SUMMARY

• Over 8 years of IT experience specialized in UNIX System Administration working on server - based operating system; kernel configurations on Redhat Linux, CentOS, SUSE, Debian 7, Ubuntu 12.x/13.x and Solaris 8,9 (32 bit & 64bit) Networking, kernel Parameter & Tuning, Trouble Shooting System & Performance Issues, Package Management and Patch Management.
• Extensive experience in installation, configuration and administration of Solaris 2.x,7,8,9,10, Redhat 7.3,8,9,IBM AIX 4.3,5L.
• Support and maintenance of Sun Ultra Enterprise Servers (E3500, E4500, E450, E420R, E250), Sun Fire (6800, 4800, 3800, V880, V4xx, V2xx,).
• Experience in Installation, Configuration, Implementation, Upgradation, Maintenance & Troubleshooting of Weblogic and Apache Server.
• Experience in implementation and maintenance of VMware, DNS, DHCP, NIS, NFS and SMTP.
• Proficient in handling Hardware issues, Migration and Data Center Operations.
• Proficient in Linux Utilities: KICKSTART, SSH, FTP, AUTOFS, Quota Management, wrappers, User Management, Process Management, Memory Management, and Text processing tools, Log Management, Package Management, Disk Management and Swap Partition/Files Management.
• Proficient with mail technologies such as SMTP/ICMP/POP3/send mail/mailx. Proficient in writing Shell scripts to automate business process.
• Experience in Installing, configuring and maintaining apache/tomcat, samba & send mail, Web Sphere Application Servers.
• Expertise in VMware Virtualization solutions, VM Migration & Cloning.
• Experience working with LDAP/Kerberos authentication and Access Management control in mixed environments using tools like VAS.
• Experience in Installation, Configuration, Implementation, Upgradation, Maintenance Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• Expertise in file system concepts like LVM, SVM, VxVM. Creating new file systems, increasing and decreasing file systems, mounting file systems, unmounting file systems and troubleshooting Disk space issues.
• Efficiency in installing, configuring and implementing the RAID Technologies using various tools like VxVM and SVM.
• Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using Confidential Cluster Server 4.x, 5.x.
• Familiar in LDAP setup and Administration.
• Configured Networking Concepts DNS, NIS, NFS and DHCP, troubleshooting network problems such as TCP/IP, providing support for users in solving their problems.
• Good presentation, customer support and trouble shooting skills & experience in providing 24x7 supports.

PROFESSIONAL EXPERIENCE

Sr Linux/ Unix Admin

Confidential, Lakewood, CO

Responsibilities:

• Provided 24 x7 on-call supports in debugging and fixing issues related to Linux, Solaris, HP-UX
• Installation/Maintenance of Hardware/Software in Production, Development & Test Environment as an integral part of the Unix/Linux (RHEL/SUSE/SOLARIS/HP-UX/AIX) Support team.
• Installed/Configured/Maintained/Administrated the network servers DNS, NIS, NFS, SENDMAIL
• Involved in Adding new disks, formatting, partitioning, disk space allocation, monitoring system performance, system tuning, server hardening and crash recovery issues.
• Implemented security in systems and network for all Sun Enterprise Servers & Desktop Servers
• Implemented the skills of Load balancing for edge components using F5’s BigIP load sprayer.
• Installed and configured Solaris 10 servers with Zones and containers on SUN M5000 and T2000 Servers with SUN ZFS.
• Implemented SUDO, SSH and other security tools
• Administered file system and volumes using Confidential Storage Foundation, Solaris Volume Manager on Solaris and Logical Volume Manger on Linux.
• Installed and Configured Confidential Volume Manager for Development, Test and Production environments.
• Key participant in implementation and integration of three new data centers including physical, logical and application level testing and support and developed and executed test plans for Confidential Cluster with Netapp SAN.
• Installed and configured RedHat Satellite server for package transfer across servers, to store client’s system profile and to control other servers in the network.
• Package management like Install, remove and update and querying packages using RPM tool..
• Maintained Load balancing, High availability, Failover functionality and Disaster recovery included changing IP address of the web and app server machines, which caused change in the virtual host and http transport configurations.
• Monitoring of space availability on each file system using the Shell Scripts.
• Monitored the performance of the system using ps, prstat, vmstat, mpstat, perfmeter and iostat to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.
• LVM Configuration and Management.
• Worked in environment containing Solaris zones/containers and involved extensively in trouble shooting the issues by finding out root causes, analyzing core dumps and resolved system crashes.
• Supporting servers with Oracle 10g and MySQL Databases, coordinating with DBA’s for Kernel Tuning and performance monitoring.
• Responsible for configuring Postfix mail relays with Mail Exchangers, Bind DNS Server and clients, SNMP v3 and NTP relays.
• Responsible for installing, configuring, maintaining, upgrading and troubleshooting EMC powerpath on Solaris 10 and Linux.

Environment: Linux (RHEL 4.x &5.x), SUSE 11/10, Solaris 10, AIX 6.1, Oracle 11/10g, SUN Servers, SUN Fires, Samba, Perl, Shell Scripting, Bash, Confidential Volume Manager (VVM), F5 Load balancers, SiteMinder5.5/4.5, EMC Storage SAN, Confidential Cluster Server (VCS).

Sr Linux/ Unix Admin

Confidential, HOUSTON, TX

Responsibilities:

• Performed Building up of servers, deployment activities, and environment support including installation, configuration diagnostics, planning and upgrades.
• Configured 4 Node oracle and 6 Node Mysql Redhat Cluster on Redhat EL 5
• Responsible for design and implementation of IT infrastructure such as data center, servers, storage, backup, and virtualization.
• Support for Linux/Unix systems administration, operational support and problem resolution for server systems
• Created shared NFS files system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting &Stopping the NFS services.
• Responsible for Installation, configuration, Maintenance, Deployments, Update,, Monitoring, performance tuning on Linux.
• Experienced in monitoring and debug performance issues on different OS Linux (RHEL & Centos),
• Systems log management, Data backup and restoration with UNIX native tools (tar/dd).
• Managed 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.
• Created Storage Group, Zones, volume groups, and different RAID’s using EMC Utility and responsible for backup and recovery using NetApps Snapshot.
• Repaired bad spots on the disk using repair and analyze. Used format and fdisk/Parted for disk configuration and disk crash recovery.
• Design and Deploy In house (Private Cloud) using eucalyptus and Openstack on Centos and Ubuntu OS
• Installed and maintain puppet-based configuration management system
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure.
• Deployed mcollective for orchestration.
• Using Puppet configuration management to manage site on EC2 Amazon, Rackspace public cloud.
• Configure of Caching technologies like Aicache internally, and Akamai externally for better site performance.
• Configure and managing LVM on Linux using tools like lvextend, lvcreate, resize2fs etc
• Performed daily housekeeping functions, such as establishing new accounts, creating and resetting passwords, developing, scripts, performing system backups and recovery, and installing software patches and updates.
• Developed Cron jobs and Shell Scripts (Shell, Python) for automating administration tasks like file system management, process management, backup and restore.
• Wrote Python and Shell scripts to monitor installed enterprise applications and to get information from the logs and database in the required format and other daily activities and jobs.
• Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, FTP, TCP/IP, ARP, Applications and print servers to insure optimal networking and printing functionality.
• Worked on FTP servers for sending and receiving files between local and remote servers.
• Configured Open source tools like Nagios, Cacti, OSSEC, Zabbix, Centreon for Monitoring
• Providing 24*7 on-call support on rotation basis and Handling High priority incidents through bridge calls.

Environment: Linux (RHEL 4.x &5.x), Sun Solaris 11/10/9/8/7, CentOS (5.x & 6.x), Ubuntu, Oracle 11/10g, HP Servers, HP SIM, Cacti, Zabbix, OSSEC, Centreon/Nagios Monitoring, Apache, Tomcat, Python, Shell Scripting, Bash, RedHat Cluster, F5 Load balancers, Net Apps, LDAP, EMC Storage SAN.

Linux Administrator

Confidential, Nashua, NH

Responsibilities:

• Responsible for supporting Linux System Administrator customers with RHEL/CentOS/Ubuntu operating systems questions and problems via telephone, FAX, and email.
• Researched the data base for known problems or tested the customers’ problem on a test system in the same environment.
• Aided customer in resolving their problem using the tools in the Linux OS or from the command line.
• Provisioning and support of Production, QA and Developers environment.
• Deployment and Build of various environments.
• Overall responsibilities include checking the health of servers, updates and backup. Check with the trouble ticketing system for any unread ticket.
• Also troubleshooting if there any bottlenecks; Responsible to perform BIOS update on Dell Systems.
• Handled all system administration duties for all Red Hat Linux and VM Servers on site.
• Responsibilities ranged from daily tasks to more advanced ones such as shell scripting, software installation and system/network troubleshooting.
• Responsible for the Server Administration tasks in the web & server support areas.
• Confidential Volume Manager and Confidential File System troubleshooting and Administration.
• Mutli-tier application environment with Weblogic, WebSphere. Mission Critical 24x7 Servers support.
• Configuration and Installation of JBOSS 4.x on Linux servers.
• Installed and configured JMX-based services on JBOSS.
• Define Mapping Servlets, Filters, and Session Configuration on JBOSS.
• Configured JNDI and JMS on JBOSS.
• NIS, NFS, AUTOFS, NTP Configuration and Administration.
• Analyze and suggest corrective methods on performance issues.
• Adding additional and extension of existing File systems using VxVM and Vxfs. Configuring autofs for auotomount.
• Upgrading the Application as per Application team requirements. Scheduling jobs using crontab and at.
• Done with LAMP Setup in Ubuntu, MySQL setup, Performance Tuning, Replication, Commands, Backup and overall Administration.
• Tuned servers for maximum efficiency for Oracle and MySQL Data Bases.
• Performed workstation and server installations and upgrades, standardized workstation configuration, automounter, sendmail, and hardware upgrades; administration support and troubleshooting.

Environment: Redhat Linux 3,4,5,6 Sun Solaris 8,9,10, JBOSS AS 4.x,Sun V440,V 20 T5240 Sparc stations 20,Switches, VMware ESX 5.1,oracle 11, Confidential Cluster Server 5, Confidential Operations Manager.

Linux System Administrator

Confidential, Philadelphia, PA

Responsibilities:

• As an Open System Administrator my duties included supporting Linux System Administrator customers with RHEL/SUSE a combination of systems architecture, systems development, Unix/Linux operating system lifecycle development, technical assessments, implementation administration, regression process development, SAN support from a directory standpoint, technology scaling, server builds, migration and/or transition planning, project planning, standards validation/development, technical documentation, presentation to management, training and mentoring of more junior staff and troubleshooting and problem resolution.
• To provide ongoing support in systems management and administration of LINUX/UNIX in global-scale environment.
• Provisioning and support of Production, QA and Developers environment.
• Deployment of UNIX /Linux, Confidential and Build of various environments.
• Provide rotational on-call Tier III support responsibilities. Production Support: Provided 24x7 supports for various divisions within the Company and resolve all production issues in a high pressure and time sensitive environment.
• Issues related to NFS, NIS, LVM, Grub corruption, configuration & maintenance of RAID (level 0,1,5), troubleshooting Confidential Volume Management and cluster server environment.
• Developing scripts in PERL and SHELL to automate the process.
• Disaster Recovery and Change Management: Designed and implemented disaster recovery solutions such as clusters using Confidential Cluster server for storage replication and to allow seamless failover of IP on the DR site.
• Weekly meeting to discuss change management, datacenter and infrastructure approvals/issues.
• This includes setting up global standards for various customized images for Linux and Solaris, hardware standard (Sun and HP) and storage presentations and initialization.
• Engineered and managed process flows and event management as per business requirements.
• Production Support & Systems engineering duties related to Redhat system administration DNS, DHCP, NFS, NIS, LDAP, user account maintenance, backup & recovery, Auto-mounting, Licence Management, Printer configuration.
• Client interaction for requirement gathering, so as to design and plan the software and hardware infrastructure; Handled installation and configuration of SQUID Web proxy.
• Installed, configured Oracle 10g & MySQL databases for Dev, Prod & QA environments.
• Managed e-mail systems, including POP, SMTP, text, and web-based clients, as well as virus scanning/filtering software; Installed, configured and managed DNS service for several domains; Performed OS installations and configuration for testing and implementing server environment based on virtualization.
• Installed and maintained web servers Jakarta Tomcat and Apache HTTP (1.3, 2.2) Web server in Red Hat Linux.
• Dealt with Linux Utilities: KICKSTART, SSH, FTP, AUTOFS, Quota Management, wrappers, User Management, Process Management, Memory Management, and Text processing tools, Log Management, Package Management, Disk Management and Swap Partition/Files Management.
• Handled installation and configuration of Linux MTAs - (Sendmail, Postfix and Axigen).
• 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.

Environment: Redhat Linux 3,4,5,6 Sun Solaris 8,9,10 Sun V440, V 20 T5240 Sparc stations 20, Switches, VMware ESX 5.1, oracle 11, Confidential Cluster Server 5, and Confidential Operations Manager.

Unix/Linux System Administrator

Confidential, Raleigh, NC

Responsibilities:

• Installed, configured and provided 24*7 support to 500+ Enterprise Sun Servers (E6800, E6500, E4500, and E450) running mission critical applications.
• Built more than 1000 servers from scratch and applied relevant patches on existing servers.
• Built 25+ Red Hat Linux 8.0 servers from scratch and provide 24*7 production support.
• Planned, designed and implemented 4 Node Confidential Cluster on E6800. Troubleshoot Confidential Cluster & issues which arose because of different cluster versions 3.2 & 3.5.
• Migrated Sun Cluster 3.1 to Confidential Cluster 3.5.
• Installed, configured and supported NFS / NIS / NIS+ in a heterogeneous environment.
• Optimized performance by tuning Unix OS, kernel, memory, I/O, Database, Applications and Networks.
• Installed, configured and supported RAID 0, RAID 1, RAID 0+1, and RAID 5 on SANarrays.
• Troubleshoot all hardware and software issues for Sun Enterprise Servers.
• Interacted with SUN Support for resolving critical issues.
• Installed and configured JUMP START Server.
• Jumpstarted more than 3000 Sun servers.
• Decommissioned small and obsolete servers and consolidated them into one large server.
• Planned, Documented and implemented Disaster Recovery policies.
• Restored files from Snapshots. Troubleshoot day-to-day problems on SAN/ NAS.
• Ensured Service Level met and exceeded customer satisfaction goals. Received Recognition Award for ex-ceeding Customer expectations.
• Used Remedy Tool in Production environment which strictly complied with Problem/Change Management policies of the organization.
• Developed shell scripts for automating routine day-to-day tasks, management reports, set up alerts for server resources utilization (CPU, memory, disks, etc.).
• Also wrote scripts for auto install and sun cluster. Wrote Shell scripts for monitoring Unix servers.

Environment: Sun Midrange Servers (E 6800/6500/4500/450 ), Red Hat Linux 8.0 /Quantum tape libraries, Sun Solaris 9 / 8, Sun Cluster 3.1, Confidential Cluster 3.5, Confidential Netbackup 4.5 / 5.1..