Summary:

• Over 7 years of experience as Linux Systems and Middleware Administrator which incorporates implementation, administration and Application-product support with expertise in RHEL 4, 5 and 6.
• Expertise in building Servers using Kick start for Linux.
• Expert in Installation, Configuration of Package and Patch Management.
• Expertise in configuration management and automation tool Puppet.
• Experience in Linux Environment Devops
• Expertise in writing code and automating Linux Administration tasks using Bash and Ksh.
• Expertise in configuring/tuning/upgrading and managing Web servers Apache, IBM HTTP, Nginx, Litespeed in heterogeneous environments.
• Expertise in configuring/tuning/upgrading and managing the middleware application servers JBOSS 4/5/6, Weblogic, Websphere and Tomcat
• Expertise in configuring and administering NIS, NFS, DNS, LDAP, SNMP and DHCP.
• Hands on experience in email server management Sendmail, Exim, Postfix, qmail .
• Excellent Logical Volume manager LVM experience in Linux.
• Installed, configured and managed Redhat Cluster Suite in Linux Servers.
• Performed configuration and managing Global File System GFS in Linux servers
• Experience in configuring Red Hat Network Satellite Server for automated installation of Linux boxes and also created image of Linux system with System Imager that automates Linux Installs.
• Experience in VMware. Installed and monitored Virtual environments with ESX/ESXi servers and VirtualCenter.
• Extensive experience in Linux Performance monitoring and kernel tuning and Load balancing.
• Good Experience in reviewing system log files for errors. Setting up CRON jobs for backups and monitoring process.
• Involved in large Data Center Migration planning, designing, moving servers to new data center, coordinating and troubleshooting issues for P2P, V2V and P2V environments.
• Good experience with administration of Zing and Azul java applications on JBOSS EAP 5/6.
• Have experience working in Solaris 8/9/10 , HP-UX and IBM AIX.
• Have good knowledge on Oracle 10g/11g, MYSQL and PGSQL databases.
• Implemented and enhanced UNIX shell scripts using Korn, Shell, Bash and Perl Scripting.
• Involved in Capacity planning, Performance analysis, Uptime Response time analysis.
• Extensive experience in Storage Multipathing and Bonding in Linux.
• Performed Planning and implementing Migrations on Linux servers.
• Extensive experience in configuring hardware and software RAID.
• Expertise in DRAC and ILO management.
• Solaris Live update Technology associated with an operating system upgrade or maintenance.
• Experience on configuring oracle real Application cluster RAC database, which provides highly available database solutions.
• Good experience in managing Siteminder policy server and webagents.
• Excellent experience in configuring and managing FTP and SFTP servers Proftpd, Vsftp, Pureftp
• Devise strategies for Disaster Recovery Management, including planning and designing servers for back up, recovery and archival of server / database information.
• Expertise in configuring and managing the monitoring tools Nagios, Cacti, mrtg .
• Excellent experience on configuring security tools IPtabless, Logwatch, Rkhunter, Chrootkit, Mod security and Mod evasive
• Respond to all UNIX systems and Middleware incidents 7 x 24 and resolving them on a timely basis. Ensuring high availability and stable operations of the UNIX infrastructure adhering to problem resolution, escalation procedures and notify management of problem areas and develop backup strategies and disaster recovery plans. Excellent Presentation, customer support and troubleshooting skills.

Technical Skills:

Operating systems: Red Hat Linux RHEL 3/4/5/6 , Centos, Fedora, Solaris 10/9/8, HP-UX, IBM AIX.

Server Hardware: G11 Dell PowerEdge, rack type R415, R610 and C series, CICO UCS.

Cluster: Redhat cluster, Veritas Cluster, VMware ESX Technologies.

Web Servers: Apache HTTP Server, IBM HTTP Web Server 7/8.x, Oracle Http Server10g/11g, Nginx

Application Server: JBOSS 4/5/6, Tomcat 4/5/6, WebSphere 8, Weblogic 11/12.

Scripting: Shell scripting Ksh Bash Shell , Perl and php.

Configuration Management Tool: Puppet

Networking Services: NIS, NFS, AutoFS, DNS, SNMP and Dhcp

Virtualization Products: VMware, Xen, OpenVZ.

Tools: CA Siteminder, Identity Minder

Professional Experience:

Confidential

Sr. Linux Systems and Middleware Administrator

Responsibilities:

• Installing Configuration and maintenance of Redhat Linux 5.X/6.X.
• Worked on configurations and installations Linux servers using Kick start.
• Good working experience with RedHat Satellite Server for upgrading and patching Linux Servers.
• RPM Package administration using RPM Build, installing packages, restore corrupted RPM data base.
• Installed, Configured and maintenance of DNS servers, DHCP Servers, Mail Servers, FTP servers, NIS, Samba and web servers.
• Implementing RAID 0, 1, 5 and 0 1 levels.
• Installed and configured RedHat Cluster with GFS2 file systems. Managed the ext3 and ext4 file systems using Logical Volume Manager LVM .
• Performed Administration task like Setup, maintains and manage User accounts and Groups, allocating quotas to users as well as system startup and shutdown.
• Extensive knowledge on SAN and NAS storage configuration in Linux.
• Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using RedHat Cluster Server in Linux.
• Performing core dump and log analysis to find root cause for the system or application unavailability.
• Maintained virtual environments using VMware ESX 4.x Server and built various Linux servers on VMware servers.
• Created Scripts for automating day to day Unix admin tasks like Post server setup, Server hardening, Patching on multiple servers etc
• Focused on automation, integration, monitoring and configuration management.
• Deployed Puppet for configuration management to the existing infrastructure.
• Created Puppet modules to install, configure, manage the applications and services like JBOSS, Apache, Nagios etc.
• Wrote Puppet manifests and automated various day to day tasks like user management, monitoring, package installations, service and path upgrades, configuration file managements etc.
• Administer, maintain and troubleshoot SAN Luns using native multipath and Powerpath utilities.
• Providing online support for Linux servers in a Data Center Production Environment
• Involved in large data center migration planning, designing, moving servers to new data center, coordinating and troubleshooting issues with various data center, network, application and storage teams
• Installation, Configuration, and administration JBOSS 4.x/5.x/6.x and related components on Linux RHEL 4.x,5.x,6.x and Solaris 8/9/10 .
• Installation, Configuration and Administration of Web Logic and Websphere in Linux and Solaris Servers.
• Configuring Zing and Azul java application on JBOSS 5/6.
• Installation and configuration of Apache HTTP server Plugin to proxy requests from Apache to JBOSS and Websphere on Linux servers.
• Configured and set up Secure Sockets Layers SSL for data encryption and client authentication and working experience with BIG IP F5 Load Balancer.
• Managed and Monitored JVM Performance by adjusting heap size and garbage collection parameters for JBOSS and Webpshere applications.
• Dealt with troubleshooting issues like Out of Memory, High CPU and Server Hang using Thread Dump, Heap Dump and Garbage collection analysis.
• Configuring Siteminder Webagents and managing the siteminder policy servers.
• Provisioning servers for Oracle, Mysql and Sybase databases.
• Supporting critical applications and proprietary development environments.
• Monitored services such as Disk Space, CPU usage, Memory usage, Temperature of the equipment, HTTP, Mail, SSH etc.
• Troubleshooting network, application, and server related issues.
• Configuring Avamar and Netbackup backup agents on Linux, Solaris, HP-UX and Aix servers.
• Maintaining ServiceNow environments used for the ticketing system.
• 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.
• Involved in mass migration of data form old EMC Storage subsystems to new Subsystems.

Environment: Linux RHEL4/5/6, Centos 4/5, Fedora 9/10, Solaris 8/9/10, HP-UX 11, AIX 5/6, 10G, 11G Dell PowerEdge Models, Cisco C series, Cisco UCS, Redhat Cluster, GFS2, LVM, Veritas File System, Veritas Cluster Server, Shell Scripting Korne Bourne , Puppet, Perl, Sendmail Protocol, Apache, JBOSS, Websphere, Weblogic Server , Superdome blade servers, Avamar, SAN / EMC.

Confidential

Linux Systems and Web Administrator

Responsibilities:

• Installation, Configuration Upgrade of Linux Redhat 4/5 and Centos 4/5 operating systems.
• Configuring RedHat Linux Servers with kick start.
• Configured and troubleshooting NFS, NIS, DNS, DHCP, FTP, LDAP, and Samba servers in Linux Servers.
• Worked on disk and file system management using Logical Volume Manager LVM .
• Worked on performance tuning in Linux and Centos.
• Performed package and patching management and debugging on all flavors of Unix /Linux
• Expertise in capacity planning and migrations from Solaris to Linux.
• Installed Apache 1.3,2.0,2.x
• Performed documentation of architectural design and build engineering Documents and SOWs
• Performed Memory and Swap management to improve optimization and performance of the servers.
• Experienced in User and Group administration and security issues.
• Performed upgrades of Packages and Patches in Linux.
• Monitoring the physical performance of servers and identifying the root cause of a disaster using DRAC, ILO, IPMI-SOL, IPMI-KVM.
• Involved in large Data Center Migration planning, designing, moving servers to new data center, coordinating and troubleshooting issues for P2P, V2V and P2V environments.
• Installing and managing JBOSS and Tomcat instances.
• Installed, configured and managed Oracle Real Application Cluster RAC Linux Servers.
• Creation and scheduling Cron Jobs such as for Backup, System Monitoring and removal of unnecessary files.
• Providing day-to-day user administration like adding/deleting users and managing user queries.
• Planned and implemented Migrations from one environment to another environment in OS level in Linux servers.
• Expertise on live OS upgrades in Linux.
• Expertise in performing Kernel Recompilation, Manual Kernel upgrade, Kernel upgrade using Redhat Satellite server, Kernel upgrade without downtime using ksplice .
• Worked on installation, Configuration and manage RedHat Cluster Suite in Linux Servers.
• Installed, Configured and managed Global File System GFS in Linux Servers, Creating and managing Cluster suite using GFS.
• Performed installation, configuration, upgrades, Package administration and support for Linux systems on client side using RedHat satellite Network server.
• Performed RPM Package Administration using RPM build.
• Performing File System Consistency Check and password reset using Rescue Kernels and IPMI.
• Regular disk management like adding and replacing hard drives in existing servers and workstations. Creating partitions according to requirements, creating new file system or growing existing one over the hard drives and managing the file system.
• Worked on SAN, NAS and different level of hardware and software RAID configuration.
• Worked on VMware. Installed and monitored with various virtual environments with ESX 3.x.
• Configured Ethernet network bonding in Linux.
• Backup and restore using the third party tools like Evault and CDP R1Soft Continuous Data Protection .

Environment: RedHat Linux 4/5, Centos 4/5, Fedora, Debian, SUSE, Apache, JBOSS, Tomcat, VMware ESX, DELL PowerEdge. IDRAC, ILO, Exim, Sendmail. Qmail.,

Confidential

Linux Systems Administrator

Responsibilities:

• Heading the shift in Providing Level3 remote infrastructure management and technical support services for UNIX/Linux servers.
• Configured and installed RedHat Linux Servers using kick start.
• Server auditing and Performance Tuning.
• Installed and configured HA clusters using heartbeat and DRBD on Linux Servers.
• Performed configuration and troubleshooting of services like NFS, NIS, DHCP, FTP, LDAP, Web servers, Samba server, Apache server.
• Installing and managing JBOSS instances.
• New Server setup for Web Hosting requirement including installation of hosting control panel, security monitoring, Installation of security software such as APF, BFD, Chkrootkit and Rkhunter
• Performing Server hardening and security Audits for the external facing servers to pass the PCI compliance, Tracing and mitigating DDOS attacks, preventing spamming and hacking attempts.
• Identifying the week passwords using the tool like John the Ripper.
• Implementing file sharing on the network by configuring NFS on the system to share essential resources.
• Configuring File systems using ext2 and ext3 file system. Converting ext2 file systems to ext3 filesystems.
• Resizing ext3 filesystem using LVM without downtime.
• Configuring Load balanced software and hardware web servers Apache, Nginx, Litespeed .
• Worked on Linux, Apache, Mysql and php performance tuning.
• Configured mysql database server replication master-master and master-slave
• Performed package and patching management and debugging in all flavors of Unix and Linux.
• Expertise in capacity planning and migrations in Linux.
• Disaster recovery management. Recovering the data from corrupt disk using the data rescue tools like ddrescue.
• Well knowledge in documentation of architectural design and build engineering Documents and SOWs.
• Troubleshooting and analysis of hardware and failures for Linux servers Core dump and log file analysis .
• File system and disk management using LVM and RAID.
• Automating the backup of mysql databases and psql databases using developing custom shell scripts.
• Patch and Package administration for installation of patches as per company policy and installation of packaged application.
• Performing File System Consistency Check and password reset using Rescue Kernels and IPMI.
• RPM package administration using RPM Build.
• User Group administration and advanced file permissions.
• Analyzed and troubleshoots bottlenecks involving Memory, CPU, Devices and Network using ps, Vmstat, iostat, netstat, snoop and nfs command, tuning the performance and optimization of servers.
• Responsible for setting up a disaster recovery plan for the servers, which includes in development of programs for synchronized backups.
• Worked on installing and configuring OpenVZ and XEN virtualizations.
• Performed documentation of architectural design and build engineering Documents and SOWs.
• Configured and maintained Network Bonding in Linux.

Environment : RedHat Linux 4/5, Centos 4/5, Fedora, Debian, SUSE, Apache, JBOSS, Tomcat, Vmware, Amazon EC2, KVM, IDRAC, ILO, Exim, Sendmail. Qmail, Webhosting Control Panel cPanel, Exim, Plesk , JBOSS.