SUMMARY

• 6 years of experience in IT industry as Linux System/Network Administrator.
• Extensive experience in Linux / UNIX System Administration of Red Hat Linux 3, 4.0, 5.0, 6.0 (ES, AS & WS) and Sun Solaris 2.6 & 8, 9 &10 as well as Windows Server 2000, 2003 and 2008.
• Strong knowledge of Large - scale Linux Server deployment methods, Kernel compilation and configuration, performance monitoring and tuning.
• Hands on experience in various web servers like Apache, Tomcat, Jboss, Apache with Tomcat.
• Strong Server Build skills and building client/server services like NFS, NIS, DNS, DHCP, SMTP, POP3, HTTP/HTTPS, SSH, LDAP, LAMP, VNC, Samba, Sendmail, Postfix, Qmail etc.
• Experience EMC Symmetrix, CLARiiON CX300 Storage Arrays and Dell Equalogic storage.
• Extensive experience with Volume management software like Logical Volume Manger, Veritas Volume Manager, Solaris Volume Manager.
• Experience in Installation of Operating System, Packages and Patches, maintaining user accounts, System security maintenance, and backup recovery.
• Excellent experience in building and deploying Red Hat KickStart, PXE, and NFS Servers.
• Excellent Virtualization experience with VMware Technologies in an operational environment.
• Excellent Scripting Skills for scheduling services and for Backups.
• Hands on experience of IT automation software tools like PUPPET.
• Expertise in Configuring and troubleshooting various Networking, Hardware & Linux/ UNIX server’s services issues and performing preventive maintenance.
• Strong understanding of advance TCP/IP, UDP, IPv4, IPv4 Subnetting, IPv6
• Excellent experience on software and hardware firewalls, hardening OS security.
• Hands-on experience with Confidential, HP, SUN blade and rack servers.
• Excellent experience in low latency/high performance environment.
• Experienced with Oracle administration, performance tuning and troubleshooting issues.
• A quick learner with excellent problem-solving and interpersonal skills.
• Knowledge on migration projects and capacity management software.
• Experienced on supporting cloud based infrastructure including associated open source hypervisors (XEN, KVM, ESXI)
• Experience of working in Data centers with 24X7 Production and On-Call Environments.

TECHNICAL SKILLS

Operating Systems: Linux (RHEL, Centos, Ubuntu, SLES), HP-UX, Open Solaris, AIX, MS Windows Server 2000, 2003, 2008

Network Protocols: RIPv2, OSPF, BGP, EIGRP, Frame Relay, MPLS, IPv4 + IPv6, Advance TCP/IP, SIP, DNS, DHCP, LDAP, FTP, VPN, VTP (VLAN), SNMP, SMTP.

Programming Skills: VB, ASP, Java, GNU, C/C++.

Scripting Skills: Shell (BASH), PERL, RUBY, PYTHON.

Database: ORACLE, MS SQL Server, PostgreSQL, MYSQL.

Virtualization: VMWare.

Clusters: Conga, Red Hat Cluster, VCS.

Special: RHCSA, RHCE (System administration, Network administration and Security), CCNA, Sun Solaris, VMware vSphere, MS Windows Server 2003.

PROFESSIONAL EXPERIENCE:

Confidential, MN

Linux System Administrator

Environment: Red Hat Enterprise Linux 4/5/6, Centos, SVN, Jenkins, Puppet, Tivoli, MS Window 2003, HP UX, Confidential AIX

Responsibilities:

• Configured Kickstart files, installed RPMs, and Packages.
• Added servers to Active Directory and LDAP server.
• Worked with monitoring tool such as Nagios and Puppet.
• Deployed Puppet master to the server and cached the puppet agent into it.
• As a member of a group of Linux/Unix administrators, responsible for providing for 24x7 support for production and responding to users tickets created from Peregrine Ticketing Tool.
• Installed Linux (RHEL 5.5) on HP Blade and VMware ESX servers using RedHat tool Cobbler.
• Performed upgrade of RHEL 4.3 and RHEL5.3 to RHEL5.5.
• Installation and configuration of database servers e.g. Sybase, Oracle10g in RHEL.
• Created and managed Logical Volumes and File Systems using Veritas Volume Manager 5.0 on Solaris as well as Redhat and LVM on Redhat Linux.
• Installed, configured and supported Cluster filesystem using Veritas Cluster Server 5.0MP3RP2 environment for N+1 clustered environment for Application Servers.
• Manage Functional and Local users account.
• Supported proactive maintenance on systems by timely upgrading Patches to the systems and applications, Scheduling batch jobs and cron jobs.
• Wrote Bash and Perl scripts to perform backup and monitor/automate jobs.
• Involved heavily in Disaster Recovery testing.
• Working knowledge of RedHat Satellite Server
• Installed and configured Netbackup/Tivoli System Manager Tool on Linux/Unix servers to backup Filesystem on Operating System level.
• Installed and configured Tivoli Work Scheduler tool to manage batch jobs.
• Built Physical as well as Virtual (VMware ESXi) Servers on a fly.
• Responsible supporting KVM (Kernel based virtualization) based on hardware.
• Perform live migration from one host to another host.
• Handled problems or requests as per the ticket (Request Tracker) created.
• Built application specific servers (web-logic, apache, DB servers etc.) in large quantity as per EDC and Non EDC production requirement as well as App/Dev requirement.
• Patched RHEL5.3 servers during outage for PCI compliance purpose as well as VCS patching for Solaris servers during weekend outage.
• Upgraded Kernel for RHEL from EL5.3 to 5.4 during outage in production boxes.
• Decommissioned the old servers and kept a spreadsheet (inventory list) for tracking decommissioned and new servers.

Confidential, Bloomington, MN

Linux/VMWare Administrator

Environment: Red Hat Enterprise Linux 4/5/6, Sun Solaris 8/9/10, WebLogic, JIRA, MS Window 2003, HP UX

Responsibilities:

• Installed and maintained SVN, JIRA, Confluence server.
• Upgraded the system from IT automation software.
• Performed user group’s administration on Hadoop.
• Automate operation, installation and monitoring of Hadoop ecosystem components.
• Troubleshoot and debug Hadoop ecosystem run-time issues and troubleshooting common Hadoop cluster.
• Created and managed Logical Volumes and File Systems using Veritas Volume Manager 5.0 on Solaris as well as Redhat and LVM on Redhat Linux.
• Scanned Application and database servers on a regular basis using Symantec ESM tool to check for security holes that need to be fixed or patched.
• Migrated Non-standard production servers to Enterprise Data Center (EDC) minimum standard.
• Handled ILO (HP) and Vantage for console access to the servers.
• Verification of the built servers.
• Helped troubleshooting various networking and system related issues with LINUX server’s application and hardware.
• Handled various system monitoring activities like CPU loads, RAM loads, Ports monitoring, Disk Space monitoring, File Space monitoring.
• Maintaining troubleshooting documents. Used wiki-mapia for that.
• Worked with LVM to configure various volume groups, logical and physical partitions.
• Responsible for configuring and monitoring various day to day user management activities

Confidential, CA

Linux System Administrator

Environment: Red Hat Enterprise Linux 4/5/6, Sun Solaris 8/9/10, Veritas Cluster Server, Veritas Volume Manager, Oracle 9i, HP UX, Confidential AIX, WebLogic, Oracle RAC/ASM, MS Windows 2003 server.

Responsibilities:

• Primary responsibility includes building and supporting Red hat Linux 3, 4,5,6, Solaris, Windows servers for Enterprise P Management System project.
• Migrated the physical Linux/Windows Servers to virtual servers with all set of services configured.
• Migrated the manual jobs to self executing cron jobs on Physical/Virtual Servers.
• Worked on Storage Area Networks (SAN) of EMC Symmetrix, CLARiiON CX300 Storage Arrays and Dell Equalogic storage.
• Hands on experience with VMware virtualization converting physical servers in virtual.
• Automated the backup process to the disaster recovery centers using pub keys.
• Worked on building Linux systems for configuration of Data warehouse.
• Explore kernel modules and variants, tune kernel parameters, manage devices, and monitor processes and resources during configuration of ware house jobs.
• Configured dynamic and static network settings for IPv4 and filter packets, Review file system management concepts, removable media and configure NFS shares with autofs.
• Configuration and deployment of Nagios freeware monitoring system for managing all the Linux warehouse systems.
• Worked on Veritas Volume Manager and LVM to increase the storage capacity of the servers.
• Performed error analysis and recovery, documentation and procedures required for .
• Worked on Network configuration of Redhat servers and firewall configurations for the warehouse environment.
• Worked with Red Hat Package Manager (RPM), YUM and YAST.

Confidential, VA

Linux System Administrator

Environment: Red Hat Enterprise Linux 4/5, CentOS, Debian, Cisco, Veritas Cluster Server, Oracle 9i, MS Windows 98/2000/NT/XP, Oracle RAC/ASM, Porta-one soft switch, MS Windows Server 2003, 2008.

Responsibilities:

• Played an important role while migrating from Value based VOIP Route to Premium Route.
• Configured Root Disk Mirroring, Recovered Data from crashed servers, administered and managed Red Hat Linux, SLES, Solaris, HP-UX and AIX servers.
• Managed and upgraded UNIX’s server services such as Bind DNS, Postfix, Apache web server, Tomcat, MYSQL.
• Developed shell scripts to automate the system management functions and system backup.
• Performed installation of new software packages, patches and security updates and updated server’s firmware (BIOS) as when required and maintained server’s security from external attacks.
• Implemented central authentication system using NIS server.
• Worked with monitoring tools such as Hobbit, Nagios, Cacti, Xcat, MRTG and other monitoring tools.
• Performed user and group administration, UNIX tools installation and configuration.
• Worked with Veritas Cluster Suite, Veritas Net Backup (5.1) and Veritas Volume manager.
• Configured puppet and designed manifest to monitor client servers.
• Knowledge of cloud computing.
• Installed and configured VMWare ESX server on HP Blade servers.
• Responsible for troubleshooting various networking and system related issues with UNIX server’s application and hardware.
• Responsible for monitoring various servers’ performance ensuring security and stability with the help of available UNIX utilities.

Confidential

Linux System Administrator

Environment: Red Hat Linux 4.x/5.x, Solaris 8/9/10, Veritas Foundation Suite, HP UX, Confidential AIX, Veritas Cluster, Oracle ASM, WebSphere.

Responsibilities:

• Configured Kickstart files, installed RPMs, & Packages and wrote scripts for Opsware, Installing Patches.
• Created Users and NFS sharing & Samba sharing, EMC Agents Deployment on the Servers.
• Installed Oracle 9i on Linux, Created tablespaces & database structure as per client requirement. Worked closely with Oracle DBAs database configurations.
• Connected with Various pc of window XP/98 & installed Oracle 9i client on various node.
• Responsible for Monitoring Tools deployment and Script Development for any ongoing projects.
• Configured vsftpd, Telnet, Power term, FTP, sFTP, SSH, iptables, Samba for the servers.
• Created and maintained users, roles, permissions and enabled quota for the users.
• Data stored in cloud and worked with Redhat Satellite Server.
• Configured storage using Logical Volume Manager (LVM). Extending Volumes with LVM. Implemented RAID configuration for redundancy.
• Worked on Brocade SAN Switch and EMC Symmetrix on SAN and NAS respectively.
• Used LVM to configure volume group, logical and physical partitions and importing new physical volumes.
• Configure Backups using crontab, Updated Patches, Assigning Roles, RPM, LVM creation & extending.
• Fine tuning of systems using performance monitoring tools, i.e. a couple of servers need additional memory due to constant page in, page out, values are non-zeros (vmstat).
• Downloaded and installed MS SQL, Oracle 10g. Designed and created a database structure and provided user access to the database. Helped DBAs to tune database using OS level parameters like Semaphores and Shared memory Segments.
• Server Builds for VMware section and Normal Build of AS4 /AS3 /AS 2.1 EL 3 /4.