SUMMARY:

• Result Oriented Linux/Unix System Administrator with 10+ years of experience in System Administration Red Hat Linux Enterprise EL 4.x, 5.x, 6.x, 7.x Centos Linux 4.x, 5.x, Microsoft Windows Servers/XP, Sun Solaris, Suse 11.x, 12.x, VMware Vsphere ESX/ESXi environment.
• RHCE: RedHat Certified Engineer(RHEL 5)(Certification No: 805007759129276 )
• CCAH: CCA - 500 Cloudera Certified Administrator for Apache Hadoop (CCAH) (License: 593)
• 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.
• Strong experience in Backup, Job Scheduling, Disk Management, Logical Volume Management (LVM), Logical Partitioning and troubleshooting network problems.
• Experience working in AWS cloud environment like EC2 & EBS and involved in supporting AWS VPC.
• Experience on Installation and configuration Hadoop cluster and its ecosystem components.
• Experience on Installation of VMware ESX, ESXI migration of vm's from one host to another host and also from one data storage to another data storage, Patch management.
• Working knowledge on Automatic Storage Management (ASM) and experience in Shell scripting (Ksh/Csh/bash/Sed/Awk)
• Helped to establish standards, policies and procedures for all aspects of UNIX server environment (e.g., configuration, administration, documentation, etc.)
• Experience in Server builds using Jumpstart and kickstart.
• Proficient DB administration (Oracle, DB2, Mongo, MySql, Sybase and SQL) knowledge for maintaining, pruning, and performing required DB tasks.
• Provided production support in an on-call rotation in a 24x7 environment.
• Extensive experience in installation, configuration, maintenance, design, development, implementation, and support on Suse Linux 10/11/12 and Linux RHEL 5/6/7 Environments.
• Expertise in understanding of error logging subsystem, resolving technical issues by Diagnosing, Problem determination, Troubleshooting and providing Root Cause Analysis.
• Experience in Virtualizations VMware ESX 3.5, 4.0, 4.1, 5.0 and Red Hat KVM, hypervisor.
• Installed, Supported Application and middleware WebSphere Application Server, IBM HTTP/ Apache Web Servers in AIX and LINUX environment for various projects.
• Knowledge and experience in supporting different databases like DB2, Oracle on AIX and LINUX.
• Experience with LVM, User & System Resource Management, Job Scheduling and Paging Space Management.
• Experience in Shell scripting to automate system administration jobs as per the customer requests.
• Experienced in monitoring system performance and check the status of the system using utilities such as SAR, TOPAS, VMSTAT, IOSTAT, NETSTAT etc.
• Expertise in implementation and designing of disaster backup and recovery plan.
• Experience in installing, configuring, supporting and troubleshooting Unix/Linux Networking services and protocols like NIS, NIS+, OSPF, LDAP, DNS, NFS, DHCP, NAS, FTP, SSH and SAMBA.
• Experienced in working with SAN team, Network team, Performance team, Capacity team, Application team and Database team to resolve issues and provide excellent Customer Satisfaction.
• Can configure any open source application on Linux / Unix
• Excellent analytical, oral, written, communication and problem solving skills and good Team Player.

TECHNICAL SKILLS:

Operating Systems: Sun Solaris 8/9/10, Linux (RedHat 3/4/5/6, Suse 9/10, 11), IBM AIX 6.1 5.3, 5.2, 5.1, HP-UX 11.0, Windows NT 4.0, Windows Vista/XP/2000/98.

Hardware: HP PROLIANT DL360, DL360 G3, DL 385; SUN 420R, SUN BLADE 1000, 1500; SUN E250/RACK, E450, E450R, DELL 4500, 6650; DELL POWEREDGE 4400, 6300, 6400, 6850, 750; DELL PRECISION 420 TWR, 530, HP J6700 RACK SYSTEM, SUNFIRE 280r, 4800, V210, V440, V480

Software: VERITAS File System, Veritas storage foundation suite, Solaris Volume Manager, Veritas NetBackup, MS Office Suite, VMware

Languages/Scripting: C, SQL, PL/SQL, Shell Programming, HTML.

Networking: NIS, NFS, DNS, ALE, DHCP, Telnet, TCP/IP, SMTP, FTP, TFTP, UDP, SSH

Backup: tar, cpio, tape backup, MsBackup, Ufsdump, UfsrestoreDatabases:MS Access, Oracle 9i, 10g, 11g, MySQL.

Application Servers and Web Servers: LDAP Server, JBoss, Apache Tomcat 6.x, and IIS 3.0/4.0

Disk Arrays: Sun StorEdge 3130, 6320, 6120, A1000/D1000, EMC DMX 800 and 1000

Mail: SMTP, POP, IMAP, SENDMAIL.

PROFESSIONAL EXPERIENCE:

Sr. Linux Administrator

Confidential, Allen, TX

Responsibilities:

• Installation, Configuration, and OS upgrades on RHEL 5.X/6.X/7.X, SUSE 11.X, 12.X.
• Implemented and administered VMware ESX 4.x 5.x and 6 for running the Windows, Centos, SUSE and Red Hat Linux Servers on development and test servers.
• Installation, configuration and monitoring of monitoring tools like Nagios, HP SiteScope and Cacti.
• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.
• Installation and configuration of atlassian products (jira, confluence, crowd and Bamboo)
• Configuring, Managing and Scheduling CRONTABs for App Accounts and Backup management on a regular basis.
• Installation and configuration of Subversion (SVN).
• Installed and Configured Hadoop Single and Multi node cluster
• Configuration Hadoop ecosystem components like Pig, Sqoop, Hive, HBase, Sqoop and Oozie
• Installed and configured multi-nodes fully distributed Hadoop cluster
• Capable of processing large sets of structured, semi-structured and unstructured data and supporting systems application architecture.
• Providing hardware architectural guidance, planning and estimating cluster capacity.
• Involved in Hadoop Cluster environment administration that includes adding and removing cluster nodes, cluster capacity planning, performance tuning, cluster Monitoring, Troubleshooting.
• Adding new nodes to an existing cluster, recovering from a Name Node failure.
• Decommissioning and commissioning the Node on running cluster.
• Installation of various Hadoop Ecosystems and Hadoop Daemons.
• Recovering from node failures and troubleshooting common Hadoop cluster issues.
• Scripting Hadoop package installation and configuration to support fully-automated deployments.
• Creating volume groups, Logical volumes and extending them using LVM.
• Installed and managed VMware ESX 4.5 hosts running RHEL 5, 6 versions.
• Administered VSphere and deployed several VMS based on the capacity consumption by the Host Groups.
• Worked with the VMWARE team and ensured all the VMs are working without any performance issues.
• Installation, configuration and trouble shooting of Teradata DataBase.
• Installed and configured Splunk for all kind of Application, System logging so that various support team can get information online instead of combing the log files.
• Installed and configured Apache Web Server.
• Developed scripts for automating administration tasks like customizing user environment, and performance monitoring and tuning with nfsstat, netstat, iostat, and vmstat.
• Created Bash shell scripts to monitor system resources and system maintenance and performed administrative tasks such as System startup/shutdown and Backup strategy.
• Managed the User and Application Account creations, deletions, and setting up sudo access for DBA and application account access.
• Experience with running SQL queries on Oracle and MySQL.
• Administered security, users, group administration and daily backup and restore operations, networking service, performance and resource monitoring and Performed disaster recovery management procedures.
• Administration responsibilities include user, group, disk, and security management.
• Involved in preparation of functional and system specifications. Estimated storage requirements for applications.
• Worked with DBA team for database performance issues, network related issues and with vendors for hardware related issues.
• Worked with DBAs on installation of RDBMS database, restoration and log generation.
• Configuring and troubleshooting LAN and TCP/IP issues.
• Managed shared NFS, mounting and un mounting NFS server, NFS client on remote machine, sharing remote file folder, starting and stopping the NFS services.
• RPM and YUM package installations, patch and other server management.
• Creating new file systems, monitoring disk usage, checking and backup of log files administration and monitoring the disk based file system.
• Troubleshooting hardware and replacement of failed components running on LINUX and SOLARIS environment, Performance tuning activities like allocation and monitoring of disk space using Disk Quota system.
• Configuration of Hardware and Software RAID. Disk replacement and File system recovery.

Environment: Red Hat Linux 5/6, SUSE 10/11, VMware ESXi 5.x, Samba, Nagios

Sr. Linux Administrator

Confidential, Chattanooga, TN

Responsibilities:

• Administration of RHEL 5/6 that includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Creating, cloning Linux virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
• Installing Red Hat Linux using Kickstart and applying security policies for hardening the server based on the company policies.
• Data center Infrastructure upgrades, Application migration to new servers.
• Experience in Developing KORN, BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Installed and Configured JBOSS on Java Applications
• Administration, package installation, configuration of CentOS 5.
• Setup NFS Servers, Diskless clients and Auto clients and automated the file systems using direct and indirect maps. Also setup entries in /etc/exports and mounted the disks onto the client systems by adding entries to /etc. / FSTAB.
• Installing MySQL on Linux Server and securing installation.
• RPM and YUM package installations, patch and other server management.
• Creating new file systems, monitoring disk usage, checking and backup of log files administration and monitoring the disk based file system.
• Configuring multipath, adding SAN and creating physical volumes, volume groups and logical volumes.
• Installing and configuring Apache and supporting them on Linux production servers.
• Kernel compilation and patch up gradation on Linux servers.
• Installed and configured Oracle 10g/11g RAC high availability.
• Administration and setting up Oracle RAC on RHEL 5.x servers.
• Familiar in LDAP setup and administration.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as iptables, firewall, and TCP wrappers and NMAP.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems using shell scripting and CRONTABs.
• Creating and Managing Users / Group accounts and setup a user's work environment.
• Monitoring the File System, CPU load for better Performance and system performance parameters using iostat, vmstat and prstat.
• Monitoring system performance, tune-up kernel parameter, adding/ removing/ administering hosts, users, disks on DNS / NIS domain.
• Performed the configuration and administration of DNS, NFS, SAN, NIS and database files.
• Worked on making DNS entries to establish connection from server to DB2 database.
• Performed OS upgrades and Patch loading as and when required.
• Backing up and restoring files across the network.
• Installation of Apache, Weblogic and Tomcat Web servers.
• Creating SSL certificates for windows servers and Solaris/Linux Servers.
• Creating VM snapshots for test and deployment as well as in production change controlled release environment.
• Administered VSphere and deployed several VMS based on the capacity consumption by the Host Groups.
• Worked with the VMWARE team and ensured all the VMs are working without any performance issues.
• Installing and Managing Virtual Center 5.5.
• Test and install various patches (Fix Packs) on the servers to solve the problems encountered by the applications running on the servers.
• Configuration of Hardware and Software RAID. Disk replacement and File system recovery.
• Reducing the downtime/resolution time by pinpointing the errors and coordinating with development team and third party software providers
• Attend team meetings, change control meetings to update installation progress and upcoming changes in environment.

Environment: RHEL 5/6, Solaris 9/10, Apache 1.2/1.3/2.x, Oracle 11g/10g/9i, VM ESX 4.x /3.x.

Linux Administrator

Confidential, Erie, PA

Responsibilities:

• Administration of RHEL 5/6 that includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Creating, cloning Linux virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
• Working in AWS Cloud Environment like EC2 & EBS.
• Installing Red Hat Linux using Kickstart and applying security policies for hardening the server based on the company policies.
• Experience in Developing KORN, BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Installed and Configured JBOSS on Java Applications
• Administration, package installation, configuration of CentOS 5/6.
• Installing MySQL on Linux Server and securing installation.
• RPM and YUM package installations, patch and other server management.
• Creating new file systems, monitoring disk usage, checking and backup of log files administration and monitoring the disk based file system.
• Installing and configuring Apache and supporting them on Linux production servers.
• Kernel compilation and patch up gradation on Linux servers.
• Installed and configured Oracle 10g/11g RAC high availability.
• Administration and setting up Oracle RAC on RHEL 5.x servers.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as iptables, firewall, and TCP wrappers and NMAP.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems using shell scripting and CRONTABs.
• Creating and Managing Users / Group accounts and setup a user's work environment.
• Monitoring the File System, CPU load for better Performance and system performance parameters using iostat, vmstat and prstat.
• Monitoring system performance, tune-up kernel parameter, adding/ removing/ administering hosts, users, disks on DNS / NIS domain.
• Performed OS upgrades and Patch loading as and when required.
• Backing up and restoring files across the network.
• Creating VM snapshots for test and deployment as well as in production change controlled release environment.
• Installing and Managing Virtual Center 5.5.
• Closely worked with development and QA teams.

Unix/Linux Systems Administrator

Confidential, Atlanta, GA

Responsibilities:

• Installation, configuration and Operating System upgrade on, Red Hat Linux and Sun Solaris.
• Performed automated installations of Operating System using kick start for Red Hat Enterprise Linux 5/6 and Jumpstart for Solaris 9/10 Linux.
• 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.
• Experience in VMWARE ESXi 4/5 and vSphere and managed VM resource upgrades, Cold migration of VM from once vCenter to other.
• Handled and documented Cold Migration issues and IP, SAN, Network bandwidth and VLAN constraints.
• Performance Management & Tuning of RHEL.
• Responsible for multicasting of various components as a system administrator.
• Monitoring system resources, logs, disk usage, scheduling backups and restore
• Set up Quotas for the user accounts & limiting the disk space usage.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Upgrading RHEL 5.0 to RHEL 5.5 using live upgrade and manual upgrade.
• Installed and Configured Web logic 8.x, 9.x on Java Applications.
• Extensive use of LVM, creating Volume Groups, Logical volumes, and disk mirroring.
• Performance Management & Tuning of AIX 5.2/5.3 UNIX Kernel.
• Hands on experience on various cloud computing products such as Amazon Web Services EC2 and VPC.
• Removing Virtual Resource from the VIO Server and Decommissioning the VIO Client LPARS.
• Perform User Account management, data backups, and users’ logon support.
• Develop Shell scripts (Korn) for automating the batch jobs.
• Responsible for the upgrades to AIX and software packages and maintained them in accordance with established policies, procedures and service level agreements.
• Installed and Configure DNS, Websphere, DB2 Database and Tivoli storage manager.
• Work with DBAs on installation of DB2, restoration and performance tuning.
• Patched different software using RedHat Package Manager and YUM.
• Attend team meetings, change control meetings to update installation progress and upcoming changes in environment.

Unix/Linux Administrator

Confidential, Portland, ME

Responsibilities:

• Linux administrators, responsible for providing for 24x7 support for production and responding to users’ tickets from remedy.
• Administered Network File Systems using Auto mounter and administering user and OS data files in NIS and NFS environment on both Redhat Linux and Solaris environments
• Log management like monitoring and cleaning the old log files.
• Configuration and administration of DNS, LDAP, NFS, NIS, NIS+ and Sendmail on RedHat Linux.
• System audit report like no. of logins, success & failures, running cron jobs.
• Administered VSphere and deployed several VMS based on the capacity consumption by the Host Groups.
• Worked with the VMWARE team and ensured all the VMs are working without any performance issues.
• Installing, configuring and Maintenance and Systems Development of AIX 4.3/5.1/5.2/5.3 servers.
• Day-to-Day trouble shooting for the end users on RHEL 4/5, Suse9, 10 based applications.
• Extensive use of LVM, creating Volume Groups, Logical volumes, and disk mirroring, fixed the Problem of Stale and partially mirrored Logical volumes.
• Perform User Account management, data backups, and user’s logon support.
• Worked on Projects of South Server help Issues and Pathmark Service requests. Resolving the path mark user requests and South server help ISSUES.
• SWAP box configuration, Implementation of disaster backup and recovery.
• Managed Patching and worked on Firmware Updates for Blades and Enclosures.
• Ability to write Perl and Shell scripting.
• Monitor system capacity and performance using standard tools such as topas, sar, vmstat, iostat, etc.
• Work with performance and DBAs on installation of DB2, restoration and performance issues.
• Attend team meetings, change control meetings to update installation progress and upcoming changes in environment.
• Provide 24x7 supports on call support on shift rotation basis.

Linux Administrator

Confidential

Responsibilities:

• Installation, configuration and Operating System upgrade on, Red Hat Linux and Sun Solaris.
• Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center
• Experience in VMWARE ESXi 4 and vSphere and managed VM resource upgrades.
• Performance Management & Tuning of RHEL.
• Responsible for multicasting of various components as a system administrator.
• Monitoring system resources, logs, disk usage, scheduling backups and restore
• Set up Quotas for the user accounts & limiting the disk space usage.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Perform User Account management, data backups, and users’ logon support.
• Develop Shell scripts (bash) for automating the batch jobs.
• Work with DBAs on installation of Oracle, restoration and performance tuning.
• Log management like monitoring and cleaning the old log files.
• System audit report like no. of logins, success & failures, running cron jobs.
• Set up development environment for developers.
• Configuring Windows Active directory service and designing standard folder architecture for the users.
• Developed and customized scripts that resulted in improved systems monitoring.
• Install and Configure the Server as per the requirement.
• Configure and maintain Linux Proxy server, which clean accessing limits.
• Configure and maintain CISCO 2600 with ISP coordination.
• Specialized in Remote administration.
• Telephonic Supporting remote users.
• Specialized in LOAP (Linux, Oracle, Apache and PHP).
• Weekly and monthly system maintenance report of all the LAN.
• Completed RHCE certification.