SUMMARY

• Over 6+ years of IT industry experience as a System Administrator under environment of Red Hat Enterprise Linux 3.x/4.x/5.x/6.x, Cent OS 4.x/5.x, Solaris 9, 10, Oracle Enterprise Linux 5.x, and Vmware ESX environment.
• Experienced in Installs, Upgrades, Patches, Configuration, performance tuning on UNIX and system software & hardware.
• Expert in configuration, Implementation, Administration and Troubleshooting skills with network protocols of DHCP, DNS, TCP/IP, SMTP AND SNMP SERVERS.
• Knowledge of Big data and Hadoop ecosystem and its components like HDFS, Hive, Pig, Scoop and Hbase.
• Implemented and architected Open Source web content and URL filtering mechanism.
• Expertise in file system management in creating and managing Logical Volume Manager (LVM), ZFS, of Apache/Tomcat/lightpd/ngnix and Monitor Disk space in Red hat Linux.
• Experience in Install and configuration of Web hosting administration HTTP, FTP, SSH, & RSH
• Experience in SQL, MySQL, Oracle and MariaDB.
• Hands on Experience with JENKINS.
• Experience in Installation and configuration of VMware workstation and VMware ESX / ESXi server and creation of VMs and install different guest OS.
• Experienced in configuration of NFS, FTP, SAMBA, SFTP SERVERS to share file systems.
• Creating, cloning Linux Virtual Machines, templates using VMware workstation and ESXi environments
• Experience in Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• Resolving system errors and crashes, huge file sizes, file system full errors.
• Experience in Package management using RPM, YUM and UP2DATE in Red Hat Linux.
• Ability to write Shell&Perl scripting.
• Installation of Database servers and user’s management such as Oracle, SQL Server.
• Capable of quickly learning and delivering solutions as an individual and as part of a team.
• Considerable knowledge in DevOps tools(Puppet/Chef/Jenkins/Git/Jira/HipChat)
• Installation, administration, maintenance and support of Jenkins
• Knowledge on web accelerations technologies like memcached, Varnish.
• Experienced in providing File level security or firewall through SELINUX.
• Experience in Disaster Recovery and Business Continuity Planning in case of eventualities.
• Ability to perform firmware and operating system patching.
• Coordinated with SAN Team for storage allocation and Disk Dynamic Multi - pathing (DMP).
• Administration of F5 Load balancer, Creation of Virtual servers, VIP’s, Pools and Pool member’s creation, health monitoring of VIP’s, traffic analysis.

TECHNICAL SKILLS

Operating Systems: RHEL 5.0/6.0/7.0, Solaris 9/10, Centos 5.0/6.0, VMware ESX/ESXi 4.x & 5.x, OEL 5/6, Windows XP/2003/2007.

Networking: TCP/IP, NIS, NFS, FTP, DNS, DHCP, Samba, Apache, SMTP, SSH, IP-Tables

Backup/Monitoring Tools: TOP, SAR, tcpdump, Wire shark, Send Mail, Postfix, Nagios, Cacti.

Programming,Scripting Language & Databases: MySql,Oracle, Shell Scripting and Perl Scripting.

Automation Tools: Chef and puppet

Cluster: VERITAS Cluster Server, RHN satellite cluster.

Web/Application Server: Apache, Tomcat, JBoss, WebLogic, Jetty, iPlanet, WebSphere MQ, portal servers, IBM HTTP Server, IBM Glassfish, Microsoft IIS.

Protocols: TCP/IP, UDP RIP, OSPF, BGP, SNMP, SMTP, TELNET, RPC

Database: Oracle, PostgreSQL, RAC, MySQL, SQL SERVER 2007.

Hardware: Dell-2950, HP Proliant, HP-460C Blade, IBM F-series P-series RS6000,SUN M5000 & T2000 servers with SUN ZFS.

Virtualization: VMware, XEN, KVM, Vsphere client.

Security: SELINUX,IP tables,PAM

PROFESSIONAL EXPERIENCE

Confidential, Portland,OR

SR.Linux Admin

Responsibilities:

• System Administrator with networking background. Experience in Designing, Building and supporting Red Hat 4,5,6,7 on Systems HP DL380 and DELL Power Edge R720, Cisco UCS Manager 2.2(3d) environment and IBM AIX 5.3, 6.1 & 7.1 on Power 5, Power6, Power7 & Power8
• Advanced enterprise level DNS and DHCP technical troubleshooting skills.
• Worked on SELINUX and switching between various modes such as enforcing, permissive and disabled on Apache httpd web servers
• Advanced server protocols and utilities (DNS, SMTP, S/FTP, TCP/IP UDP, SSH, Samba)
• Experience setting up and deploying systems with Red Hat Satellite.
• Enterprise technologies (NFS, Kick start, performance tuning, security)
• Managing Linux Infrastructure involving day-to-day maintenance of servers and troubleshooting.
• Provisioning Red Hat Enterprise Linux Server using PXE Boot according to requirements.
• Implemented patch management using Redhat Satellite server.
• Working with Logical Volume Manager and creating of volume groups/logical and performed Red Hat Linux Kernel Tuning.
• Network installation server through automation tools Cobbler, install and deployment operating system, and package management.
• Created servers in different environment in datacenter and automated that server by using chef.
• Automating infrastructure in AWS with Chef.
• Installation, configuration and deployment of LAMP servers
• Installation, configuration and maintenance of Git hub.
• Expertise in security hardening (iptables/selinux) major Production Servers, and compiling, building and installing web server based Linux tools.
• Experience deploying and operating RHEL systems on VMware vSphere 5.0.
• Local and Remote administering of servers, routers and networks using Telnet and SSH.
• Experienced with complex networking infrastructure including VLANs, and load balancers.
• Experienced in architecting and administering Linux servers, scheduling systems, and high-performance storage and networking systems.
• Distribution administrative tasks, RPM and YUM repository.
• Expertise in configuring Red Hat Cluster Nodes for any legacy applications and verified the daily health check on the Cluster Nodes utilizing clusters.
• Expertise in creating VM Templates, cloning and managing Snapshots.
• Expertise in working with MySQL databases, Apache Web server, Tomcat Application Servers
• Troubleshooting any performance or configuration issues with MySQL and Oracle.
• Expertise in hardening, Linux Server and Compiling, Building and installing Apache Server from sources with minimum modules.
• Maintenance of DNS (Bind) zones,adding, removing of DNS Records, ensure replication.
• Installation and configuration of Zabbix monitoring system.
• Monitoring and troubleshoot backups and schedule Cron jobs.
• Experience in scripting using BASH & PERL, Samba Server, Apache Server.
• Patch management of servers and maintaining server’s environment in development / QA / Staging /Production.
• Installation and configuration and setup of docker container environment.
• Resolving assigned tickets in Development/QA/Staging/Production.

Environment: RHEL 4.x/5.x/6.x/7.x, Centos, Solaris, VERITAS Volume Manager 3.x/ 4.x, VERITAS Storage Foundation 5, VMWare ESXi 5.1, NFS, DNS, SAN/NAS.

Confidential, San Diego, CA

Sr.Linux Admin

Responsibilities:

• Installation, configuration and upgrade of Redhat Linux 5/6, Redhat Satellite 6.1, Cent OS 5.7, Windows 2003, windows 7, windows 8.1,windows 10 & Solaris 11 operating systems. Extensive experience with Domain Name systems, Active Directory, Windows Internet Naming Service and Microsoft Exchange.
• Directed the implementation and performance tuning of Windows 2003 Server environment for client’s global operations. Delivered a major improvement over old VPN system that catapulted productivity of remote sales force.
• Involved in developing custom images on Cloud using AWS images and on VMWare ESX using templates and involved in building physical servers using Kickstart PXE Boot and Jumpstart .
• Involved in health check of servers after patching/rebooting and checked all the services of Linux on AWS Cloud and also physical servers.
• Experience in BEA Weblogic Application server 7.x/8.x/9.x/10.x administration under heterogeneous environments like UNIX, RHEL, SUN Solaris 8.0, 9.0, 10.0, IBM AIX and Windows NT.
• Monitoring of Linux, Solaris servers using tools like vmstat, iostat, SAR, top, free etc.
• Configuring, administering and troubleshooting of NFS.
• Setup user and group login ID's, password and network configuration.
• Extensive knowledge Server administration, Kernel upgrade, patch install.
• Maintaining Authoritative DNS server and allow to automate records from our customers.
• Network troubleshooting using 'netstat','ifconfig' and Worked closely with vendors on Hardware Problems, software fixes.
• Configuration of LVM (Logical Volume Manager) to manage volume group, logical and physical partitions and importing new physical volumes.
• Applying all firewall and security policies with emphasis on maintaining best practices.
• Strong experience in VM environments (Xen and VM Ware).
• Worked with OSS team to automate email cleanup and other tasks that could be automated.
• Created and managed FTP web interface to send files to customer FTP site using PHP.
• Created Bash scripts to monitor processes and making sure process startup when operating system restarts using chkconfig and RC startup levels.
• Troubleshooting OS and user problems on various Servers and on different platforms.
• Developed bash Shell scripts to automate routine activities.
• Coordinating with vendors to solve the hardware and software related issues.
• Implemented Security by disabling unused services and using IPtables and TCP wrappers
• Creating new file system, mount file system, monitoring free space, disk usage, locating files and checking & clearing of log files.
• Administrative tasks such as System Startup/shutdown, Backup strategy, Printing, Documentation, User Management, Security and Network management
• Provide responsive off-hours support in a 24 / 7 environment and ensure maximum availability of all servers and applications
• Installation, configuration of Jenkins for Continual integration.

Environment: RHEL5/6/7, Jenkins,VM Ware, Cron, Oracle, Shell Scripting, NFS, DNS, Email system, Apache, LVM, Perl scripting and oracle.

Confidential, Pittsburgh, PA

Linux Admin

Responsibilities:

• Reviews and manages Unix Operations Team workloads and supports tickets to ensure correct prioritization and progress.
• Lead 3 teams - Monitoring team, System team, Network team , and onsite infrastructure teams (30+ resources).
• Manages incident escalations and coordinates resources appropriately
• Conducts weekly team meetings and attends other meetings as required for RCA .
• Planning, installation, configuration, monitoring, and deployment of Solaris/Linux environments .
• Analyzing and resolving problems with server hardware/software setup, tuning, and troubleshooting all aspects of the Sun Solaris (Solaris 10) and Linux (CentOS /Red Hat)
• Evaluating and applying security patches on Solaris and Linux servers
• Developing scripts to support task automation and monitoring activities
• Installation, configuration and fine tuning LAMP servers on Centos 5
• Installation, configuration of syslog server .
• Supporting and troubleshooting network services and protocols such as TCP/IP, DNS, NFS, FTP, SSH, Kerberos, endmail, and LDAP
• Used Logical Volume Manager for the management of Volumes including creation of physical and logical volumes on Linux
• Use Jump start for OS installation with support of Jump Start server
• Configure local file system according to service requirements
• Configure single/multiple network interface for network connectivity
• Configure network file system for service requirements
• Configure large file system with Solaris ZFS
• Creating and updating detailed How-To and Best Practices guides
• Maintain 2003 / 2008 AD environment and deploy images through SCCM .
• Pull software and hardware inventories through SCCM queries.
• Conducting ongoing security risk assessments, including the monitoring and reporting of security and access violations.
• Maintains current knowledge with respect to relevant state-of-the-art technology and makes recommendation for training.
• Build servers using Kick Start, Red Hat Satellite Server / Spacewalk .
• Establishes and implements policies, procedures, and standards and ensures conformance with information systems and objectives
• Responds within defined SLA metrics to issues logged in the HPSM ticketing system.
• Installation, Configuration and deployment of Apache Hadoop environment for providing POC’s for customers.
• Installed and configured puppet for updating of configuration files in Hadoop environment

Environment: RHEL/CentOS 5/6, Windows 2003/2008 AD &SCCM, Solaris9, F5 Firepass, Juniper IDP100, Veritas Cluster server (VCS), VMware ESXi5.1, CA Arc Backup, CA Unified Asset Portfolio manager

Confidential

Sr.Linux Admin

Responsibilities:

• Installing operating systems Linux, CentOS and Solaris according to business requirements.
• Planning and implementing the configuration changes to the servers adhering with ITIL change management process.
• Trouble shooting the issues ranging from Solaris, Linux and SAN environments.
• Created and Maintained Solaris 10 zones/containers.
• Experience in creation and maintenance of ZFS file systems.
• Regularly applying patches both for Linux / CentOS systems.
• Installed and Configured Kickstart Server.
• Working with VERITAS Volume Manager for creating volumes and file systems for various applicationsand databases.
• Creating and maintenance of Virtual machines in VMware workstation and ESX.
• Worked on different VMware products like VMware workstation, VMWare server 1.2 /2.0 GSX/VMware server, VMware player, VMware Converter and ESX server 3.X.
• Configured, Installed LDAP authentication in Linux server environment.
• ManagedOpsware for network device management and monitoring.
• Involved in SAN migration project to migrate the data across the storage arrays.
• Consolidated physical servers migrating into VM Virtual environment.
• Part of service transition team, during Convergys sold its HR business.
• Implemented security policy and managed firewalls/IDS. Managed DNS, send mail, IP space, andco-location facility transition
• Responsible to handle AD accounts, SCCM single image creation and deployment.
• Providing 24/7 on-call support on rotation basis.
• Developed Bash and Perl scripts to automate routine activities
• Installation and Configuration of Windows Active directory server 2008 and citrix servers. Administration of applications via Citrix MetaFrame.

Confidential

Linux Admin

Responsibilities:

• Install/upgrade packages and patches for Windows,Centos and Red hat Linux Servers.
• Installation and configuration of Dell arrays.
• Migrate Application servers from Red Hat Linux-3.x/4.x to RHEL5. x.
• Prepare documentation for Server Builds.
• Document procedures and processes accurately.
• Deployment of Apache web servers.
• Implementation of LAMP servers.
• Implementation of NTOP to monitor bandwidth usage of users.
• Implemented Open Source URL and Content filtering application with open source tools like Squid.
• Implementation of Virtualization Environment (VMware server 1.2) as a sandbox environment for the server configurations and testing installations.
• Backups on Network using tar, compress, zip and pack utilities.
• Analyze and troubleshoot bottlenecks involving memory, CPU, disk and network devices using ps, vmstat, iostat and SAR commands & further tuning the performance.
• Performing Linux System Administration routines, migration, swap partition and file system changes, system booting and recovery.
• Implemented ISO 27001 controls for CalPERS data migration project form Forte to Java.
• Implemented of Server monitoring withNagios, to monitor server’s health status.
• Create a State of the art trading Server platform (Mixed Environment of Linux, Mac and Windows Servers) for automated trading systems.
• Advanced usage of sniffers for network troubleshooting and optimization.
• End of life - take required steps to decommission old hardware (shredding)