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Sr. Linux System Administrator/devops Engineer Resume

Hicksville, NY

PROFESSIONAL SUMMARY:

  • 8 years of Strong Experience in SYSTEM Administration with expertise in installing, upgrading and configuring Red Hat Linux 3.x, 4.x, 5.x, 6.x and 7.x, Solaris (8,9,10), Windows NT/2000/2008.
  • Expertise in Installation, Configuration, Tuning, Backup, Crash recovery, Upgrades, Patching, Troubleshooting, Monitoring System.
  • Performed Kick start, jumpstart, cobbler over network and maintained installation server, boot server and profile server.
  • Hands on experience on various Linux kernel versions and their upgrades.
  • Experience in Installing Firmware Upgrades, kernel patches, system configuration, performance tuning on Unix/Linux systems.
  • Experience in configuration of NIS, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, and postfix, send mail, ftp, remote access, security management and Security trouble shooting skills.
  • Extensive knowledge in installation, configuration and support of Web Sphere, Tomcat, Apache Web server, LDAP and mail server.
  • Experience with Veritas Volume Manager (VxVm), Veritas File systems ( VxFS), Veritas Net Backup, Veritas Clustering with SAN, NAS environment.
  • Configuration management with various automation tools like Puppet, Chef, and Ansible.
  • Provisioning the cloud servers using Amazon EC2, Open Stack.
  • Extensively worked on Hudson, Jenkins and Bamboo for continuous integration and for End to End automation for all build and deployments.
  • Experience in using Bug tracking tools like JIRA, Remedy, HP Quality Center and IBM Clear Quest.
  • Automated, designed and implemented continuous integration using GIT, Jenkins, puppet.
  • Worked with System Engineers, QA, business and other teams to ensure automated test efforts are tightly integrated with the build system and in fixing the error while doing the deployment and building.
  • Expertise in Querying RDBMS such as Oracle, MY SQL and SQL Server by using SQL for data integrity managed builds and deployments and Have good knowledge of utilizing cloud technology Microsoft Azure.
  • Excellent knowledge in build tools like MAVEN and ANT for the building of deployable Artifacts.
  • Configuring and maintaining virtual server environment using VMWARE ESX/GSX, KVM, XEN, VSphere, and VCenter and also have knowledge of Citrix and IIS.
  • Working knowledge in scripting for automation, and monitoring using Shell, Python & Perl scripts.
  • Experience in writing shell scripts to automate the administrative tasks and management using cron.
  • Responsible in managing all aspects of the software configuration management process including code compilation, packaging, deployment, release methodology and application configurations.
  • Experience in Creation and managing user accounts, security rights, disk space and process.
  • Team player with good management, analytical, communication and interpersonal skills.

TECHNICAL SKILLS:

Operating Systems: RHEL 4/5/6/7, Cent OS 5/6/7, Solaris, IBM - AIX 5.X, windows.

Web & App Server: Apache/TOMCAT, Apache JBoss, Nginix, Web logic/Web sphere

Languages: Shell Scripting, Python, Ruby, PERL, PowerShell.

Storage Devices: SAN, NAS, EMC Power Path 4.0, VERITAS SAN Point Manager, RAID Manager.

Networking: TCP/IP, DHCP, LDAP, FTP, SMTP, TELNET, SAMBA, DNS, SMTP, NFS, IP Tables, SELinux.

Configuration Management Tools: Chef, Ansible, Puppet, Ant, Maven.

Virtualization: VMware ESX, VSphere Client, XEN, KVM.

Monitoring Tools: Splunk, Nagios, Zabbix.

Dev ops Tools: Jenkins, Bamboo, AWS, Docker, Vagrant, Netcool, JIRA, Symmantic Net backup, HP Quality Center, Open Stack, Azure.

Databases: MYSQL, NOSQL, AMAZON REDSHIFT, MANGODB, DYNAMODB

PROFESSIONAL EXPERIENCE:

Confidential, Hicksville NY

Sr. Linux System Administrator/Devops Engineer

Responsibilities:

  • Created the udeploy templates for components and applications, onboarded around 200 apps into udeploy to achieve continuous integration.
  • Troubleshooting with the agent’s problem in udeploy server
  • Disc usage maintenance of udeploy server
  • Achieved continuous Deployment using IBM Udeploy. Integrated Udeploy with nexus and Jenkins to achieve CD.
  • Created applications, components and processes to design the flow for automated deployments in Udeploy.
  • Implemented CI process for Nodejs applications.
  • Worked on Docker and Vagrant for different infrastructure setup and testing of code.
  • Supported tomcat and WebSphere for applications deployment and troubleshooting environmentManaged staging and testing environments by having on eye on various metrics like CPU utilization, memory utilization, disk space, logs etc.
  • Documented all the useful info about the release, software versions, changes implemented in current release, Defects fixed, Labels applied.
  • Worked closely with Scrum teams (Dev, QA) to make sure to bridge any gaps. Resolve any issues arise for commits, Build, Deployment on day to day basis.
  • Provided system support for production web, application servers, and database.
  • Performed day-to-day operations that protect the integrity, confidentiality, and availability of IT assets and technology infrastructures of the organization: log analysis, and development and implementation of enterprise class security solutions and policies.
  • Performed upgrades, data backup/restore, and maintenance of VMs, containers, file systems, and databases.
  • Experience in provisioning, installation/configuration, operation, and maintenance of systems hardware and software and related infrastructure.

Environment: RHEL 5,6,7, Ubuntu, SELinux, CentOS 6/7, GIT, IBM Udeploy, Apache ANT, Maven, Jenkins, Apache Tomcat, Shell Script, Unix/Linux, JIRA, Windows, JBoss, Web Sphere, AWS, Ant, Maven, Kerberos, Docker, Splunk, AppDynamics.

Confidential, PA

Sr. Linux System Administrator/Devops Engineer

Responsibilities:

  • Worked on Red hat Linux 6.x/7.x and Centos 6.x/7.x administration.
  • Systems monitoring and administration of Servers for day-to-day problems, patches, user administration, hardware failure, monitoring log files, backup, software upgrade, configuration changes and documentation.
  • Automation of configuration and management through Puppet.
  • Deployed Puppet, Puppet Dashboard, and Puppet DB for configuration management to existing infrastructure.
  • Expertise in AWS, experience in implementing new AWS instances and working with EBS and S3 storage, IAM.
  • Launching and configuring of Amazon EC2 Cloud Servers using AMI's (Linux/Ubuntu).
  • Installed and configured monitoring tools Nagios for monitoring the network bandwidth and the hard drives status.
  • Developed automation scripting in Python (core) using Puppet to deploy and manage Java applications across Linux servers.
  • Worked on puppet to create manifests and Modules to automate deployments and install rpm’s.
  • Involved in developing custom images on Cloud using AWS images and on ESX using Templates and involved in building physical servers using Kickstart PXE Boot and Jumpstart.
  • Worked with Splunk dashboard.
  • Involved in developing custom images on Cloud using AWS images and on ESX using Templates and involved in building physical servers using Kickstart PXE Boot and Jumpstart.
  • Supported AWS Cloud environment with 900+ AWS instances and configured Elastic IP and Elastic storage.
  • Build of application and Web servers in the AWS for migration setup and making sure they are interconnected with respective network elements.
  • Configuring the web servers based on the developer’s requests and Installed Nagios on Linux servers.
  • Used ANT and MAVEN as build tools on Java projects for the development of build artifacts on the source code.
  • Build additional Docker Slave nodes for Jenkins using custom built Docker images and instances.
  • Incorporated Npm and Grunt build steps in the Jenkins workflows and removed the generated artifacts from Git to ensure at build time all artifacts were being generated from the grunt builds.
  • Performed all necessary day-to-day GIT support for different projects and responsible for design and maintenance of the GIT Repositories, views, and the access control strategies.
  • Experience with Virtualization technologies like Installing, Configuring, and Administering VMware ESXi 4.1/5.0/5.5 environments.
  • Worked on SELinux, Kerberos, on Linux and Administrating NFS client/server, SAMBA shares.
  • Worked on resolving production issues and documenting Root Cause Analysis and updating the tickets.
  • Managed several Linux computing cluster nodes using cluster management tools like torque and condor.
  • Maintaining DNS and DHCP records and virtual networks in the organization using IPAM services.
  • Design and implementation of Disaster Recovery system for various servers and applications.
  • Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs.
  • Experience on using bash, awk and sed to automate log monitoring.

Environment: RHEL 5,6,7, Ubuntu, SELinux, CentOS 6/7, GIT, Chef/Puppet, Apache ANT, Maven, Jenkins, Apache Tomcat, Shell Script, Unix/Linux, JIRA, Windows, JBoss, Web Sphere, AWS, Ant, Maven, Kerberos, Docker, Ruby, Python.

Confidential, Sacramento, CA

Sr. Linux Administrator/Automation Engineer

Responsibilities:

  • Installation, Maintenance, Administration and troubleshooting of Red Hat Enterprise Linux 5/6 and Oracle Enterprise Linux 5/6 systems.
  • Responsible for building of new servers which includes rack mounting, installation of OS, configuring of various OS-native and third-party tools, securing of OS, configuring, job scheduling.
  • Installed and configured an automated tool Puppet that included the installation and configuration of the Puppet master, agent nodes and an admin control workstation
  • Worked on installing and managing different monitoring tools like Nagios and Splunk, Check mk.
  • Worked closely with the development and operations organizations to implement the necessary tools and process to support the automation of builds, deployments, testing and infrastructure (infrastructure as code) using Puppet andWorked on Shell & Python scripting.
  • Familiar with Open Stack concepts of user facing availability zones and facing host aggregates.
  • Performed deployments of Amazon EC2 instances in AWS environment and implemented security groups, administered VPCs.
  • Build about 200 Linux servers in a cloud environment using AWS EC2.
  • Automated server provision to modify server parameters and enable bulk server provisioning.
  • Developed automation scripting in Python using Puppet to deploy and manage applications across servers.
  • Bootstrapping instances using chef and integrating with auto scaling and Manage the configurations of multiple servers using chef.
  • Written multiple recipes and also customized facts for efficient management of the chef clients.
  • Used chef to configure and manage infrastructure and Wrote cookbooks to automate the configuration setups.
  • Experienced in troubleshooting various log issues on TOMCAT, JBOSS web sphere and ZEND servers through log rotation and secure removal of older logs.
  • Worked on Grub, PXE boot, Kick start, Yum, RPMs, LVM, Boot from SAN, file system Configuration.
  • Configured and deployed patches, upgrades, bug fixes on both physical and virtual Redhat Linux servers using satellite servers.
  • Experience in administering VMware Infrastructure Client 3.5 and VSphere 4.0, VCenter.
  • Provisioning GIT and SVN configuration management environment for different developer teams
  • Troubleshooting OS / Hardware related issues and monitor server health on a day-to- day basis. Maintained maximum uptime and high performance for Enterprise Production, Development, and QA environment servers.
  • Performed installation, configuring, tuning, and troubleshooting of Apache web server, Tomcat and WebSphere application servers.
  • Optimizing the scripts and automation of the jobs using BASH scripting.
  • Created L1, L2 & L3 Support structure and implemented the 24/7 support.
  • Perform ongoing performance tuning, hardware upgrades, and resource optimization as required.
  • Provided solutions on patch management of 3500 Linux servers.

Environment: Red Hat 5.x, 6.x, Centos 5.x and VMware ESXi 5.1, VCenter, VSphere Client, Bamboo, Nolio, Puppet, shell, Tomcat, Jboss, Hudson, Python, Perl, AWS, VPC, EC2, S3, EBS, IAM, ELB, Cloud Formation and Cloud Watch.

Confidential - Houston, TX.

Linux System Administrator

Responsibilities:

  • Performed Installation, configuration of RHEL 5/6, Centos 5/6 and AIX, and Redhat Linux Servers using NIM, Kickstart
  • Handling the day-to-day Operations, Troubleshooting& Solve Server Problems in LINUX.
  • Installed/configured/maintained the Linux servers NIS, DNS, NFS, Send mail, apache, ftp, sshd.
  • Installed host firewall IPtables for Red hat Linux.
  • Installed Puppet client software on RHEL 6.x servers and established a communication between master and client through SSL certification.
  • Used Iptables to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel.
  • Pushing all configuration management into puppet to allow for rapid roll-out of new infrastructure.
  • Worked on VERITAS Cluster Server and VERITAS Volume Manager.
  • Developed the scripts to push patches, files and maintain configuration drift through the Puppet Tool.
  • Automation of various administrative tasks on multiple servers using bash script.
  • Worked on cloning virtual machines in VMware environment using Virtual Infrastructure client 3.5 and VSphere 4.0.
  • Administered Backup and Restore operations using Veritas NetBackup 5.1.
  • Done P2P migration and P2V migration from physical to physical and physical to virtual servers.
  • Maintain and support Citrix infrastructure (XenServer, XenDesktop and XenApp) composed by (16) physical server, (37) virtual Win2k8r2 & (2) NetScaler MPX7500.
  • Add group permissions within Citrix environment Conduct regular Citrix maintenance.
  • Monitoring CPU, memory, iSCSI disks, disk controllers, physical disk, HW and SW RAID, multipath, file systems, network using the tool NAGIOS.
  • Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, and Web Sphere servers.
  • Implemented SUDO, SSH and other security tools and implemented SOX (Sarbanes Oxley) security compliance.
  • Proficient in installation, configuration and maintenance of applications like Apache, JBOSS and Tomcat.
  • Monitored and troubleshot different performance related issues using performance monitoring utilities like IOSTAT, VMSTAT, TOP, NETSTAT and SAR.
  • Configured and installed apache web servers on the different Linux and UNIX servers.
  • Monitored system logs and important messages for errors and warnings of the hardware and software failure.
  • Coordinated with the Storage, Network and Hardware teams on server provisions (HP Proliant DL385/585 G5, G6 servers, and HP BL 465C G5 blade centers) and dell M520 and M620.
  • Building & configuring Red hat Linux systems over the network, implementing automated tasks through crontab, resolving tickets according to the priority basis.
  • Planning and implementing system upgrades including hardware, operating system and periodical patch upgrades.
  • Expertise in Linux backup/restore with tar including disk partitioning and formatting.

Environment: Red hat EL 5.x, 6.x, Logical Volume manager, Centos 5/6, Server Dell R310, R410, R910 servers, Oracle Linux servers (HP Proliant DL 585, BL 465/485, ML Series) DNS, NFS, SMTP, Web server Apache 1.3x, Application server JBoss, Nagios.

Confidential

Linux/Unix System Administrator

Responsibilities:

  • Administration of RHEL 4/5 that includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
  • Experience in Creating, cloning Linux virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
  • Experience with setting up Linux servers for Oracle Real Application Clusters and configuring SAN based mount points.
  • Installed VERITAS volume manager and implemented various RAID levels, logical volume creation, mirroring and file systems.
  • Implemented day-to-day tasks in Redhat Linux that include upgrading Rpms, kernel, HBA driver, configuring LVM file system, printing issues, connection / network issues etc.
  • Created users, manage user permissions, maintain User & File System quota on Redhat Linux.
  • Maintained Separate spread sheets for physical and virtual servers.
  • Configuring NFS, NIS, NIS+, DNS, Auto Mount & Disk Space Management on SUN Servers.
  • Configure dynamic and static network settings for IPv4 and filter packets, Review file system management concepts, removable media and configure NFS shares with Autofs.
  • Expertise in Performance Monitoring and Performance Tuning using Top, prstat, sar, vmstat, ps, iostat etc.
  • Created and Administer User accounts on the existing Citrix Presentation server farm.
  • Build and configuration, Maintained and monitored load balancing of Citrix XenApp and Xenserver.
  • Hard ware maintenance and System Administration on all DELL PE servers.
  • Expertise in creating and managing Logical Volume Manager in AIX, HP-UX and Red hat Linux.
  • Setting up servers with CUPS on all manager servers (RHEL 4.x, 5.x) for printing and Created scripts to monitor print queues and notify / alert administrators if there are any idle queues and enable / disable them to restart print queues.
  • Experience in Developing KORN, BASH and power shell scripts to schedule and automate cron jobs and system maintenance
  • Installed and Configured Nagios from scratch and written custom scripts for monitoring.
  • Deployed latest patches for Linux and Application servers, performed Red Hat Linux Kernel Tuning.
  • Installing MySQL on Linux Server and securing installation.
  • Installation and Handling Apache, Web logic and Tomcat Web servers.
  • Setup and configure Veritas Net backup 5.x, 6.x,Net Backup server / client & tape libraries.
  • Extensively worked with auto mount, NFS mounts. Mounted home directories through auto mount and auto mount failures, user login failures related production issues.
  • Maintaining production critical servers running Solaris UNIX, Linux supporting Oracle database and Web services. Providing 24x7 supports.
  • Managed patches configuration, version control, service pack and reviews connectivity issues regarding security problems.

Environment: RHEL 4/5, CentOS 5, Nagios, VMware, SAN EMC Clariion CX 700/ CX 600/ CX 500, EMC DMC 2000/ 3000, NetApp NAS 3000, Net backup 5.0, Sun Enterprise Server(E2900, E4500, E6900),

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