SUMMARY

• Having 7 Years of experience in Red Hat Enterprise Linux 5.X, 6.X and 7.X, Sun Solaris (8, 9 and 10), CentOS, OEL & HP - UX 10.x, 11.x.
• Experience in installation, configuration, upgrade, support & maintenance of Red Hat Enterprise Linux, Windows and Sun Solaris servers.
• Extensive administration experience in Storage Area Network (SAN) and Network Attached Storage (NAS).
• Network configuration for interfaces, switch ports, Ethernet cards, host names, net mask and routes details, DNS, NFS, LDAP, NTP and SNMP etc.
• Experience in implementing and configuration of Logical Volume Manager (LVM), Solaris Volume Manager (SVM), Veritas Volume Manager (VxVM).
• Deployment and Maintenance of Linux server systems to run OpenStack Cloud environment.
• Setting up continuous integration and build management environment using Jenkins, GitHub, docker containers and VirtualBox.
• Experience in working with configuration management tools like Puppet, Chef and Ansible.
• Experience in RPM Package Administration for installing, upgrading and checking dependencies in Red Hat.
• Experience in building servers using Kickstart for Linux, Jumpstart for Solaris.
• Proficient in handling Hardware issues, Migration and Data center operations.
• Knowledge on Kubernetes and docker for the runtime environment of the CI/CD system to build, test & deploy.
• Installation, Configuration & Management of Red hat Cluster Suite in Linux servers.
• Experience with virtualization and cloud infrastructure including VMware, Xen, KVM, AWS, Rackspace, etc.
• Experience includes SCM, DevOps Build/Release Management, AWS, Change/Incident Management and Cloud Management.
• Managing source code repositories like SVN, Git, GitHub, and Bitbucket.
• Strong experience in setting up RAID0, RAID1 and RAID5 for data redundancy.
• Deploy, Configure and Maintain compute on Azure cloud.
• Working experience with cloud infrastructure of AWS (Amazon Web Services) and computing AMI virtual machines of Elastic Compute Cloud (EC2).
• Experience with setting up Linux servers for Oracle Real Application clusters and configuring SAN based amount points.
• Responsible for providing service to customers such as OCC, NOC, ISG, ASG & TSG.
• Extensive Infrastructure monitoring experience with various CA products such as Spectrum Oneclick, Unified Infrastructure Management, Service Operations Insight, VAIM, HP SiteScope, etc.
• Project life cycle experience (SDLC) in all aspects of requirements specifications, design, code, test, deploy, maintaining.
• Strong experience in writing Bash and Perl scripts to automate business process.
• Experience in remote desktop connectivity and other applications.
• Hands on experience with project management tools like SharePoint and Confluence.
• Setting up HA Cluster using HA Proxy, Pacemaker, Corosync and iSCSI shared storage.
• Experience in Performance Monitoring of Kernel parameters, Memory, Disks, Network.
• Experience in maintaining/tuning/upgrading Web servers/Web application for Java applications.
• Experience on VMware Installation, configuration and monitored virtual environments with ESXi 4x, 5x servers and VirtualCenter 4x,5x.
• Expertise in setting up SSH, SCP, SFTP connectivity between Unix hosts.
• Work support to all Linux system problems 24x7 and resolving them in timely basis and ensuring high availability.
• Self-motivated, able to set effective priorities to achieve immediate and long-term goals and meet operational deadlines.

TECHNICAL SKILLS

Operating System: RedHat Linux (AS/ES 5/6/7), CentOS, Solaris 10/9/8, Debian, VMware ESX 2.x,3x ESXI 4.x,5x Windows 2003/2008/2012 etc.

Scripting Tools: HTML, Shell, Bash, Pyhton

Scheduling Tools: Autosys, Crontab

Web Servers: Apache, Tomcat, JBoss, Web logic & Web Sphere

Storage& File systems: LVM, iSCSI, Targetcli, RAID and Ext 2,3,4, XFS, NTFS, GFS2

Security: SSH, SSL, Sudo

Networkingand Protocols: TCP/IP, Telnet, VPN's, DHCP, NFS, HTTP, SNMP, LDAP, SMTP, ICMP, FTP, AutoFS

Email & DNS Servers: Postfix, Sendmail and BIND, Microsoft DNS

Database: Oracle, MySQL

Monitoring: CA Tools, Nagios, HP Performance Manager, System inbuilt utilities

Cloud Technologies: Amazon's AWS, Openstack, Nova, Keystone

Virtualization tools: VMware ESXi, MS Hyper V, KVM, Docker Containers

PROFESSIONAL EXPERIENCE

Confidential, NY

Sr. Linux Systems Administrator

Responsibilities:

• Installations, configuration, administration and maintaining of Red Hat Enterprise Linux (RHEL), CentOS, Ubuntu and Solaris systems.
• Performs automated installations of Operating System using Kickstart for Red Hat Enterprise Linux 5/6/7 and Jumpstart for Solaris 9/10 Linux.
• Planning, scheduling, and implementing OS patches on Linux and Solaris.
• Daily systems administration, resolving systems issues, supporting different groups and applications.
• Creating the file systems using logical volume manager.
• Maintaining system security utilizing SSH and SUDO.
• Scanning the newly assigned LUNs to the servers, assigning them to volume groups and increasing the file system size using logical volume manager.
• Monitoring servers for CPU utilization, memory utilization, and disk utilization for performance monitoring.
• Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center.
• Gathered VM requirements from the Performance Team, placed reservations and deployed Virtual Servers in Test and Production Environments.
• Managing various file systems using LVM and configured file systems through network using NFS, NAS, SAN/HPE methodologies and installed RAID devices.
• Patched different software using RedHat Package Manager and YUM.
• Install new/rebuild existing servers and configure hardware, peripherals, services, settings, directories, storage, etc. in accordance with standards and project/operational requirements.
• Manage VM's using VMware virtual center, Creating/Deploy VMs using templates/cloning.
• Working with Ansible, Puppet to automate Infrastructure as a code.
• Provides 24/7 on-call support on a weekly basis.
• Installed, configured, administered, and performed maintenance of web server Apache, HTIP server, FTP Server, Apache, Tomcat, application server, and web logic server.
• Reviewing system log files for errors.
• Used Kubernetes as an open source platform for automating deployment, scaling and operations of applications containers across clusters of hosts, providing container centric infrastructure.
• Associate with DBAs for installation of Oracle database on Linux servers & for tuning, backup and restore.
• Created shell/bash scripts for automation of many routine processes.
• Launching Amazon EC2 cloud instances using Amazon Images (Linux/ Ubuntu) and configuring launched instances with respect to specific applications.
• Experience on several Docker components like Docker Engine, Hub, Machine, Compose and Registry.
• Hands on experience in monitoring Linux instances using Nagios, CA Tools and Splunk.
• In Ansible, working with playbooks, tasks, roles, facts and templates for VAR files. Also, in Ansible configured files by conditions by keeping dynamic values and triggering YAML files.
• GIT administration like providing access for branches and GIT repositories.
• Configuration, implementation and administration of clustered servers on Linux environment by using pacemaker.
• Configuring, Maintaining of NAS and SAN/ HPE storage.
• Coordinate with various vendors (SUN, IBM, Oracle) to resolve issues.
• Utilizing strong analytical, diagnostics, and performed troubleshooting skills to consistently deliver productive solutions.

Environment: Red Hat Linux (RHEL 5/6/7), Red Hat Satellite Server, Oracle RAC, Veritas Cluster Server, NAS, Active Directory, NIS, Apache, RAC, AWS, Infrastructure Management, VMware, RPM, HPSM, LVM, Web sphere.

Confidential, NJ

Systems Engineer/Linux Administrator

Responsibilities:

• Installed, configured, and performed OS upgrades for server systems, such as Red Hat enterprise servers (version 5, 6, and 5), CentOS, Microsoft Server 2012 and 2008 etc.
• Developed custom images on Cloud utilizing AWS images and on VMWare ESX utilizing templates.
• Created physical servers utilizing Kickstart PXE Boot and Jumpstart.
• Performed health check of servers after patching, rebooting, and checking all the services of Linux on AWS Cloud and physical servers.
• Provided knowledge of operation and production support with large mission critical systems in multiple technologies and platforms, such as WebLogic, Apache JBoss, WebSphere, UNIX, Windows NT, and Oracle.
• Implemented experience with installation and configuration of Kubernetes, clustering them, and managing local deployments.
• Performs troubleshooting bottlenecks of memory, CPU, devices, and network utilizing ps, vmstat, iostat, netstat, sar, snoop, nfsstat commands, and tuning the performance.
• Provides package management utilizing RPM, YUM, and UP2DATE in Red Hat Linux.
• Collaborated with DBAs for installation of Oracle database on Linux servers and for tuning, backup, and restore.
• Created and modified application related objects, creates profiles, users, roles, and maintains system security.
• Created logical volumes (LVM) for Linux operating systems.
• Designed solution for various system components utilizing Microsoft Azure.
• Performed operational tasks and activities, such as, monitoring log files, performance tuning, and migration between environments.
• Created inventory, job templates, and schedules jobs utilizing Ansible Tower.
• Provided knowledge of CI/CD.
• Configured the systems for TCP/IP networking with the existing LAN, creating SSH, and SCP.
• Created cronjobs scripts on production servers.
• Provided experience in application deployments and environment configuration utilizing Puppet.
• Responsible for build and deployment automation using VMware ESXi, Docker containers and Ansible.
• Maintained security for the networked environment while allowing users to access all data and software remotely.
• Coordinated users for any server activities, which may involve major changes on software or any hardware related issues.
• Migrated on web applications, such as, Apache, HTTP headers, load balancing, DNS, and DHCP.
• Supported Apache, Apache Tomcat, and generates SSL keys for renewing SSL certs on web servers.
• Monitored and migrated on problem tickets, following up with business and technical teams, and ensures the problem is successfully resolved. Documents the issue, cause, and resolution.
• Provides 24/7 on-call support on a weekly basis.
• Maintains proper documentation of all the activities carried out during the project

Environment: Red Hat Linux (RHEL 5/6/7), Solaris 9, 10, Oracle 10g/11g, Veritas Cluster Server, NAS, Active Directory, NIS, Apache, AWS, VMware, Zones, Remedy, RAC, Send mail, SAN, LVM, Web sphere.

Confidential, TX

Unix/Linux Administrator

Responsibilities:

• Developed long-term UNIX/Linux strategies for the enterprise environment to stay current with technology and provided the required functionality to the organization.
• Installed and configured Red Hat 5/6/7 utilizing Kickstart Server and Solaris 9/10 utilizing Jumpstart.
• Performed hardware, operating system, security, and application updates and patches on systems, as well as, operating system hardening based on industry standards.
• Provided key operational statistic on system usage, disk utilization, downtime, and performance.
• Developed Linux/UNIX Shell scripts to accomplish redundant tasks to simplify in distributed administration.
• Installed, configured, and administered NagiOS monitoring server.
• Implemented v2v and p2v conversion utilizing VMware converter.
• Created Ansible playbooks for easy deployment and configuration of Linux systems.
• Performed day-to-day Linux administration, such as, user accounts, logon scripts, directory services, file system shares, and permissions.
• Provided customer assistance utilizing Active directory services and remote access tools.
• Created NFS, Samba, and FTP file sharing creation on Linux and Windows servers.
• Maintained VMware ESX servers utilizing VMware Virtual Center.
• Performed post build activities, such as, creating backup interface, NIC bonding, loading additional packages, and joining the server to Active Directory etc.
• Deployed Puppet, Puppet dashboard, and Puppet DB for configuration management to existing infrastructure.
• Migrated with EMC SAN to acquire storage and created Veritas/LVM file systems.
• Deployed and managed AWS cloud formation on EC2 instances and maintained Amazon S3 storage
• Automated build and monitoring tasks across AWS and Rack space utilizing a variety of tools, such as, Mongo DB, NginX, Jenkins, and JIRA.
• Collaborated with Oracle DBA’s for restore of Oracle instance and created Oracle RAC cluster.
• Coordinated with Enterprise security manager to acquire certification for servers before moving them into production.
• Provided Failover, Pre-Failback, Failback, and verification of the same in case of outage in the high environment utilizing VCS (Veritas Cluster Server).
• Developed Cron jobs and Shell scripts (Perl and Python) for automating administration tasks, such as file system management, process management, and server reboots etc.
• Worked with vendors (IBM, HP, Sun, and EMC) in resolving any hardware, storage and network issues.
• Monitored the system performance and performed kernel tuning to enhance the system performance.
• Provided 24/7 on-call support weekly.

Environment: RHEL 5/6/7, Red Hat Satellite Server, VMwareESXi, AWS, Infrastructure Management, Oracle RAC, VeritasNetbackup, Apache, LDAP, Solarwinds, VAS/QAS.

Confidential, CT

Linux Administrator/Infrastructure Engineer

Responsibilities:

• Installed, configured, and performed OS upgrades of server systems, such as, Red Hat enterprise servers (version 5, 6, and 7), CentOS, Microsoft Server 2012 and 2008, etc.
• Performed standard system administration tasks, such as patching, software, and hardware upgrades, directory services, troubleshooting, and problem resolution.
• Enforced the Data Center server standards, policies, and procedures, created and maintained user accounts to manage access control.
• Monitored all servers associated with Cigna’s environment.
• Deployed and supported OpenStack Cloud based on RHEL/CentOS.
• Utilized Puppet and Chef for OS configuration and automation.
• Installed and configured various services, such as, DNS, DHCP, NFS, Send mail, Apache Web Server, NIS, Samba, SSH, Telnet, Yum, RPM package management.
• Configured LDAP clients on server test and performed troubleshooting for maintaining network and data security.
• Created RAC clusters and monitored new Oracle database.
• Monitored regular load of application server and provided operational support.
• Managed Linux containers utilizing Docker and Docker registry.
• Scheduled Cron jobs for disk utilization CPU utilization, backing up and restoring of file systems, backup schedules, system administration, and maintenance tasks utilizing Shell scripts.
• Provided knowledge of Active Directory databases, such as, Microsoft Active Directory domain services.
• Deployed security update and patches to the Linux platform to run more stable and secure infrastructure.
• Performed performance monitoring and tuning of servers utilizing system tools, such as, top, ps, prstat, netstat, lsof, vmstat, and sar.
• Provided key operational statistics on system usage, disk utilization downtime, and performance.
• Worked with EMC SAN to acquire storage and created Veritas and LVM file systems.
• Backup and system recovery using TSM and VERITAS NetBackup.
• Supported Dev, QA, and production on daily basis and ITIL practices, such as, change management, incident management, problem management, and release management.
• Resolved server down and kernel panic issues.
• Performed health checks of servers and generated reports for critical servers.
• Installed and configured VMware infrastructure, such as, vCenter, and ESXi.
• Provided 24/7 on-call support. Provided guidance on best practices for server configuration, patching, and system management.
• Provided experience in new server builds and monitored them based on customer requirement and server decommissioning.
• Removed the instances, which power off-state by taking confirmation from server owner.
• Created and maintained documentation on Linux server builds, policies, and procedures to ensure they were accurate and current.

Environment: Red Hat Linux (RHEL 5/6/7), Red Hat Satellite Server, Oracle RAC, Veritas Cluster Server, NAS, Active Directory, NIS, Apache, RAC, AWS, Infrastructure Management, VERITAS NetBackup, VMware, RPM, HPSM, LVM, Web sphere.

Confidential, MI

Linux Systems Administrator

Responsibilities:

• Installed, configured, and administered Red Hat Linux servers and support for servers.
• Installed, maintained, and provided regular updates of Red Hat Linux servers utilizing Kickstart based network installation.
• Provided 24/7 system administration support for Red Hat Linux 4.x, and 5.x servers to resolve trouble tickets on shift rotation basis.
• Deployed Puppet, Puppet dashboard, and Puppet DB for configuration management to existing infrastructure.
• Performed daily system monitoring, verified the integrity, and availability of all hardware and server resources to review system and application logs.
• Deployed and managed AWS Cloud formation on EC2 instances and maintained S3 storage.
• Performed post build activities, such as creating backup interface, NIC bonding, loading additional packages, and joining the server to Active Directory etc.
• Automated private Cloud launch process, such as, network configuration.
• Developed backup and recovery strategy for applications and database on virtualization platform.
• Supported tuning and optimization of network performance through utilization of virtualization and tools.
• Provided support of creating the server, patching, user administration tasks, deployment, software installation, performance tuning, troubleshooting, and KVM.
• Performed troubleshooting backup and restore problems and created LVMs on SAN utilizing Linux utilities.
• Installed patches and other software packages.
• Handled and generated tickets via the BMC Remedy ticketing tool.
• Monitored all Red Hat Linux based hardware and software and assisted in problem resolution based on alerts and system generated errors in production and development environment.
• Installed Oracle patches and performed troubleshooting, creating, and modifying application related objects to create profiles, users, roles, and maintained system security.
• Utilized Cloud providers and API’s for Amazon (AWS) with Cloud sigma (EU0).
• Created bash and Shell scripts for acquiring information about various Linux servers.
• Monitored overall system performance, performed user management, system updates, and disk and storage management.
• Created technical documentation for various projects and migrated with technical writer to finalize the documents.

Environment: Red Hat Linux (RHEL 4/5/6), Solaris 9, 10, Oracle 10g/11g, Veritas Cluster Server, NAS, Active Directory, NIS, Apache, AWS, VMware, Zones, BMC Remedy, RAC, Send mail, SAN, LVM, Web sphere.

Confidential

Systems Administrator

Responsibilities:

• Installed Red Hat Linux based servers in development, test, and production environments.
• Performed standard system administration tasks, such as, patching, software and hardware upgrades, troubleshooting, and problem resolution.
• Created and maintained Domain Name System (DNS) servers.
• Worked on configuration management and automation software, such as Puppet and Chef.
• Managed monitored solution utilizing Nagios environment.
• Updated the system utilizing Red Hat Enterprise Network (RHN) to manage and monitor through RHN.
• Installed and configured various services, such as, DNS, DHCP, NFS, Send mail, Apache Web Server, NIS, Samba, SSH, Telnet, http, RPM Package Management, Yum.
• Configured monitoring rules for the server environment utilizing Zabbix.
• Performed disk and file system management through Logical Volume Manager (LVM) on Linux and Solaris Volume Manager (SVM) on Solaris.
• Created network environments utilizing TCP/IP, NIS NFS, DNS, SNMP agents, DHCP, and Proxy.
• Developed Linux/UNIX Shell scripts to accomplish redundant tasks to simply in distributed administration.
• Created users with root’s privileges and users with limited root’s privileges that were called sudo users.
• Devised strategies for Disaster Recovery Management (DR), such as, planning and designing servers for back up, recovery, and archival of server and database information.
• Managed configuration and connectivity of customer virtual networks through VMware tools.
• Performed functions, such as, support, performance analysis, troubleshooting, and capacity planning.
• Developed automated scripts, system monitoring tools, and testing tools utilizing Shell and Perl scripting.
• Prepared specs for new infrastructure and VMware servers, disk storage, network switches, routers, firewalls, and VPN’s.
• Performed system monitoring, upgrades, performance tuning, backup, and recovery.
• Provided advanced level of experience in researching OS issues, applying patches, and opening the vendor tickets, such as, Remedy and Redbox.
• Performed day-to-day Linux administration, such as, user accounts, logon scripts, directory services, file system shares, and permissions etc.
• Created NFS, Samba, and FTP file sharing creation on Linux and Windows servers.
• Maintained VMware ESX servers utilizing VMware Virtual Center.
• Supported web development and database teams for day-to-day operations.

Environment: RHEL 5/6, RedHat Satellite Server, RHN, Logical Volume Manager, Global File System, VMwareESXi, Sun & Veritas Cluster Server, KVM, Routers, Oracle RAC, Remedy, RedHat Cluster Servers.