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Linux Administrator Resume

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Houston, TX

SUMMARY:

  • Over 9 years of IT industry experience in System Administration on Red Hat Linux, IBM AIX, SUSE Linux, Sun Solaris Server environments.
  • Expertise in Datacenter Consolidation and pre - consolidation tasks.
  • Performed Installs, Kernel Upgrades, Patches, Configuration, Performance tuning on UNIX and system software & hardware.
  • Experienced in Configuring and Monitoring using NAGIOS, NAGVIS, NDOUTLS, ZENOSS, and MRTG.
  • Hands on experience installing, configuring and deploying Openstack solutions.
  • Linux-based Virtualization implementations such as VM Ware and Xen on Red Hat.
  • Expertise in Installation, Configuration, Implementation, Up gradation, Maintenance & Troubleshooting of application servers and good experience in clustering.
  • Creating and maintaining user accounts, profiles, security, rights, disk space and monitoring.
  • Good experience in Confidential Volume manager (VxVM), creating new file systems, mounting file systems and un mounting file systems.
  • Server Consolidation and Migration of Applications on Oracle and Java Applications.
  • Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using HACMP, Red Hat Cluster Server in SAN environment.
  • Experienced in implementing the workload Management (WLM) using cloning and clustering
  • Expert in installing, configuring and maintaining Apache/Tomcat, Samba & Send mail and Web Sphere Application Servers.
  • Developed UNIX shell scripts using bash, korn& C Shell Scripting, SED and AWK to ease the administration tasks.
  • Hands on experience on major components in hadoop ecosystem including HBase-Hive integration, PIG, Sqoop, Flume, Zookeeper, Oozie, and knowledge Mapper/Reduce/HDFS framework.
  • Hands on experience on Installation and configuration of Cloudera-Hadoop on the Linux Servers also supported the Cloudera upgrades from 4.X to 5.X.
  • Worked Extensively on Control - M on Hadoop servers.
  • Hands on experience with installations and configuration of SQL, MYSQL.
  • Expertise in implementation and maintenance of DHCP, NFS, NIS, DNS and Apache SMTP.

TECHNICAL SKILLS:

Operating Systems: Red Hat Linux 4.x/5.x/6.x/7, SUSE Linux, IBM AIX 4.x5.x, 6.x,, Sun Solaris 9/8/7, Centos 6,7, Ubuntu

Networking: TCP/IP, NIS, NFS, DHCP, DNS, WAN, SMTP, Cisco Routers/Switches, TELNET, FTP/TFTP, SNMP, LDAP

Scripting Languages: Bash, Perl, CSH, KSH, Python, WLST

Web Severs: IBM Http Server, I Planet 6.x/5.x, Apache 2.x/1.x, Tomcat 5.x/4.x/3.x, JBOSS, Tomcat, Web Sphere 5.x/6.x, HTML, JavaScript, XML, EJB, Servlets

Software: Confidential File System, Confidential Volume Manager, Solaris Volume Manager, HP-UX LVM, Confidential Net Backup, Open Stack, Samba, Tivoli (TSM)., Hadoop, Cloudera, Conrol M

PROFESSIONAL EXPERIENCE:

Confidential, Houston, TX

LINUX Administrator

Responsibilities:

  • Expertise in Datacenter Consolidation by migrating physical servers to different locations and converting physical servers to virtual servers.
  • Conducted pre-consolidation tasks, which included Health Checks, validations and data collection of the servers.
  • Handled over 1000 servers as part of datacenter migration.
  • Performed Installations and upgrade of operating systems and software applications on several servers.
  • Performing troubleshooting production issues, root cause analysis and preventive actions.
  • Creating RAW and ASM disks for oracle.
  • Troubleshooting and analysis of hardware and software failures using core dump and log file analysis
  • Worked on Vsphere Data Protection for virtual machine backups and disaster recovery.
  • Configured VMware and installed several Linux and Windows Operating Systems according to the client needs. Also involved in maintenance and Troubleshooting of VMware.
  • Worked on SAN management software and provided SAN administration for Red Hat Linux.
  • Kernel upgrades for Linux and IBM AIX and configured virtual IPs in Linux and AIX.
  • Was part of change management using ITSM application for weekend on call support and go live support.
  • Providing 24/7 on call and weekend support for production and Go Live events.
  • Worked on daily work orders, which included configuration of file systems using LVM and Multipathing.
  • Installed and upgraded packages and patches on RHEL 5.x, 6.2, 6.5 and 7 servers using RPM, YUM and third party software applications.
  • Installation of Database servers and users management such as Oracle, MYSQL, SQL Server.
  • Implementation and maintenance of DHCP, NFS, NIS, DNS Mailing List, Send mail, FTP and Apache SMTP.
  • Application installation and troubleshooting for Solaris, Red Hat Linux and CentOS.
  • Hands on experience in creating initiator groups, Volumes, LUNS for the windows and Unixmachines on the NetApp filer.
  • Installed and configured TIBCO EMS servers on developer’s workstations and UNIX machines.
  • Automate configuration management across environments with Puppet
  • Performed creation and permission changes of files, folders and groups and managed user accounts on several servers as part of day-to-day tasks.
  • Troubleshooting and analysis of hardware and software failures for various Linux servers.
  • Worked on Kernel upgrades and SAN Disks configuration.
  • Utilized the crontabutility to schedule various System admin tasks.
  • Installation and Configuration of VM's in VMware ESXi 4.0,4.1,5.0, 5.1 and troubleshooting of VMware, and ESXi Servers.
  • Installed and configured the prerequisites software for OpenStack on RedHat Linux with python.
  • Installed and upgraded the OpenStack client installation using pip utility.
  • Managed Jira users and created workflows, issues types, fields in production.
  • Installation and configuration of Web /Application Server Apache-Tomcat.
  • Monitoring system performance and kernel tuning to enhance the system performance.

Environment: Linux, RHEL 5.x/6.2/6.5,7, CentOS, YUM, RPM, DHCP, NFS, NIS, DNS, FTP, Apache, SMTP, Cloudera, Hadoop, LVM, SQL, JAVA, Multipathing, VMWare, Puppet, SAN, Apache-Tomcat, Jira, WAS, HBase-Hive

Confidential, Grafton, WI

LINUX Administrator

Responsibilities:

  • Automatic monitoring scripts, performance data Collection, load distribution, Install/Upgrade, hardware maintenance for CentOS, Red Hat Linux and IBM AIX.
  • Server performance monitoring using automated PERL scripts for average load, iowait, memory & swap utilization, irq, softirq, disk and CPU util.
  • Monitoring and reporting of Team’s SLA, SLO and C-SAT scores.
  • Systems monitoring and administration of IBM AIX 5.x/6.x and Red Hat Linux 5.x Servers for day-to-day problems in production environment and solved tickets on shift basis.
  • Creating new file systems and work on extending the file systems and LVM.
  • Installed patches, software up gradation, monitored log files, and performed backup for IBM AIX as well as Linux servers.
  • Installed and configured Control - M
  • Upgraded the existing version of Control - M tolatest version.
  • Upgrading and validation of Agent Installations of Control - M on Linux servers.
  • Installed VMware ESX server on Dell Servers and configured IBM AIX 5.x/6.x, Red Hat Linux 5.x, virtual machines for various applications.
  • Configured Firewalls and security using SSl, ipchains, IPtables, TCP wrappers, tripware and Port scanners.
  • Installed, monitored and supported Web and Application Servers on Solaris and Linux environments.
  • Deployed Puppet, Puppet Dashboard, and Puppet DB for configuration management to existing infrastructure.
  • Installed and configured SQL on many Linux servers.
  • Configured My.cnf files for supporting multiple applications.
  • Identify and Troubleshoot of MySql Logs.
  • Installation & Configuration of Logical Volume Manager - LVM and Confidential Volume Manager.
  • Configuring DNS, DHCP, NIS, NFS and other Network Services in IBM AIX 6.1.
  • Setup of NFS, FTP Servers in IBM AIX, Red Hat Linux and SUSE Linux.
  • Integrating UNIX file systems using packages like SAMBA. Setting up printers on UNIX / NT machines to work seamlessly across platforms.
  • Installation of system imager on system image server and client server.
  • Installation and configuration Confidential Net Backup on AIX Severs and performing Backup-using VNB.
  • Troubleshooting IBM AIX problems, logging call with IBM, Involvement in Racking servers.
  • Kernel upgrades for Linux and IBM AIX and configured virtual IPs in Linux and AIX.
  • Implementation and Management of Disk Quota on Linux and IBM AIX Servers.
  • Performed virtualization using Xen
  • Monitoring system activities, and Performance on IBM AIX, CentOS and Red Hat Linux Servers using third party tool such as Nagios and HP Tivoli Monitoring Tool.
  • Extensively worked with system and provided 24/7 on call and weekend support for production.

Environment: Red Hat Linux, IBM AIX 5.x/6.x, CentOS, Puppet, PEARL Scripts, TCP, VMWare, Unix, DNS, DHCP, NIS, NFS, FTP, VNB, Hadoop, SQL, JAVA.

Confidential, Reston, VA

LINUX Administrator

Responsibilities:

  • Responsible for installation and configuration of RedHat4.x, 5.x and SUSE Linux Enterprise Server (SLES) 10.x, 11.0 on IBM and HP hardware
  • Experienced in deploying, cloning and creating template of virtual machines using VMware
  • Learned and managed systems with the Puppet configuration management tool
  • Built 3 and 4 node Oracle RAC Servers
  • Configured SUDO to provided SUDO access to various users and group for elevated access
  • Installed IBM Systems director client on various servers and maintained the IBM Systems director for Hardware monitoring.
  • Resolving issues as they arise with JIRA and Confluence in coordination with the IT department.
  • Manage Virtual servers on VMwareESXServer3.0/3.5.
  • Installed and configured Tivoli End point client on servers for OS level monitoring
  • Implemented Relax and Recover (ReaR) for disaster recovery.
  • Completed a full migration of UNIX Server (AIX and Linux), including all network services.
  • Worked on tools like Yum, YaST, RPM, Zypper, rug for Package management
  • Deployed latest patches and performed RedHat Linux Kernel Tuning for Oracle
  • Installed LAMP server (RHEL 5.4, Apache 2.2, MySQL 5.0 server and Perl )
  • Used the LVM extensively for Creating/Modifying/Deleting Physical Volume, Volume Groups and Logical Volumes and file systems.
  • Troubleshooting and analysis of hardware and software failures using core dump and log file analysis
  • Responsible for QA of newly built servers.
  • Experience with IBM Power7 Virtualization and XEN Virtualization, VMware. Expertise in migrations (P2P, P2V & V2V).
  • Creating Cron jobs and giving Cron eligibility for administrative accounts
  • Performance Monitoring and Tuning using iostat, vmstat, netstat,sar, ksar, top Provided 24x7 on call support for production environment

Environment: RedHat Linux, Suse Linux Enterprise server, Unix, puppet, VMWare, Oracle, Tivoli, Kernel Tuning, LVM

Confidential, Ashburn, VA

UNIX / LINUX Administrator

Responsibilities:

  • Involved in installation, configuration and Up gradation of Solaris, Linux Operating Systems.
  • Configuring, troubleshooting and maintaining Portal Application.
  • Part of Unix/Linux administrator team performing activities like Change Management and package and patch up gradation every quarterly.
  • Supporting UNIX servers and troubleshooting day to day problem
  • Installation and configuration of Confidential Cluster Server 4.1
  • Maintenance and troubleshooting Confidential cluster server.
  • Disk and File system management through Logical Volume Manager (LVM) and Confidential Volume Manager (VxVM).
  • Assembled Puppet Master, Agent, and Database servers on multiple Red Hat Enterprise Linux Platforms.
  • Sun Solaris and RedHat Linux (Unix) Server Administration.
  • UNIX & LINUX administration and Server build, in the planning, design, installation, configuration, troubleshooting and performance tuning of AIX, Solaris10, Red Hat Linux, HP UX, IBM X series.
  • Extensively used LVM - created VGs, LVs & disk mirroring in RHEL and Solaris and configured file systems.
  • Installed, configured and supported WebSphere application server.
  • Performing day-to-day admin activities like managing LVM disks, file systems, user creations.
  • Monitor all UNIX Servers for CPU utilization, Network traffic, and hard drive space, Memory using related software.
  • Experience in writing Shell scripts using ksh and bash for process automation of backup and job scheduling.
  • Logging problem case with vendor, coordinating outages with business and handling hardware issues on Solaris and HP servers.
  • Analyzing and handling hardware problems/failures like Memory, Disk, CPU, Control Board etc.
  • Monitoring Disk Activity Checking for free space and removing temporary Core files
  • Creating user environments and profiles as per the user requirement.
  • Troubleshooting and analysis of hardware and software failures for various UNIX servers.
  • Evaluating all the servers email notifications and checking the health of the systems.
  • Provided 24x7 on-call support for UNIX production issues on weekly rotation basis.

Environment: Solaris, UNIX, Linux, Confidential Cluster Server, Puppet, RHEL, Websphere Application Server, Shell Scripts

Confidential, Princeton, NJ

VMWare Administrator

Responsibilities:

  • Extensively managed Active Directory like all the problems related to user accounts, domain accounts, managing permissions etc.
  • Involved in operational support of Active Directory, WINS, DNS, and AD enabled applications.
  • Installing and updating the windows patches.
  • Creating NTFSshares on Windows Servers and provide permissions to users.
  • Setting up perfmon windows servers to analyze performance issues.
  • Built and manage Virtual servers on VMwareESXServer3.0/3.5.
  • Experience in creating Clusters in Virtual Center and adding ESXHosts to Virtual Center Cluster.
  • Experience in setting up VMKernel Network and Enable VMotion.
  • Worked on Migrating Virtual Machines with VMotion.
  • Experience in configuring VMware DRS Rules and VMware HA on Clusters in Virtual Center.
  • Experience in creating and monitoring ResourcePool for Virtual Machines Resource Reservation and Limits.
  • Troubleshoot computer/network, Internet and email problems for users.
  • Creating and managing user accounts and the groups in Active Directory users and computers.

Environment: Linux, UNIX, Active Directory, WINS, DNS, Solaris, AD, NFTS, VMWare ESX Server 3.0/3.5

Confidential

System Administrator

Responsibilities:

  • Writing shell Perl scripting for automation of jobs.
  • Tuning the kernel parameters base on the application/database requirement.
  • Use Confidential file system Confidential volume manager (VxVM) to configure RAID 1 and 0
  • File system tuning, growing and shrinking with Confidential file system 3.5/4.x
  • Installed and configured GFS cluster for holding databases.
  • Validated the servers to check they meet the customer requirements.
  • Setup and manage DNS and DHCP servers.
  • Managed Solaris servers, configured mirroring created users and groups, assigned permission of the groups using sudoers.
  • Setup LANs and WLANs, troubleshooting network problems, Configure routers and access points.

Environment: UNIX, Linux, Perl scripting, Confidential, VMWare, Solaris, LAN, WLAN, puppets

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