SUMMARY

• Seven years of IT experience specialized in System Administration working on Red Hat Linux, Ubuntu, Solaris, Unix, AIX, CentOS, Fedora, OEL, Windows environments, VMware VSphere.
• Experience in Installing, upgrading and configuring Red Hat Linux 5.x, 6.x and 7.x and Debian using Kickstart Servers.
• Experienced in installation, configuration, administration, troubleshooting, tuning, security, backup, recovery and upgrades of IBM AIX, Solaris 2.x, 8, 9, 10, HP - UX 10.x, 11.x, Win NT/2000 Server, Linux (Red Hat & SUSE).
• Worked on Data-Center operation and maintenance across UNIX and Linux platforms.
• Experience in Creation and managing user accounts, security, disk space and process monitoring
• Have worked with the Yum for RHEL and Yast2 for SUSE (SLES 9 and 10 versions) for upgrading the Linux.
• Hardware virtualization using KVM
• Expert in Setting and bringing up the target boards (Hardware) like Intel, PPC and MIPS architecture setting them in the net racks.
• Experience in the implementation of High Availability using Logical Volume Manager
• Experience in implementing and configuring of high availability and redundancy and RAID using Logical Volume Manager, Sun Volume Manager, Veritas Volume Manager 3.x, 4.x, 5.4.x
• Experience in the implementation of naming services like DNS, NIS and LDAP
• Experienced with AIX OS Migration from version 5 to 6.1 using Alt disk as a best practice. NIM (Network Install Management) set up, Performing a NIM installation, troubleshooting. Experienced with NPIV configuration in the VIO environment.
• Responsible for capacity planning, including allocating storage, providing hardware and software redundancy, and planning future expansion requirements
• Experience in the configuration of the of the mail servers like Sendmail 8.13, 8.14.x and Postfix 1.x, 2.x
• Proficient in configuring the Data Communication Devices such as Routers, Switches, Hubs, Terminal servers and Troubleshooting LAN and First Level WAN Related Problems. Analysis of all WAN Links.
• Good hands on experience in Installing, Configuring of servers like Oracle, DB2 good in creating users and groups. Worked for data center migration.
• Good knowledge in customizing and compiling the Linux kernel according to the requirements also good in networking concepts and various communication protocols.
• Created virtual Machines using KVM
• Ran hypervisors,/hosts in KVM
• Ability to handle multiple tasks and work independently as well as in a team.
• Setting up the Jboss, Weblogic, oracle, DB2 connect, WebSphere, MySQL, Tomcat, Apache, Active Directory in Microsoft, sun, Linux and Kerberos server.
• Excellent debugging skills and troubleshooting network related issues both on Ethernet and fiber.
• Preparation of Logical Volume Manager (LVM) with new san LUNs, LUN online migrations using pvmove and LV mirror commands on Linux servers.Having good experience in Red Hat, EMC storage devices, Disaster Recovery like data Recovery, Hitachi storage devices and veritas Netback up version 6.
• Capability to configure scalable infrastructures for HA (High Availability) and disaster recovery.
• Excellent team player with good communication skills and effective time management.
• Experience configuring AIX security settings.

TECHNICAL SKILLS

Operating System: IBM AIX (4.3, 5.1, 5.2, 5.3,6.1),SUSE, Debian, Ubuntu, CentOS,Sun Solaris, RedHat Linux (AS/ES 3/4/5), VMware ESX 4.X, KVM, Windows NT 4.0/2000/2003/ XP/vista

Vmware: VMware Infrastructure Client and VMware ESX Server 4.x/3.x/2.x.

Network Protocols/Services: DNS/Bind, Samba, TCP/IP, NFS, Telnet, DNS, LDAP, SSH, DHCP, NAT, LAN, WAN, ARP/RARP, FTP/TFTP, ifconfig, route, netstat, xinetd, HTTP.

Storage: SAN EMC Symmetrix 800/ DMX1000, 2000 & 3000, EMC CLARiiON 500, 600, 700, NetApp NAS 2000/ 3000 series

Databases: MySQL, PostgreSQL, SQLite, DB2, Oracle

Automation Tools: Kickstart

Mail Servers: SMTP, POP, IMAP, qmail, Sendmail, Postfix

Cluster: Veritas Cluster Server, MC/Service Guard, Sun Cluster

Languages: C, C++, Java, Shell, awk, Perl, Python

PROFESSIONAL EXPERIENCE

Confidential, Lincolnshire, IL

Linux / Aix Admin

Responsibilities:

• Responsible for installing, upgrading and administering the (RHEL 4.x, 5.x, 6.x & 7.x) server
• Configure and install RHEL and CENTOS Linux Servers on both virtual machine and bare metal Installation.
• Responsible for Design of different Release Environments for new projects.
• Implementing new projects builds framework using Jenkins & maven as build framework tools.
• Installed the REDHAT 4.0/5.0 operating system and set up the Oracle environment.
• Performed WebLogic Server administration tasks.
• TroubleshootingWebLogic Application Server connection pools.
• Managed 500 Linux servers with 1 PB of Storage and 100 users.
• Deployed VM on ESX host and Oracle Linux VM’s on ORACLE EXALOGIC.
• Supported 100 Users on Linux, Centos and Ubuntu Operating Systems
• Installation of Red Hat EL 4.x, 5.x using Kickstart and PXE on HP DL380 G3.
• Upgrade firmware RHEL 5 to RHEL 6
• Configured satellite server for patching servers.
• Configured Processes and Process management using Crontab
• Migrated and performed backups using rsync
• Created User accounts management and authentication.
• Involved in hardware virtualization using KVM
• Used KVM for Virtual Machines live migration
• Managing the NFS shares and KVMs in LINUX environment
• Created RHEL Webservers, mail servers, database servers VM in ESX Host 5.5.
• Created mounting, unmounting and fsck File Systems.
• Created Apache Web Server, FTP Server and NFS Server Configuration
• Install Tomcat7 to support Java developers
• Installing and upgrading the kernel, checking and understanding kernel version
• Performed zoning on fiber channel switches and allocated storage to Linux servers from EMC VNX.
• Configured virtual network in Vmware and Linux servers.
• Knowledge about Advance Linux Network and SElinux, Network Security enforcement.
• Installed Apache web server installation and configuration.
• Jumpstart and Flash Installation of RHEL 5.6, 6.x on ESX 5.0, 5.5 for testing, production and disaster recovery setup as required.
• Performed access control and package management using rpm and yum
• Performed Backups using VMWARE VDP Backups of Linux VM’s.
• Patch and Package administration to keep the servers updated with the patches and that implementing packages developed for deployment
• Activate Monitoring on a regular basis to ensure systems loads and performance are not being affected by processes or odd user activity.
• Experience with remedy ticketing system.
• Allocated 3200GB storage to expand existing DB Instance to 6400GB Raw. This storage is for an oracle RAC database which is in a clustered environment on 4 standalone AIX servers.
• The LUNs added to RAC DB were using Oracle ASM (Automatic Storage Management) and not AIX LVM.
• Each server in Oracle RAC cluster required SAN disk storage dedicated to itself, as well as SAN disk storage that is shared between all servers in the cluster and all these LUNs were using Oracle ASM (Automatic Storage Management).
• Given Alias names to LUNs and made them to be visible and usable on ASM as per the RAC requirement. Once the LUNs were allocated to RAC ASM they were to be managed by Oracle DBA’s
• Controlling the System Logging services, and examining system log files
• Creation and administration of software packages and checking the integrity of installed packages Using native rpm on Redhat servers.
• Monitoring System Performance of Virtual memory, Managing Swap Space, Disk utilization and CPU utilization.
• Day-to-day functional administration tasks, as well as application-specific technical support.
• Server decommissioning and deployment activities

Environment: RHEL 5,6,7,ESXI 5.5,KVM, ORACLE EXADTA, LVM, VeritasNetbackup 6.5, Oracle 10g and Powerpath, Microsoft Windows 2003,Apache Web Serves, Tomcat,Yum,AD, Dell PowerEdge 1850, 2850, HP DL380 G3, HP DL570 G8, c3000, EMC VNX 5600,Brocade 6510, BMC Remedy.

Confidential, St Louis

Linux Administrator

Responsibilities:

• Responsible for the operation, maintenance and integrity of a distributed networked Linux/AIX environment.
• Provided support for more than 700 RedHat, Cent OS servers.
• Expertise in creating VM Templates, cloning and managing Snapshots.
• Configured and deployed multiple VM’s using VSphere client.
• Expertise in configuring Red Hat Cluster Nodes for any legacy applications and verified the daily health check on the Cluster Nodes utilizing clusters.
• Installing and configuring Saltstack, writing manifests to automate day-to-day activities.
• Managed 500 servers using Saltstack to install and update system, application configurations.
• Experience in configuring monitoring tools like Xymon.
• Performed system performance monitoring, created alerts and benchmarking for performance analysis on all application & production servers.
• Developed multiple shell scripts for system monitoring.
• Monitored server and application performance & tuning via various stat commands (top, sar, iostat, vmstat, netstat, mpstat, prstat, nfsstat, prtconf, prtdiag, iostat, top, printmgr, hpimliview, dmidecode, smc etc) and tuned I/O, memory etc for SUN Solaris and RHEL Servers.
• Provided troubleshooting solutions through automations and monitoring system stats on Splunk applications with the help of Splunk-dashboards during new releases.
• Expertise in handling crisis during heavy load on servers and maintaining zero downtimes.
• File system management - Creation, Deletion, File Systems Changes - Grow and Shrink, Disk Storage Management in AIX - Logical and Physical Volume Configuration and maintenance, Monitoring systems, CPU, memory and disk utilization using topas, sar, vmstat, netstat etc.
• Troubleshooting booting related issues, creating boot records, working with system maintenance mode, recovering root password, fixing booting related issues, working with bootlist.
• User Management - Creating, maintaining, and removing users and groups. Security settings on user accounts and groups. Working on System Management Services SMS and changing boot list order etc.,
• NFS Administration, exporting file systems, mounting exported file systems, working nfs daemons and fixing any mounting issues.
• Configuration of new devices using cfgmgr - faulty disk Replacement incase of any disaster.
• Responsible for the AIX Migration Installation from 5.2, 5.3 to AIX 6.1 both regular and NIM Alt disk migration.
• Experienced with Logical Volume Manager (LVM). Working with mirrored logical volumes.
• Experienced with upgrading the hardware and Firmware levels of the PSeries servers.
• Responsible for taking regular backups as mksysb and savevg and restoring them when needed.

Environment: 500+Linux, 200+ AIX Servers, DELL, HP ProLiant DL-380 G4/G5, pSeries ( p550, p520), RHEL(6.x,5.x), AIX 5.3/5.2/5.1, Oracle, MySQL, Tomcat.

Confidential

Linux Engineer

Responsibilities:

• Installing and upgrading OE & Red hat Linux and Solaris 8/ & SPARC on Servers like HP DL 380 G3, 4 and 5 & Dell Power Edge servers.
• Experience working in AWS Cloud Environment like EC2 & EBS.
• Implemented and administered VMware ESX 3.5, 4.x for running the Windows, Centos, SUSE and Red hat Linux Servers on development and test servers.
• Installed and configured Apache on Linux and Solaris and configured Virtual hosts and applied SSL certificates.
• Implemented Jumpstart on Solaris and Kick Start for Red hat environments.
• Experience working with HP LVM and Red hat LVM.
• Experience in implementing P2P and P2V migrations.
• Involved in Installing and configuring Centos & SUSE 11 & 12 servers on HP x86 servers.
• Implemented HA using Red hat Cluster and VERITAS Cluster Server 5.0 for Web Logic agent.
• Managing DNS, NIS servers and troubleshooting the servers.
• Troubleshooting application issues on Apache web servers and also database servers running on Linux and Solaris.
• Experience in migrating Oracle, MYSQL data using Double take products.
• Used Sun Volume Manager for Solaris and LVM on Linux & Solaris to create volumes with layouts like RAID 1, 5, 10, 51.
• Re-compiling Linux kernel to remove services and applications that are not required.
• Performed performance analysis using tools like prstat, mpstat, iostat, sar, vmstat, truss, Dtrace.
• Experience working on LDAP user accounts and configuring ldap on client machines.
• Upgraded Clear-Case from 4.2 to 6.x running on Linux (Centos &Red hat)
• Worked on patch management tools like Sun Update Manager.
• Experience supporting middle ware servers running Apache, Tomcat and Java applications.
• Worked on day to day administration tasks and resolve tickets using Remedy.
• Used HP Service center and change management system for ticketing.
• Worked on the administration of the Web Logic 9, JBoss 4.2.2 servers including installation and deployments.
• Worked on F5 load balancers to load balance and reverse proxy Web Logic Servers.
• Shell scripting to automate the regular tasks like removing core files, taking backups of important files, file transfers among servers.

Environment: Solaris 8/9/10, Veritas Volume Manager, web servers, LDAP directory, Active Directory, BEA Web logic servers, SAN Switches, Apache, Tomcat servers, WebSphere application server.

Confidential

Systems Administrator

Responsibilities:

• Involved in the analysis, design, and development phase of the application.
• Created Class, Activity, and Sequence Diagrams using IBM Rational Rose modeling tool.
• Handled tasks such as password reset requests, printer and print queue problems and connectivity troubleshooting. Also responsible for the installation, administration and maintenance of Linux servers.
• Upgrade the operating system and applications as and when necessary. Server upgrades and daily user support.
• Installed centos using Pre-Execution Environment boot and Kick Start method on multiple servers.
• Monitored the file systems and CPU load for better performance.
• Closely controlled the production environment to ensure stability and uptime.
• Closely monitored networks and security to ensure stability.
• Preparation of operational testing scripts for Log check, Backup and recovery and Failover.
• Creation and implementation of shell scripts to take care of DB backup, monitoring alert log and log rotation reports.
• CRON job automation for backups and recurring jobs needed for other applications
• Administered DNS and DHCP.
• Installation of database on Linux servers for clients and in-house requirement. Used SQL and PL/SQL extensively to code the backend of the applications.
• Aided data base administrators in installing data bases, building data base, refreshing and overlaying data bases, removing data bases, and backing up of all data bases.
• Assisted in installation and maintenance of workstations, servers, networking equipment, and other supporting hardware.
• Developed Triggers, Procedure and Views in Oracle and PL/SQL to support requirement and also maintained it.
• Involved in debugging and troubleshooting related to production and environment issues
• Configured the routers and setup firewall rules.
• Monitored the network traffic through Wireshark, TCP dump tools.
• Troubleshooting report/query issues
• Monitoring System Metrics and logs for any problems.
• Adding, removing, or updating user account information, resetting passwords, etc.
• Using java JDBC to load data into MYSQL.
• Maintaining the MYSQL server and Authentication to required users for databases.
• Creating and managing Logical volumes.
• Maintaining the MYSQL server and Authentication to required users for databases.

Environment: Centos, PL/SQL, JDBC, Java, Rational Rose.