Unix/Linux Admin

Rehan

Phone: 214-***-****

*****.****@*****.***

mailto:***************@*****.**.**

PROFESSIONAL SUMMARY:

Over 8+ years of experience in IT industry, in the area of System Administration.

Extensive System Administration experience in heterogeneous environments comprising Solaris, 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.

Experience with Puppet 3.X and 4.X and also familiar with Razor technology

Build and upgraded puppet master for each Dev/QA/Prod environment.

Familiar with Hiera and Mcollective tools

Created custom Hiera data directory for customers to classify classes

Generate reports using Mcollective tool.

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.

Used puppet for central management of Linux configuration files and software package management.

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: Solaris 10/9/8, Red Hat Linux (RHEL 3/4/5), IBM AIX (5.1, 5.3,6.1),

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 DL585/360/385/585 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 Ksh & Bourn Shell

Networking Services: NIS, NFS, AutoFS, DNS.

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

CERTIFICATION

Redhat Certified Engineer

EDUCATION:

Bachelor of Engineering in Computer Sciences, Pakistan.

PROJECTS AND EXPERIENCE

JP Morgan Chase, Columbus Jul’14 –Present

Sr. Unix System Admin

Responsibilities:

Provided on-call support by rotation to provide 24x7x365 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).

Installed and configured IBM Web Sphere Application Server 3.5/4.0/5.0 on AIX and Linux.

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.

Wrote cron jobs for Redhat servers, integrated with Sendmail, automated FTP uploads/downloads, scp for automated batch file transfers.

Expertise in User and Group administration. Good exposure in ID management.

Install and configured sudoers and giving temporary sudo access to app or database team when required.

Experience in installing and configuring LDAP on various OS platforms.

Hands on knowledge of TCP/IP, Multicasting and network concepts (DNS, DHCP, NFS, NAT, UDP, VLANs).

Responsible for upgrades, configuration, and deployment of Apache Tomcat, httpd, IHS, WAS and several other software packages.

Experience with Puppet 3.X and 4.X and also familiar with Razor technology

Build and upgraded puppet master for each Dev/QA/Prod environment.

Familiar with Hiera and Mcollective tools

Created custom Hiera data directory for customers to classify classes

Generate reports using Mcollective tool.

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.

Used puppet for central management of Linux configuration files and software package management.

Involved in large data center migration – planning, designing, moving servers to new data center, coordinating & troubleshooting issues with various data center, network, application and storage teams.

Designed and administrated server consolidation program through use of VMWare ESX server and VMware virtual center.

Build, configure and deploy Virtual machines and templates.

Hands on experience in configuring ESX, ESXi and vSphere4 with virtual center management.

Performed live migrations and consolidated the physical servers to VMware infrastructure virtual machines with shared storage across EMC clariion, Dell and Open filer SANs.

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.

Experience in administrating the infrastructure for Websphere Portal, Application Servers (Websphere, WebLogic, etc.), Web Servers (IBM Http Server, IIS, etc.), Web Services, XML, HTML.

Support project / development teams during development / implementation phases of projects.

Trouble shooting errors both Application & JVM also analyzed heap and core plus error logs – configured tuned JVM for optimum performance.

Technical support to production's team for deployment and administration.

Wrote perl and shell scripts to automate certain system administration tasks.

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.

Experience in iptables commands including those used to add, append, delete, insert, or replace rules within a particular chain, parameters are required to construct a packet filtering rule.

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.

Configure fcs for each GPFS node in cluster and strong skills on mm commands.

Install and configure GPFS cluster, create node file, network shared disks and GPFS.

Migrate AIX 6.1 with GPFS and TSA cluster using fork lift move method.

Setting up cron schedules for backups and monitoring processes.

Troubleshooting and administering High Availability using Redhat Cluster, VERITAS Cluster Server on various business critical database & application production servers.

Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.

Monitored system activities and fine tuned system parameters and configurations to optimize performance and ensure security of systems.

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.

Migrating VCS, Oracle RAC and Redhat Clusters with gfs filesystems servers across the Data Center, which includes Configuration of new IP, VIP and Prative IP.

Adding Oracle ASM disk to the server. Creating and managing LVM.

Installation and configuration of Powerpath, Solution Enabler, RSA Envision, ITM, ITIM and BMC.

Experience in NTP, DNS, Homedir, LDAP on various Unix platforms AIX, Linux and Solaris.

Involved in Migrating AIX OS from AIX 5.2, 5.3 to 6.1 on 520, 550, 610,RS/6000 Servers

Administering and troubleshooting of AIX HACMP Clusters.

Installation, configuration and administration of IBM Web Sphere Application Server V4.0, on AIX along with DB2 UDB & IBM HTTP server with SSL for secure communication & providing technical support to users.

Helped and administer in fork lifting P-series P590, P595 and Regatta to new data center.

Worked on various clusters like HACMP, Redhat, Veritas, GPFS and TSA.

Deport/Import Volume Groups.

Environment:

OPERATING SYSTEMS: Red Hat Enterprise Server (RHEL 3, 4 and RHEL 5), AIX 5.3 & 6.1, Solaris 8, 9 and 10

HARDWARE : DELL PowerEdge 2850, 2950, 6850, 6950, HP DL 585, 380, 385, SE 1210, IBM p5 Series and Blade Servers and Superdome, HP Blade servers, EMC and Symmetrix/Clariion Storage.

CVS Caremark, Scottsdale, AZ Jul 2012 –Jun’14

Sr UNIX Adminstrator/ System Admin

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.

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.

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 : Solaris 8/9/10, HP-UX 11.x, 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.

GE Employee Reinsurance Corporation, Kansas March 2011 – June 2012

Sr System 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

Involved in decommissioning servers project as per the company procedures and update the hardware inventory database.

Creating documentation for datacenter hardware setups, standard operational procedures and security policies

Switching the service groups from one node to another.

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: Solaris 8/9/10, 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.

Citibank, New York, NY Apr 2007 – Mar’ 2011

UniX/Linux Admin

Responsibilities:

Installation and configuring of SUN Solaris and Linux servers.

Involved in Building and configuring Solaris 8/9/10 using Jump start server and Red Hat Linux Servers using KickStart server as required for the project. Maintained maximum uptime and maximum performance capacity for Enterprise Production, QA, and UAT/Staging.

Incident management for Unix Servers (Solaris, Linux).

Installed and configured Solaris 10 servers with Zones and containers with Sun ZFS.

Primary responsibility includes building and supporting Solaris/ Redhat Linux 3,4 servers.

Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, WebSphere and Weblogic application server.

Implemented SUDO, SSH and other security tools and implemented SOX (Sarbanes Oxley) security compliance.

Assisted in configuring the application servers with other components such as database, web servers, LDAP directory, Active Directory, BEA Web logic etc.

Extensive use of Veritas Volume Manager for Disk management, file system management on Sun Solaris environment.

Extensive use of Korn shell, Bash for scripting.

Expertise in Linux backup/restore with tar including disk partitioning and formatting.

Involved in Planning, building and Administration of various High Availability clusters and heart beat checking on Sun Solaris using VCS in heterogeneous SAN environment.

Regular disk management like adding / replacing hot swappable drives on existing servers/workstations, partitioning according to requirements, creating new file systems or growing existing one over the hard drives and managing file systems.

Planned, scheduled and Implemented OS patches on both Solaris & Linux boxes as a part of proactive maintenance.

Worked with other IT teams, customers (users), and other managers in helping build and implement systems and standards.

Involved in migration of projects from one flavor to another one.

Involved in development, user acceptance, and performance testing, production & disaster recovery server.

Environment: Solaris 8/9/10, Red Hat Linux 4/5, Veritas NetBackup, Korn Shell, Bash Scripting, Veritas Volume Manager, web servers, LDAP directory, Active Directory, SAN Switches, Apache, Tomcat WebSphere, Weblogic application server.

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