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Linux Admin Resume

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RemotE

SUMMARY:

  • Over 7+ years of experience in IT industry, in the area of System Administration.
  • Extensive System Administration experience in heterogeneous environments comprising Unix, AIX, Linux 3,4,5,6.
  • Excellent in patches and packages installation.
  • Experience in implementing High Availability Clusters using Veritas Clustering, Redhat Cluster Server.
  • Configuration of NIS, NFS, SAMBA, SENDMAIL, APACHE SERVICES on Linux & Unix Environment.
  • Experience in VERITAS Volume Manager, configuration and maintenance VERITAS File System.
  • Experience in Logical Volume Manager for creation of Volume groups / Logical Volumes and File systems in UNIX environment.
  • Experience in GPFS, GFS2, LVM and SAN/NAS storage.
  • Experience in creating physical volume, logical volume, volume groups using LVM’s in Linux.
  • Advanced knowledge and skills in Linux Operating System, High Availability/Clustering, System Backup/Restore, Kickstart and Logical Volume Manager software products.
  • Excellent in Configuring and Administering NFS, SMTP, DHCP, samba in heterogeneous environment.
  • Configured and Administered HACMP 4.5, 5.1, 5.2, 5.3, 5.4, 5.5 IBM PowerHA.
  • Installation, Configuration and administration of LPAR’s.
  • Installation, administration of VIO Server and VIO client LPAR’s.
  • Experience in installation, configuration, tuning, security, backup, recovery and upgrades of IBM AIX
  • Expertise in Tivoli monitoring, Tivoli Storage Manager (TSM), Tivoli License Manger (TLM), Server Resource Manager (SRM) and Control - M Scheduler.
  • Replaced failed hard drivers, memory dimm’s, back planes, CPU component’s, Fiber Channel Adapters (HBA’s), NiC cards and other hardwares.
  • Experience in Binding Luns, Naming, and resizing, Unbinding LUNs and configured in power path.
  • Expert in Datacenter Operations including hardware, software setup monitoring, troubleshooting on a 24 x 7 basis with Tivoli monitoring tool and Remedy Ticketing Systems.
  • Study of integration of a FIM (File Integrity Monitoring) tool to comply with audit requirements (Tripwire-based).
  • Provide support to SQL, MYSQL, Oracle, Data guard and DB2 database while coordinating with database teams.
  • Experienced in Writing and Updating Shell Scripts and Perl Scripts.
  • Experienced in Installation and Configuration of Web Sphere Application server V3.5/4.0/5.x,6.x, IBM HTTP Server, Sun-one Webserver on AIX, Solaris and Linux platforms.
  • VMware Infrastructure 3.x Installation & Configuration.
  • Planning and Designing VMware VI3 (ESX3.x/ ESXi/ Thin ESX and VMware Virtual Center).
  • Expertise in managing application tools Jump Start, Solstice Disk Suite, and SVM.
  • Configuring & Troubleshooting NFS Servers and Clients, in UNIX Environment.
  • Implementation of RAID levels like 0, 1, 0+1, 5 using VERITAS Volume Manager.
  • Good exposure to Network Storage Solutions like DAS, NAS and SAN.
  • Very good exposure of the migration process using SRDF, involved in V2V, P2P and re-installs.
  • Provide lun mapping to EMC for the storage to replicate to new data center.

TECHNICAL SKILLS:

Operating systems: IBM AIX (5.1, 5.3,6.1), Red Hat Linux (RHEL 3/4/5)

Server Hardware: Excellent Hardware skills on Sun Fire V100/V120/V240/V440/V480/V490 /V1280/V880/ V890, Sun Enterprise 250/220R/420R/2900, HP Proliant DL 585/360/385/585 G2, rx8640, rp7420, rp8420, N-Class, L-Class, D-Class, K-Class, IBM e-Server Regatta P690, P570, RS6000, IBM/HP/DELL Blade Servers

Storage Hardware: Symmetrix DMX 800/1000 / DMX-2 / DMX-3 & EMC CLARiiON FC and CX series, FC JBOD, Brocade FC Switches, Net App Filers, Qlogic and Emulex FC HBAs, Brocade silk worm 3200, 3800,48k, iSCSI/ FC Storage arrays, RAID Storage arrays, DLT and LTO Tape Libraries.

Web/Application Server: Tomcat, Apache, WebSphere, Weblogic.

Languages: C, Clearcase, Shell scripting Bourn Shell, Perl and Ruby

Networking Services: NIS, NFS, AutoFS, DNS.

Virtualization Products: VIO, VMware VI 3.x, VCenter Server, VMware Server, Xen, Solaris Zones.

PROFESSIONAL EXPERIENCE:

Confidential, Remote

Linux Admin

Responsibilities:
  • Provided on-call support by rotation to provide 24x7 support.
  • Acquired comprehensive requirements from Project Managers, Team Leads pertaining to the servers to be migrated.
  • Utilized Infoman and Infoweb for data center service requests (Network requests for IP’s, ILO’s, and DNS changes).
  • Installation, Configuration and maintenance of the Redhat Linux and Solaris Servers.
  • Build, configured, and deployed RedHat/Windows virtual servers in a VMware vCenter environment.
  • Experience in installing and configuring LDAP on various OS platforms.
  • Good knowledge of Lan/Wan, AWS, Perl, Python, Bash, Openstack, Netbackup, Nginx, Ruby, SLAs, OLAs.
  • Installed VMware and ESX Host servers with kickstart.
  • Dealt with AIX side of SAN; troubleshooting fiber card adapter, replacing fiber card adapters and configuring LUNs back.
  • Experience in openstack and puppet configuration tool.
  • Installed, configured, and maintained WebLogic 11.x and Oracle 11g on Unix & Redhat Linux and Centos.
  • Hands on experience on Openstack deployments.
  • Installation, configuration, and administration of VMware vRealize, Solaris Zones, Containers, and Ldoms
  • Experience on Active Directory, GPO’s, DHCP, SLES, DNS, SUSE, File & Print Server, IIS (Web Server), Implementing and Upgrading windows 2008 R2 domain controllers.
  • Install, configure and administer MQ 5.3/6.0 on AIX, Linux and Windows environments.
  • Experience on Windows 2003/2008 Cluster administration and service monitoring. Experience in Windows 2003, 2008, 2008 R2 and Windows Server 2012. 2012 R2 base Servers at single and multi-domain platforms.
  • Scripting knowledge on PowerShell VBS writing scripts for customization.

Environment: Red Hat Enterprise Server (RHEL 3, 4 and RHEL 5), IBM AIX 5.3 & 6.1, LINUX, UNIX.

Confidential,Springfield,MO

Linux/Devops Engineer

Responsibilities:
  • Provided on-call support by rotation to provide 24x7 support.
  • Acquired comprehensive requirements from Project Managers, Team Leads pertaining to the servers to be migrated.
  • Coordinated with the Storage, Network and Hardware teams on server provisions (HP Proliant DL385/585 G5, G6 servers, and HP BL465C G5 blade centers), IBM RS 6000,550,520,570,595.
  • Utilized Infoman and Infoweb for data center service requests (Network requests for IP’s, ILO’s, and DNS changes).
  • Installation, Configuration and maintenance of the Redhat Linux and Solaris Servers.
  • Build, configured, and deployed RedHat/Windows virtual servers in a VMware vCenter environment.
  • Experience in installing and configuring LDAP on various OS platforms.
  • Installed VMware and ESX Host servers with kickstart.
  • Configuration and maintenance of Nagios, Puppet, CHEF, MySQL, Kickstart, LDAP Server, Sendmail, Apache (2.x), NFS, CIFS, DHCP, NTP and SSH
  • Knowledge of Linux technologies (PAM, proc filesystem and sysctl)
  • Experience with CHEF automation tool for creating new virtual machines and deploying applications to support complex infrastructure.
  • Automate the build Process for Linux Virtual and deploy applications and manage features quickly and efficiently using CHEF Automation tool.
  • Experience with Perl, Shell and RUBY scripting
  • Experience with WebSphere Application Server System Installation, Configuration, Deployment, Administration and Production Support on heterogeneous systems like AIX & Linux.
  • Created Clusters and instances in WebSphere Network Deployment to support high availability, fail over and implemented horizontal clustering.
  • Configured WebSphere Recourses like JDBC Providers, JMS providers. Worked with Global Security, SSL and LDAP.
  • Experience in troubleshooting, applying patches and plug-in for WAS 5.0/6.0/7.0
  • Build and configured migrations of Linux (V2V, P2P and Lift and Shift on RHEL 5).
  • Automated server building using System Imager, PXE, Kickstart and Jumpstart.
  • Built, configured, and deployed RedHat virtual servers in a VMware vCenter environment.
  • Defined, documented and implemented hardened, standardised operating system images based on Red Hat Linux Enterprise 4,5,6.
  • Build, configure and deploy Virtual machines and templates.
  • Hands on experience in configuring ESX, ESXi and vSphere4 with virtual center management.
  • Took part in VMware ESX (3.5,4.1) installation, updates, patches, and gathered information for capacity and performance analysis to identify potential servers for virtualization.
  • Installation, Configuration and Administration of IBM WebSphere Application Server 5,6 & 7 and WebSphere Portal Server 5.1.0.4 on AIX and Linux platform.
  • Strong knowledge in IBM Websphere Application Server (WAS) 6.0x - 7.x, Websphere Portal 6.1.
  • Setup and configure failover load balancing using IP bonding for network cards.
  • Worked on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager. File system Tuning and growing using VERITAS File System (VxFS), coordinated with SAN Team for storage allocation and Disk Dynamic Multi path.
  • Used Iptables to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel.
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
  • Updating YUM Repository and Redhat Package Manager (RPM).
  • Applied appropriate support packages/patches to maintain system integrity.
  • Setup and manage GPFS cluster in a mixed AIX/Linux environment with multiple clustered filesystems on shared SAN disk storage.
  • Administration of RHEL 5 which includes installation, configuration, testing on both physical and virtual machines.
  • Capturing the image of production server, Configuring RAID and build the new server using the image on system imager server with PXE boot.

Environment: Red Hat Enterprise Server (RHEL 3, 4 and RHEL 5), IBM AIX 5.3 & 6.1, LINUX, UNIX

Confidential, Springfield, MO

Redhat /Linux Administrator

Responsibilities:
  • Providing on line support for Sun/Linux servers in a Data Center Production Environment
  • Planning, installing and configuration of operating system on new Sun/HP Servers.
  • Configured System imager for Linux Servers and used it for Cloning, software distribution and OS updates.
  • Installations using PXE boot, Maintenances and troubleshooting hundreds of Linux Servers.
  • Adding/expanding new storage to existing/new systems using LVM, Veritas Volume management VXVM and Vxfs on Linux/SUN servers.
  • Worked on Solaris servers supporting all the OS administration, application and hardware issues.
  • Very good working experience on Redhat Satellite Server upgrading and patching.
  • Building Linux servers by using VMware ESX 3.0 and and also involved in channels and pushing the packages in Redhat Satellite Server.
  • Responsible for leading the effort through full life cycle of the Upgrade project for Oracle and SAP environment from AIX P5 to P6 and AIX 5.3 to 6.1.
  • Responsible for installation administration of AIX 4.3, 5.1, 5.2, 5.3, 6.1 and 7.1.
  • Configured and Administered HACMP 5.3, 5.4, 5.5 IBM PowerHA.
  • Installation, Configuration and administration of LPAR’s.
  • Installation, administration of VIO Server and VIO client LPAR’s.
  • Migrating AIX OS from AIX 4.3 to 5.1, 5.2 and 5.3, 5.3 to 6.1 on models of p-series hardware.
  • Implemented upgrade of servers using Redhat Satellite Server.
  • Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using Veritas Cluster Server in SAN environment.
  • Setup NFS file systems and shared them to clients.
  • Planning, Installation, administration, Trouble shooting of HP-UX (IA64) Servers
  • Troubleshooting and configuring NAS and NFS mount points.
  • Troubleshooting network, application, and server related issues.
  • Scheduling of automatic repetitive Jobs, and Shell Scripts with Crontab.
  • Monitoring Virtual memory, Swap management, and Disk and CPU utilization by using various monitoring tools.
  • Monitoring and configuration of various servers using Puppet modules.
  • Primarily applications support, config changes, trouble shooting server issues for QA/Stage/Production, monitoring issues through systems like Jira, Zabbix.
  • Implemented rapid provisioning and life cycle management for Redhat linux using kickstart and puppet.
  • Improved Linux OS deployment and management by creating customized kickstart scripts and installing puppet.
  • Patch updating of HP-UX servers
  • Used puppet for central management of Linux configuration files and software package management.
  • Implementing RAID 0, 1 and 0+1 levels using Veritas Volume Manager.
  • Created RPM packages using RPMBUILD, verifying the new build packages and distributing the package.
  • Installed Red Hat Linux on Intel Machines, Configured File Systems and Raw - Devices.
  • Installed various RPMS on Linux.
  • Involved in mass migration of data form old EMC Storage subsystems to new Subsystems.
  • Installed and Configured Veritas Net backup client and advanced client software’s in Production servers.
  • Administer, maintain and troubleshoot EMC CLARiiON arrays.
  • Creating volumes, LUNs and implementing different RAID levels on the same
  • Configured and created snapshots of clones of LUNs using EMC Snap View
  • Implemented replication of data within sub storage systems using SAN Copy and Mirror View software.

Environment: UNIX, LINUX, HP & DELL Blade Servers Linux RHEL 4/5, SUN High End series E25K, E15K and E10k, SUN Fire, V480, V440, V240, HP rp series, Blade Servers. EMC storage. Tivoli SAN manager, solstice disk suite (SDS), HP data Protector, Remedy Ticketing System.

Confidential,ST Louise,MO

Linux Engineer

Responsibilities:
  • Providing on line support for around 900 SUN/HP/IBM/DELL servers in a Data Center Production Environment
  • Design and Implementation of enterprise servers with high availability (Veritas Cluster)
  • Install and administer Veritas volume manager and managing file systems.
  • Installation and Configuration of VCS, Configuring VCS Response to Resource Faults, Cluster Communications, Maintaining VERITAS Cluster Server
  • Actively participated and supported in the migration of 460+ production servers from old data center to New Data Center
  • Immediate acknowledgement of issues & solving them while constantly updating status for all levels of severities and provide RCA report.
  • Coordinating with SAN team to create new disk volumes for ORACLE and Sybase database teams
  • Installation, configuration and driver upgrades of HBA's on UNIX and LINUX servers.
  • Power Path software installation, configuration and administration on UNIX and Linux Servers.
  • Encapsulating and mirroring the root disk.
  • Logging events and forcing crash dumps, securing servers and troubleshooting issues.
  • Co-ordination with Application team for performance/upgrade related issues.
  • Co-ordination with backup team for recovery of files/slices.
  • Reporting ticket status and communicating with requestors & box owners over Voice Conference Bridges in case of severities.
  • Configuration and administration of NIS, NFS & DNS environment
  • Create and maintain technical documentation for new installations and systems changes as required.
  • Providing solutions to client about Disk mirroring and RAID implementation using Solstice Disk Suite and VERITAS Volume Manager & Cluster
  • Maintaining, Upgrading, Troubleshooting Hardware (MBD/CPU/Memory replacement, network problems, console problems, hard disk errors etc.) of sun servers like SF V100/V120/V240/V440/V480 / V490/V1280 /V880, Enterprise 220R/420R/6500.
  • Coordinate with vendors SUN, IBM, HP, and VERITAS for RCA’s.

Environment: UNIX, LINUX, AIX 5.3, Linux. NETRAT1, Ultra 1/2/60, SF V100/V120/V240/ V440/ V480/V490/V1280/V880/V890, Sun Storedge S1, E220R/420R/2900/6500; HP DL 585 G2, IBM p5 series, EMC Symmetrix DMX 2000/3000.

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