SUMMARY

• Around 9 Years of Experience in UNIX/Linux system administration, configuration, performance tuning, troubleshooting, installing, updating software packages (RHEL - 4.X, 5.X, 6.X, 7.X, SUSE-10.X, 11.X, Oracle Linux (4.X, 5.X, 6.X, and 7.X), Networking and writing UNIX shell scripts.
• Experience in designing, implementing virtual datacenter on the top of the VMWARE ESXi 2.X, 3.X, 4.X, 5.X, Red Hat Enterprise Virtualization 2.X, 3.X
• Experienced in installation, configuration, management and troubleshooting of critical application servers such as Oracle DB, MySQL database, Apache Tomcat 6.x/7.x/8.x.
• Expert in Red Hat Linux 4.X, 5.X, 6.X & 7.X of heavy experience in install / rebuild servers. Understanding the business requirements, capacity planning, Vendor management, team co-ordination, business migration. Patching and Packages rollouts.
• Experience in volume management, software RAID, disk management, VERITAS volume manager, Veritas File System (VxFS), Logical Volume Manager (LVM).
• Expert in managing, administering and installing RHEL services such as DNS, FTP, NFS, Samba, SMTP, HTTPD, NTP, Yum, SSH, SNMP, Firewall, Iptables, etc.
• Experience in designing, administering and configuring Red Hat high availability cluster, storage cluster, load balancing cluster, high performance cluster and Hadoop cluster both the cloud platform and datacenter level.
• Experience in managing the Red Hat package manager (rpm, yum), Red Hat satellite server, patching, upgrading software, installing third party software for server monitoring and management.
• Experience in monitoring the network and hosts using the Nagios, BMC, and HP Openview. Expertise in RHEL installation using the Kickstart and configuration management using tools Puppet.
• Experience in deploying application and designing cluster on the cloud platform such Amazon Web Services (AWS) and Google cloud platform. Proficient in setting up Amazon EC2 instances, security groups and virtual private could (VPC).
• Experience in job and task automation using the Cron, Nice (RHEL tools).
• Good noledge on UNIX shell scripting, Python, Perl and PowerShell scripting.
• Responsible for setting up disaster recovery environment for Linux servers and implemented all the DR procedures as per the guidelines.
• Experience in Installing, Configuring, and Implementing Virtualization Environment Using VMware ESX
• Coordinated with SAN Team for storage allocation and Disk Dynamic Multi pathing.
• Experienced in racking new servers / storage arrays, configuring RAC IP, setting up virtual disks in different RAID levels and getting them ready for OS install.
• Excellent Communication, Analytical skills and Interpersonal skills. Exceptional ability to learn new concepts
• Skilled at accessing client needs, working in a group, suggesting ideas that enhance Efficiency and Maximize Performance

TECHNICAL SKILLS

Operating Systems: Sun Solaris 7, 8, 9 & 10 (SPARC & x86), RHEL 4/5/6, AIX 4.3/5.1/5.2/5.3, OEL 4, 5 &6, Ubuntu, HPUX 10.x/11.x, VMware ESX/ESXi 3.5/4.1/5.

Hardware: Sun Fire, Sun Enterprise Servers, HP DL360, 580 G4, G5, &G6, HP C7000 & C6000 Blade Enclosures, IBM Blade center and Dell servers, various HP and Lenovo Servers.

Tools: VERITAS Volume Manager, Veritas Cluster Server, VERITAS Net backup, VMWare ESX, Redhat Satellite 5.x, 6.x

Version Control: Git, Git Hub

Internet tools: Apache Web Server on Linux and Solaris, WebLogic, Jenkins, Sendmail, Postfix, WebLogic, JBoss and Apache Tomcat.

Software: R, MS Office, Adobe Photoshop

Languages: Shell Script, SQL, Python

Databases: Oracle9i,10G,11G, MySQL, SQL Server

Networking Protocols: SNMP, SMTP, TCP/IP, IPX/SPX, SLIP, UUCP, LAN, WAN, PCNFS, ARP/RARP,FTP/TFTP, RIP, DHCP, DNS, NIS, NIS+, Auto mounter.

Server Management: SUN Solstice Disk & Admin Suites, VxVM, KVM SMC, HP Open View, Puppet, Foreman, Nagios, Dockers Amazon EC2 and S3.

PROFESSIONAL EXPERIENCE

Confidential, Eden Prairie, MN

Lead Linux Engineer

Responsibilities:

• Worked on Puppet to organize and execute configuration plans on servers& worked on modules of Puppet for its manifests on servers
• Build and manage VMWare virtual server environment.
• Configured and managed LVM on RHEL using lvextend, lvcreate, lvreduce, resize2fs etc
• Installed and configured Sudo access for users to access the root privileges.
• RPM and YUM package installations, patch and other server management.
• Installed and configured Apache Web Server.
• Installation, Configuration, and OS upgrades on RHEL 5.X/6.X, SUSE 11.X, 12.X.
• Administered security, users, group administration and daily backup and restore operations, networking service, performance and resource monitoring and Performed disaster recovery management procedures.
• Managing the user environment by adding, modifying and removing user accounts from the environment and limiting access to appropriate nodes.
• Configuration of Hardware and Software RAID. Disk replacement and File system recovery.
• Performance tuning and troubleshooting of the applications arising out of the ticketing systems in Remedy.
• Installing, integrating, tuning and troubleshooting Apache HTTP server
• Experience in virtual environments (VMware)
• Knowledge of Backup/Recovery/Upgrade procedures
• Experience with x86 bootstrap process (BIOS)
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers
• 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.

Confidential

Sr. Linux Administrator

Responsibilities:

• Yum configuration & package installation through YUM.
• Creating the VM shell and pushing the operating system using the Kickstart server.
• Configuring and deploying of iSCSI server and Client.
• Installation of Red Hat EnterpriseLinux.
• Configuration and troubleshooting for Red HatLinux.
• Configure vCenter Server 5.0 in production environment and created many cluster and enabling HA and DRS for Load balancing and High Availability. Worked on Migration concepts like Vmotion, SVmotion and cold migration.
• Installed and configured ESXi 5.0, 5.1 Servers on Blade servers. Creating Virtual machines. Creation of templates from VMs and Creation of VMs from templates.
• Experience in Windows 2003 and2008 Active Directory Installation and Configuration.
• Heartbeat clustering for high availability in Apache.
• Handling troubleshooting issues like boating, RPM packages, User management and backup.
• IP bonding for load balancing and fail over, Firewall, SELINUX.Hosting and securing web pages using Apache web server and ssl.
• Configuration andadministrationof LDAP, NFS, FTP, SAMBA and POSTFIX Servers in Red Hat EnterpriseLinux.
• Create, deploy and manageLinuxand windows VM using Red Hat Enterprise Virtualization Manager, which includes moving and migrating VM from one cluster to another cluster or within the same cluster.
• Migration of applications from older Sun/Solaris hardware over to HP blade environment running RedHatLinux(RHEL4, 5, and 6. P2V migrations of hardware servers to VMware environment running on ESX V4.1 servers
• Expertise DevOps Support/Monitoring
• RedHat Linuxserver administrator, including security patching, kernel tuning, RAID disk array management, software packaging and installation using RPMs.
• Monitored ESX server alarms and VM's alarms and acted on those incidents to resolve.
• Taking Snapshots in the environment. Creating templates as per various business requirements.

Confidential, Bloomington, IL

Linux Administrator

Responsibilities:

• Installation, upgrade, configuration, troubleshooting, maintenance of (RHEL- 4.X, 5.X, 6.X and SUSE-10.X, 11.X). Maintained and administered 80+ blade servers, 100+ HP 585 server.
• Installed, Configured and administered Red Hat high availability cluster, load balancing cluster and Hadoop cluster.
• Wrote customized Kickstart scripts for each servers to install RHEL, SUSE, Oracle Linux servers (VMs).
• Upgrade and patched hardware drivers, existing software using the Red Hat Satellite server, yum, rpm, up2date tools.
• Installation, configuration of ESX/ESXi 4.X and 5.X servers. Applying security patches to the ESXi servers.
• Performed VMWARE ESXi host upgrade from old version to updated version environment. Perform Physical to Virtual (P2V) conversions and Virtual to Virtual (V2V) on servers utilizing VMware Converter.
• Troubleshoot system performance issues such as over memory and CPU usage by an application on different Linux distributions. Responsible for system log management, data backup using tar tool.
• Designed and implemented enterprise level infrastructure such as data center, servers, storage, backup, virtualization etc.
• Installation and administration of DNS, SMTP, Microsoft Exchange Server, NAS, Samba, Apache HTTP, HTTPS, NTP, NIS, SNMP, DHCP, NFS.
• Worked on homogeneous and cross-platform file sharing protocol such as FTP, Samba, NAS, and NFS for sending and receiving files between local and remote servers.
• Designed and implemented iSCSI storage based on the RHEL. Worked with MySQL, Oracle DB, IBM DB2. Installed, configured and managed
• WebLogic 10.X, JBoss 4.X, Tomcat 6.X and 7.x
• Part of a team which installed, maintained and configured Puppet, Chef based configuration management system.
• Servers and clusters performance monitoring using sar, top and iostat
• Documentation of installation, testing procedure before and after VM migration. Providing 24/7 on call technical support for the RHEL servers and VMWARE infrastructure.
• Performed volume management on newly assigned LUNs. User and group administration using the Microsoft Active Directory and Open LDAP.
• Administered DNS server. Updated forward and reverse lookup files for all the new machines added in the domain. Created reverse lookup files for the new subnets added into the network.

Confidential, Dallas, TX

Linux Administrator

Responsibilities:

• Installing, upgrading and configuring SUN Solaris 8, 9 and 10 on Sun Servers using Jumpstart and Linuxusing Kickstart installation and worked on upgrading and configuring SGI Servers.
• Installation and configuration of RedHat Linux and Windows NT servers.
• Installed and configured Patches and Packages.
• User account management and support.
• Handling troubleshooting issues like boating, RPM packages, User management and backup.
• IP bonding for load balancing and fail over, Firewall, SELINUX.
• Hosting and securing web pages using Apache web server and ssl.
• User Administration & Quota Management
• Log file was managed for troubleshooting and resolving errors.
• Responsible for reviewing all open tickets, resolve and close any existing tickets.
• Responsible for configuring real time backup of web servers.
• Involved in user account Administration.
• Performance Monitoring & System tuning.
• Involved in managing local disk devices
• Perform User Account management, data backups, and user’s logon support.
• Creation of VMs for SUSE and RedHat Linux on VMWare ESX 3.5 and administering them with VI Client.
• Configure hardware, peripherals, services, settings, directories, storage, etc. in accordance with standards and project/operational requirements.
• Creating volume groups, Logical volumes and extending them using LVM.
• Ability to organize team meetings to optimize work efficiency using Six-sigma principles and lean management

Confidential

Jr. Linux Administrator

Responsibilities:

• Installation, upgrade, configuration, and support RedHat operating system software
• Responsible for administering volumes and volume groups using LVM and Veritas Volume Manager
• Installation and administration of RHEL 4.0/5.0 and SUSE 10.x.
• Experience with running SQL queries on Oracle and MySQL
• System audit report like no. of logins, success & failures, running cron jobs
• Administration responsibilities include user, group, disk, and security management.
• Log management like monitoring and cleaning the old log files.
• Update DNS entries
• Upgrading memory, CPU, disk size on the existing VMS, ESX/ESXi sever. Created VM Machines for Test Environments to Test Applications.
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers
• Diagnose and correct boot failures arising from boot loader, module, and file system errors on Linux.
• Creating administer user accounts, SUDO access, etc.
• Assist storage team with load issues on Linux boxes.
• Able to lift up server racks weighing 50 pounds and work in tight spaces.
• Documentation of installation, testing procedure before and after VM migration.
• Providing 24/7 on call technical support for the RHEL servers and VMWARE infrastructure.