Summary:

• 7 years of specialized experience in System Administration, Network Administration and Application Support working on RedHat Linux 4.x/5.x, Sun Solaris 8.x/9.x/10.x, IBM AIX 4.x/5.x/6.1, SUSE Linux 10 and HP-UX 11.x environments.
• Experience in installation, configuration, backup, recovery, maintenance, and support of RedHat Linux and Sun Solaris.
• Extensively worked on tools like Veritas Volume Manager vxvm and Veritas file System.
• Good experience in setting up of RAID0, RAID1 mirroring and RAID5 for data redundancy using Veritas Volume Manager and Veritas File System on Sun Solaris.
• Core expertise with Sun Cluster and Sun Volume Manager maintenance and troubleshooting.
• Strong knowledge in Weblogic 5.1/ 6.1/7.0/8.1/9.1/9.2 Application Server and very good experience in Weblogic 6.1/7.0/8.1/9.1/9.2 Clusters.
• Proficient in deploying applications in WAR, JAR, and EAR formats and strong working knowledge of WebSphere 6.x/7.x Administration Portals/Process Severs.
• Worked on OS migrations, upgrade and BIOS and NIC firmware upgrades.
• Configuration and administration of Fiber card Adapter's and handling of SAN SAN arrays, HITACHI, EMC .
• Installation and upgradation of Packages and Patches configuration mgmt, version control, service pack reviewing connectivity issue regarding security problem.
• Implemented day-to-day tasks in RedHat Linux and Sun Solaris include upgrading packages, kernel, and drivers.
• Configure multipathing for SAN Disks in Hitachi HDLM, EMC Powerpath and AIX MPIO.
• Experience in Creation and managing user accounts, security, rights, disk space and process monitoring in RedHat Linux and Solaris.
• Experience in configuration of NIS, NIS , LDAP, DNS, DHCP, NFS, LDAP, Automount, Sendmail, FTP, remote access, Active Directory, Security management and Security trouble shooting skills.
• Experience in writing shell scripts to automate the administrative tasks and management using cron and at.
• Experience on webservers such as Tomcat 5.x/4.x/3.x Apache Server 2.x/1.x.
• Experience in Installation of Oracle, MS SQLServer and MYSQL.
• Worked with Database administrators to tune kernel for Oracle installations on RedHat Linux and Solaris Servers.
• Experience in VMware ESX Server to build guest OS using cloning.
• Core expertise with, Sun Cluster and Sun Volume Manager maintenance and troubleshooting.
• Analyze, troubleshooting, and resolve RedHat Linux and Server HW, Network problems in a Production Server environment.
• Wrote system design, implementation plans, and updated documentation in share drive.
• Experience working with production and 24 x 7 on call environments.
• Good team player, strong interpersonal and communication skills combined with self-motivation, initiative and the ability to think outside the box.
• Scripting done in korn, bash,csh and perl for automated tasks.
• Managed Patches, Upgrades and Licensed Products for System software on all flavors of UNIX and Linux Servers.
• Extensive experience in Databases, Clustering, SSLVPN, Firewalls and Cross platform tools like Samba.

Technical Skill Set:

Professional Experience:

Confidential

Role: Linux System Administrator

Responsibilities:

• Installed, Configured and Maintained Debian/RedHat Servers at multiple Data Centers.
• Configured RedHat Kickstart server for installing multiple production servers.
• Configuration and administration of DNS, LDAP, NFS, NIS, NIS and Sendmail on RedHat Linux/Debian Servers.
• Hands on experience working with production servers at multiple data centers.
• Involved in writing scripts to migrate consumer data from one production server to another production server over the network with the help of Bash and Perl scripting.
• Installed and configured monitoring tools munin and nagios for monitoring the network bandwidth and the hard drives status.
• Automated tasks using shell scripting for doing diagnostics on failed disk drives.
• Logged events from forced crash dumps and troubleshooting server issues.
• Troubleshooting production servers with IPMI tool to connect over SOL.
• Configured system imaging tools Clonezilla and System Imager for data center migration.
• Configured yum repository server for installing packages from a centralized server.
• Installed Fuse to mount the keys on every Production server for password-less authentication on Debian servers.
• Installed and configured DCHP server to give IP leases to production servers.
• Management of RedHat HP
• User accounts, groups, directories and file permissions.
• Implemented the Clustering Topology that meets High Availability and Failover requirement for performance and functionality.
• Configured, managed ESX VM's with virtual center and VI client.
• Performance monitoring using Sar, Iostat, VMstat and MPstat on servers and also logged to munin monitoring tool for graphical view.
• Performed Kernel tuning with the sysctl and installed packages with yum and rpm.
• Installed and configured PostgresSQL database on RedHat/Debian Servers.
• Performed Disk management with the help of LVM Logical Volume Manager .
• Configuration and Administration of Apache Web Server and SSL.
• Installed open-ssl and generated self-signed keys for internal use.
• Password-less setup and agent-forwarding done for SSH login using ssh-keygen tool.
• Established and maintained network users, user environment, directories, and security.
• Documented strongly the steps involved for data migration on production servers and also testing procedures before the migration.
• Provided 24/7 on call support on Linux Production Servers. Responsible for maintaining security on RedHat Linux.

Environment: Sun Fire 250 and 450 Series, IBM blade servers, Websphere 5.x/6.x, Apache 1.2/1.3/2.x, iPlanet, Oracle 11g/10g/9i, Logical Volume Manager, Veritas netbackup 5.x/6.0/6.5 SAN Multipathing MPIO, HDLM, Powerpath , VM ESX 4.x/3.x/2.x, RHEL 5.x/4.x and Windows 2003/NT.

Confidential

Role: Linux System Administrator

Responsibilities:

• Staged and Maintained UNIX/RedHat Linux Solaris 8/9/10, RedHat Enterprise Linux on Sun Enterprise servers, Sun Ultra Sparc servers and IBM blade servers.
• Installed and Configured RedHat Linux Kickstart and Solaris jumpstart Servers.
• Installed and Configured OpenVMS for testing and production servers.
• Administered disk groups, subdisks, plexes, and volumes using Veritas volume manager
• Installing hardware, Sun 3rd party software and latest OS and patches to keep the latest and most up to date software configurations.
• Experienced with ZFS file system on Solaris 10. Implemented ZFS and mount for non global zones for a specific application.
• Configuration of Logical Domains LDOMS on Sun Solaris 10.
• Involved in OS Upgradation project for patching Linux and SUN servers to latest versions.
• Installed/Configured Websphere 5.x/6.x and other Application Servers.
• Administration of Websphere Application Server 6.x with Network Deployment, and Extension Deployment, on RedHat Linux.
• Installation and configuration of Oracle RAC 11g on RedHat Linux cluster nodes.
• Worked with Oracle Database Administrators and reviewed the required maintenance tasks.
• Installed RPM packages on RedHat Linux Servers, updated with the help of yum and up2date.
• Managed builds and Deployments, Created Ant Scripts to customize EAR, WAR and JAR files and the application is deployed on WebSphere server.
• Management of RedHat Linux and Solaris user accounts, groups, directories and file permissions.
• Configuration of DHCP Server on Linux to get the IP Addresses Dynamically.
• Configuration and administration of DNS, LDAP, NFS, NIS, NIS and Sendmail in RedHat Linux and Sun Solaris.
• Configuration and Maintenance of AutoFs in Linux and Sun Solaris.
• Configured SAMBA to get access of Linux shared resources from Windows.
• Day to day Linux and Solaris server hardware support, problem and change ticket implementations, composing scripts, OS builds upgrades along with day-to-day Storage UNIX Administration.
• Tested and implemented Root disk mirroring.
• Solaris Performance Monitoring and Tuning using iostat, vmstat and netstat.
• Configuration and Administration of Apache Web Server and SSL.
• Creating and managing VM's through Virtual Centre and VI client.
• Responsible for Monitoring and fine tuning system and network performance for Linux systems.
• Installed Configured EMC disk devices in Linux servers.
• System Backup using tar, cpio for local systems and Veritas Netbackup for enterprise wide backup and recovery.
• Documenting each step and testing procedures before the migration.
• Provided 24/7 on call support on UNIX Production Servers. Responsible for maintaining UNIX security on RedHat Linux and Sun Solaris.

Environment: Sun Fire 250 and 450 Series, IBM blade servers, Websphere 5.x/6.x, Apache 1.2/1.3/2.x, iPlanet, Oracle 11g/10g/9i, Logical Volume Manager, Veritas netbackup 5.x/6.0, SAN Multipathing MPIO, HDLM, Powerpath , OpenVMS 7.x/8.x, VM ESX 3.x/2.x, RHEL 5.x/4.x and Windows 2003/NT.

Confidential

Role: Linux/UNIX Administrator

Responsibilities:

• Installed, upgraded, Mirrored and configured RHEL 4.x and Sun Solaris 9.0/8.0 using Kickstart, Jumpstart Installation respectively.
• Upgraded Solaris 8 to 9 on Sun servers and workstations. Added necessary patches using patchadd utility.
• Controlled disk operations, disk group operations, volume operations and volume configurations using vxdisk, vxdg, vxassist, vxmake and vxvol in Veritas Volume Manager.
• Configured Printers, Print Server and Print Clients using commands like lp, lpstat, lpadmin, lpfilter GUI.
• Configured and administered Samba to provide file services, resolved various inter-operability issues between Windows NT Solaris platforms
• Installation, Setup and Configuration of WebLogic 9.0/8.1 application server.
• Deployed Portlets manually using Admin Console.
• Disk Management using different RIAD technologies in Solaris and Linux using Veritas Volume Manager and LVM.
• Veritas Cluster Installation and Configuration along with Resources and Service Groups Configuration in VCS.
• Configuration and administration of DNS, LDAP, NFS, NIS and Samba in RedHat Linux, and Sun Solaris.
• Network trouble shooting using ndd, traceroute, netstat, ifconfig and snoop.
• Administered and Managed Network Applications and Services like NFS with Hummingbird connectivity V7.1.
• Involved in Configuring DHCP server and giving IP addressing dynamically.
• FTP Server configuration in Linux and done kernel tuning on Linux for play out software.
• Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software and directories files using access modes.
• Written Shell scripts to run Batch Jobs on Sun Solaris and RedHat Linux servers.
• Provided system performance reporting on a regular basis along with keeping all software at current version levels, and maintaining a log of changes for tracking.

Environment: IBM RS/6000, IBM PSeries, Pentium PCs, Linux Servers, Veritas volume manager 3.5/4.x, Websphere 5.x/6.x, Jboss 4.0, Sun Disk Suite, Veritas Net Backup 5.x/6.0, Sun Cluster in SAN environment, vbscript, pearl, Oracle 9i, HP-UX, RedHat Linux 3.x/4.x/5.x, Solaris 9.0/8.0, Windows 2003/2000.

Confidential

Role: Linux/Unix System Administrator

Responsibilities:

• Installation, Upgradation and configuration of RedHat Linux and Windows 2000 servers.
• Installed and Configured WebLogic 6.0/7.1 Application Server.
• Deployed latest patches for, Linux and Application servers, performed RedHat Linux Kernel Tuning.
• Upgraded BEA WebLogic 7.0/6.1 server with latest service pack patches to 8.1.
• Implementation of Samba to help printing and file sharing in the mixed Environment
• Installing and setting up Oracle8i on Linux for the development team
• Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software and directories files.
• Developed Korn and Bash shell-scripts to automate routine activities
• Migrated database applications from Windows 2000 Server to Linux server
• Configuring Windows Machines in Work Group Environment
• Create system images with Norton ghost.
• Performance Monitoring System tuning.
• Managed Virtual Memory and swap space on RedHat Linux Servers.
• Configuration of DNS, APACHE, MAIL, DHCP FTP Servers in RedHat Linux 3.x/4.x.
• Written Shell scripts to run Batch Jobs using cron and at.
• Implementing Raid levels and changing Boot PROM values according to the requirement.
• Configuring modems printers.
• Documenting the configurations, changes made on any part of System and Network.
• Involved in Backup of data on DAT tape drive, security, performance and availability of system and network.
• Provided support by 24x7 shift rotation basis and pager support
• Monitored trouble ticket queue to attend user and system calls, attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.

Environment: RedHat Linux 3.x/4.x, Windows 2000/NT 4.0, Apache 1.3.x, 1.2, 2.x, IIS 4.0 and Oracle 8i, bash/ksh shell, Samba, DNS, APACHE, MAIL, DHCP FTP.