Deployed Red hat Enterprise Linux 6.x/7.x, CentOS and installation of packages and packages and patches for Red Hat Linux Servers,
  • Assisted in administering VMware SRM to accommodate virtual machine replication.
  • Performed vMotion and Storage vMotion of VMDK and VMF files to target landing zones.
  • Performed p2v of standalone Windows 2008/2012 R2 machine to virtual instances using VM converter and Platespin.
  • Leveraged Docker Engine to run Multiple Tomcat Instances as Containerized AppServers.
  • Automated Weekly releases with ANT/Maven scripting for Compiling, Debugging and Placing Builds into Maven Repository.
  • Worked on Integration and Production AWA environments.
  • Configured SSL / TLS in every application, layer and configuration of mutual authentication, manually using puppet.
  • Experience in System Administration, System Builds, Server Builds, Installs, Upgrades, Patches, Migration, Trouble Shooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on Red Hat Linux Systems.
  • Installing, upgrading, maintaining and configuring Red Hat Enterprise Linux on Servers using Custom and Kick start installation.
  • Worked with file/disk encryption technology/products on servers, Data Security tools, and Files System Encryption.
  • Installation of RPM packages to upgrade Linux packages.
  • Wrote Scripts to Monitor Variety of Services & Hash / Array to insert/Delete/Modify content in multiple servers.
  • Implemented multi Node OpenStack KILO Architecture on KVM Using Latest Release of Ubuntu with Service like Horizon, Nova, Neutron, Glance, Cinder, Keystone & Swift.
  • Installation, Configuration, and Administration of WebSphere and Apache Servers.
  • Having production experience supporting and deploying to web application servers such as, RedHat, Apache, Tomcat, and Apache HTTPD servers.
  • Created Word documents for Installation Process of Application on different platform like Linux and windows and uploaded on SharePoint.
  • Created Wiki for Installation and Migration of servers in Virtualization environment and cloud environment.
  • Managed Run Books for Migration and Decommission of Server (Linux and Window)
  • Tune Linux Kernel using kernel parameters as requested by database administrator. Configured Kernel Parameters for Oracle Database install.
  • Conducted Linux System security and auditing and did Performance Monitoring and Tuning.
  • Worked on Solaris container Technology: Created local global zones
  • Solaris zones configuration for application: Server Build from the scratch with CD and Automated Installation: Implemented Security Hardening per company policy: Trouble shooting system and user problems
  • Added Service Groups and resources based on then requirement with appropriate dependencies, Documented in change design/Architecture diagram of Veritas Cluster Servers
  • Automate infrastructure using chef to manage and deploy private cloud instances
  • Setup and install chef workstation chef Server and Bootstrapping the chef Client using knife
  • Deploy Apache/Tomcat application using chef.
  • Performed Continuous Integration, Building and administration using Jenkins.
  • Provided administrative supports and performed branching and merging operation using GIT
  • Used Bash, Perl, and Python Shell Scripting for Monitoring and to automate the build and deployment process.
  • Creating customized Kickstart profiles for each server and making ISO to build the server.
  • Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satellite server, up2Date, YUM, RPM tools.
  • Configure services running on Red Hat Enterprise Linux deployed through cloudFroms and Red Hat Satellite.
  • Installing RMP packages on Red hat Linux Security Servers and applying patching on RHEL 6&7 versions.
  • Performance Tuning and Management for Linux/AIX server and working with the application / database team to resolve issues.
  • Worked on resolving production issues and documenting Root Cause Analysis and updating the tickets using BMC Remedy.
  • Worked on Installation/Configuration/Administrated VMware ESCi 5.1/&6.0 and migrated existing servers into VMware Infrastructure.
  • Virtualized the servers using Docker for the test environments and dev-environments needs, also configuration automation using Docker containers.
  • Installation of custom Docker containers and Docker consoles for managing the application life cycle.
  • Working on Ansible Playbooks for Mapping of hosts to a set of roles.
  • Reporting to management on incidents, find problematic servers and act on resolution.
  • Worked with JIRA for Creating Projects assigning permissions to users and groups for the projects & Created Mail handlers and notification Schemes for JIRA.
  • Scanning the newly assigned LUNs to the serves and assigning them to volume group and increasing the file system using Red Hat Volume manager.
  • Mounting & un-mounting the NetAPP storage LUNs to the Red Hat Linux servers and troubleshooting the issues encountered. Servers link increasing memory, disk, replacing failed hardware.
  • Provide drill down reporting for application teams to use in monitoring their application resourceusage/performance.

Confidential, Pittsburgh PA

System Administrator (Linux, VMware)

  • Creating the server profile and making the network and SAN virtual configuration using Virtual Connect in blade center C7000.
  • Creating the filesystems using RedHat volume manager and performing the heath check on regular basis for all Linux servers.
  • Scanning the newly assigned LUNs to the servers and assigning them to volume group and increasing the filesystem using RedHat volume manager.
  • Build, configure, upgrade and Install Red Hat 5/6/7, OS on physical and virtual servers.
  • Troubleshoot build, install, configuration, performance, monitoring and others process issues of the servers and the selected application environments.
  • Deploying the RedHat Linux production servers using VMware vSphere client.
  • Creating the VM shell and pushing the operating system using the kickstart server.
  • Creation of Kickstart images for the different version of RedHat Linux Operating system like 5.x & 6.x
  • HP blade center C7000 hardware management using ILO console.
  • Creation Link aggregation (LACP) with VLAN tunneling using virtual connect (VC).
  • Share upling set using LACP & VLAN tagging.
  • As a member of the team. Monitored the VERITS Cluster Server in SAN Environment.
  • Installation of node VERITAS clusters on Cisco USC Hardware, Configuring of Multipathing, l/O fencing, Service groups, Network bonding and heartbeat of cluster.
  • Troubleshooting on incidents ticket related to Veritas cluster.
  • Performance Tuning and Management for Linux/AIX server and working with the application / database team to resolve issues.
  • Tuning the Kernel parameters for the better performance of applications like Oracle, WebLogic etc.
  • Installing, Configuring, Stop and start scripts as Service for various 3rd party application apache/HTTPD, Tomcat, java, oracle client and WebLogic hosted on RHEL.
  • Creating the filesystem and RAW logical volumes for the Oracle RAC based on the requirement.
  • Upgrading the Kernel in all the RedHat Linux servers and creating images to boot from the Upgraded kernel.
  • Migration of RedHat Linux servers to 6.x version and working with the application team to resolve the issue post migration.
  • Troubleshoot the build issue during the Jenkins build process.
  • Fixing the OS Patching related issue and per-& post patching validation.
  • Installations & Upgrading RPM and YUM packages, patch and another server management.
  • Installed puppet agent on Linux servers and configure to communicate with Master Puppet Server.
  • Implement and manage continuous delivery systems and methodologies on AWS.
  • Maintained Virtual private cloud (VPC) using AWS and resources like Route53, NAT Gateway, RDS.
  • Worked on NAS and SAN concepts and technology. Also got knowledge in HA, Clustering, LAN.
  • Responsible for setting up a disaster recovery plan for the servers, which includes in development of programs for synchronized backups.
  • Written Ansible playbooks which are the entry point for Ansible provisioning, where the automation is defined through tasks using YAML format.
  • Worked on installing and configuring VMware/Esx Servers for virtualizations.
  • Knowledge and experience on Kerberos setup.
  • Configured and maintained network Multipathing in Solaris and Linux.
  • Installation /Configuration of ESXi 3.5, 4.x Servers and applying security patches to the ESXi servers.
  • Managing the ESXi servers using the Vsphere client and Vcenter for managing the multiple ESXi servers.
  • Building the Red Hat Linux server in VMware ESX client through Vsphere client.
  • Installed and Configured SAMBA Server in Linux for accessing the shared files from the windows environment.
  • Worked on SAN storage on ESXI servers & assigning the LUNs to the Virtual Machines running on the ESXi server.
  • Performed Sybase 11.5.1, Perl Scripting, NIS NFS, LDAP server, WebLogic, Apache Tomcat, EMC Storage SAN.

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