SUMMARY:

• 7 years of IT experience in Linux/Unix AIX Systems Administration and Server Virtualization, worked closely with Software development, application and database teams to meet business and technical demands.
• Experience in installation, configuration, backup, recovery, maintenance, and support of Red Hat Enterprise Linux, Oracle Enterprise Linux, SUSE, Fedora, CentOS and AIX on Virtual (VMware) and Physical (HP, Dell and IBM) environments.
• Experience with VMware vSphere ESXi 4.1/5.0/5.1.
• Experience in installing, upgrading and configuring RedHat Linux 3.x, 4.x, 5.x, and 6.x using Kickstart Servers and Interactive Installation.
• Worked with Database administrators to tune kernel for Oracle installations.
• Experience with VERITAS Volume Manager (VxVM), VERITAS File System (VxFS), VERITAS Net Backup, VERITAS Clustering with SAN, NAS environment.
• Experience in installing, configuring and implementing the RAID technologies using various tools like VxVM and Solaris Volume Manager.
• Experience in server monitoring, capacity planning, application monitoring with the help of Nagios, Cacti, and Zabbix.
• Experience using cloud providers and API’s for Amazon (AWS) with CloudSigma (EU).
• Worked on Data - Center operation and migration across UNIX and Linux platforms.
• Experience with creating and managing user accounts, security, rights, disk space and process monitoring in Solaris and Redhat Linux.
• Experienced in implementing and maintaining an Apache/MySQL/PHP (LAMP) web service environment.
• Solid working knowledge of VMware, NFS, NIS, NAS/SAN’s, Puppet/Chef, Jenkins, Kickstart and APT/Yum.
• Good knowledge in IBM AIX hardware components (RS/6000, pSeries), SAN, HBAs, Fiber channel, VERITAS volume manager, trouble-shooting and maintenance of PC's
• Installation and upgradation of packages and patches, version control, service pack and reviewing connectivity issues regarding security problem.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, sendmail, FTP, remote access, security management and security trouble shooting skills.
• Experience on Webservers such as iPlanet Webserver 6.0 /Sun one web server 6.3, 6.5, Tomcat 3.x, 4.x, 5.x, 6.x, and 7.x & Apache Server 1.x, 2.x and integrating them with Weblogic 10.x servers.
• Experience and knowledge on z/VM installation, maintenance, troubleshooting, and strong problem analysis techniques as well as z/VM customization of all OS components.
• Experienced with Redhat Satellite Server with custom repositories to provide a stable management solution for the Linux environment.
• Worked on Puppet for automation of configuration and file/script management in the entire infrastructure from GIT.
• Worked on implementation of Puppet modules to automate configuration of a broad range of services.
• Participated, documented, managed ITIL controls and supported Linux environment.
• Hands-on experience with VMware, installation, configuration of ESX 5.0 and ESXI 5.1.
• Experienced in administering VMware Infrastructure Client 3.5 and vSphere 5.0, Xen, KVM.
• Experienced in Installation of Oracle and MySQL, all facets of HP-UX/Linux Systems Administration in a large SAP/Oracle.
• Experienced in writing shell scripts to automate the administrative tasks using Cron jobs and managing them in repository using GIT.
• Experienced in configuration and installation of Public-Key Infrastructure (PKI) software and hardware to end-user workstations across the unclassified systems.
• Expertise in scripting for automation, and monitoring using Shell, PHP, Python & Perl scripts.
• Experienced in installing firmware upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.
• Good understanding of OSI Model and TCP/IP protocol suite (IP, ARP, TCP, UDP, SMTP, FTP, and TFTP).
• Experience working in SAN environment like EMC Symmetrix DMX3, DMX4 and Clariion CX3 series arrays as well as HP EVA 8400.
• Creating Linux Virtual Machines using VMware Virtual Center and AIX LPARs on P550 and P570.
• Good experience in data center environment.
• Experience in using Perl, shell scripting for Applications, Backups and scheduling.
• Experience in setting up monitoring and alerting using GENEOS and Nagios.
• Managed Puppet infrastructure through major version upgrades. Refactored Puppet code to leverage new features.
• Independent problem solving and a good team player with strong interpersonal and communication skills. Ability to work independently as well as a team member.
• Experience with 24x7 availability to support the production computing environments, providing on-call and weekend support.

TECHNICAL SKILLS:

Operating Systems:  RHEL 5.x/6.x, SUSE 10.x/11.x, Solaris 8/9/10, Fedora 22/23, IBM-AIX 5.X, zVM, IBM power7/6/5 p520s, p550s, p570s, p595s, p760s, p770s, Windows 98/2000/NT.

Hardware:  HP Proliant, Blade servers, Sun Sparc Enterprise M3000/ M4000/ M5000/ T2000/ T4-2, Sun Servers E450/ E3500/ E4500/ E5000/ E6500, Sun Fire V210/ V280/ V490/ V890, Sun Blade T6300, HP Proliant BL 460c Gen6,8/DL 360p Gen8/DL 380 Gen 9, SUN Desktops (SPARC 10, 5), DMX3, DMX4 Storage Arrays

Software:  VERITAS Storage Foundation High Availability 5.1/6.2, VERITAS Volume Manager 3.5/4/5, VERITAS File System, VERITAS Cluster Server, VERITAS Netbackup 6.0, SolarWinds & Groundworks monitoring, MS-Office/MS-Project, Puppet, Chef, Cacti, Nagios

Web/ Application Server:  Tomcat, Splunk, Apache DB2, Oracle Database

Network Protocols:  DHCP, DIG, DNS, SNMP, SMTP, Ethernet, IOS, netstart, NFS, NIS, RIP, OSPF, BGP, TCP/IP, and tcpdump, FTP, TFTP

Scripting Language:  Ksh, Csh, Bash and Perl programming

PROFESSIONAL EXPERIENCE:

Senior Linux Administrator

Confidential, NY 

Responsibilities:

• Installation & Configurations of Red Hat Linux 7/6/5 Solaris 9/10/11, Cent OS, Maintenance & System Administration. (RPM, YUM)
• Installed and configured Linux and Windows operating systems on VMware server.
• Maintaining of Clusters (Creating and Scheduling jobs).
• Documenting Server Details for future support.
• Implemented Jumpstart on Solaris and Kick start for Redhat environments.
• Configured LDAP on RedHat for authorization and authentication
• Administered and Configured Logical Volume Manager which involved create and modify file system, logical volume, Physical volume, Volume groups, mirroring and un-mirroring of volume groups, hot spare physical volume
• Worked on Networking and communication devices, Server Utilities, TCP/IP, and FTP. Expert in data center operations including hardware, software setup monitoring, troubleshooting ll and Configure WebSphere Application 7.x/6 and WebSphere Commerce Servers 7.x/6/5.6.
• Performed upgrade on Red hat Linux whenever required.
• Upgraded and maintained software packages on servers using RHEL Satellite and Repository servers.
• Performed hardware & software installations, upgrades & maintenance, patch administration, kernel modification / upgrades, file system management, performance and security analysis, and network configuration/tuning. User and group administration with advanced file permissions.
• Decreased footprint and decommission services. Created a mirror copy of bare metal into a virtual environment.
• Configuring, administering and trouble shooting of NFS, NIS (master, slave and client) and DNS (Bind 8.2.x and 8.3.x) in multi-platform networks
• Perform Operational tasks like monitor log files, migration between environments & performance tuning.
• Work closely with DevOps team to support infrastructure and tools that facilitate product development.
• Implemented a Nagios monitoring system to notify of system issues.
• Shell Scripting: ksh, csh, python with application & dev support.
• Experience in monitoring and performance troubleshooting in both oracle databases and VMware infrastructure and in database management in oracle and Mysql.
• Package management using RPM, YUM and UP2DATE in RHEL
• Good knowledge of RAID groups and setting up NFS, CIFS and iSCSI protocols in SAN/NAS environment on RedHat
• Support Apache, Tomcat and generate SSL Keys to renew SSL certificates on webservers.
• Hands on experience on troubleshooting Boot Loaders like GRUB
• Implementation and troubleshooting of network services like NFS, FTP, SAMBA, NTP, Telnet, SSH
• Maintained a NIS environment for both QA and production. Configure NIS clients and troubleshoot NIS related problems
• Securing the Linux Server and Network Services using TCP/IP Wrapper and Net filter (ip tables)
• Instrumental in System Kernel compilation and configuration.
• Automated system configuration using Puppet.
• Creating profiles manifests for new servers, and pushing them to servers using puppet.

Environment: RHEL 6.x/5.x, Cent OS 5.7, Solaris 9/10/11, Apache 1.2/1.3/2.x, Logical & VERITAS Volume Manager, VERITAS net backup 5.x/6.0, VM ESX 4.x/3.x.

Senior RedHat Linux/Unix Administrator

Confidential, Uncasville, CT

Responsibilities:

• Installed RHEL 5.0/6.0 using Kickstart and custom building the servers per SOW.
• Installation and configuration of Solaris 10 with Zones, Containers and LDoms.
• Installed/configured EMC Storage with 0, 1 & 5 RAID configurations. 
• Installed VERITAS Volume Manager 5.0/5.1/6.0, VCS Cluster Server 5.0/5.1/6.0 for failover and for mirroring and raid level configurations on EMC storage frames.
• Performed all System Administration tasks like Cron jobs, installing packages, and patches. Configured and installed Automount and Jumpstarted Solaris servers.
• Firewall configuration using ip tables and worked with selinux configuration.
• Configured and maintained Samba Server, NFS Server, NIS Server and clients, DNS clients and AutoFs File systems.
• Provide support for CAC (Common Access Card). Troubleshoot smart card readers, middleware and PKI (Public Key Infrastructure) Certificates.
• Performing tape backups, archiving and checking data integrity through Shell/python scripts and job automation. Repository management through GIT and SVN.
• Configuration Puppet, Chef for main servers, implementation of configuration files and main services of monitoring (Zabbix), web-servers, security (Log Rhythm), ip tables, etc.
• Installed, configured VMs on VMware 5, vSphere 5.0, configured ESX hosts, added data stores to ESX hosts, created vSwitches, templates and migrated VMs across ESX hosts.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage.
• Responsible for installing and configuring Nagios on Linux, Solaris clients.
• Worked with troubleshooting and tickets related to Amazon Web Services (AWS) with vendor.
• Testing and upgrading production, development and test Linux and Solaris servers.
• Creation & maintenance of user accounts, passwords and profiles, home directories, initialization of files, groups’ creation and management, setting file permissions, customizing shell environment setup for users.
• Created LVMs on the Linux servers for disk management and configuration of email protocols like sendmail and postfix.
• Installation, setup and configuration of Apache Kafka and Apache Zookeeper.
• Troubleshooting various problems related to VxVM in initializing, replacing, mirroring, encapsulating and removing disk devices on various Production Boxes.
• Maintaining production critical servers running Solaris UNIX, Linux supporting Oracle database and web services while providing 24x7 support.
• Worked with VERITAS Net Backup 7.5 on development and production servers for backups and restores.
• Creating Database users, roles, profiles, alert logs/ trace logs on Oracle Database application boxes and worked on RAC.
• Implementation of a new rating plan, including pricing by peril and many new rating data elements and rating attributes.
• Writing Shell Scripts for managing day-to-day transactions & for automation of routine tasks & troubleshooting Cassandra issues.

Environment: Red-Hat Linux Enterprise servers (HP Proliant DL 585, BL 465/485, ML Series), HP-UX, AIX Solaris 8, 9, 10, AIX 5.3, 6.1, SAN (NetApp), BladeLogic, VERITAS Cluster Server 5.0/6.0, Windows 2003/2012 server, Shell programming, GIT, SVN, JBoss 4.2, JDK 1.5, 1.6, VMware Virtual Client 5.1, VMware Insfrastructure 5.1.

AIX System Administrator

Confidential, Roseland, NJ 

Responsibilities:

• Administered multiple IBM power7/6/5 p520s, p550s, p570s, p595s, p760s, p770s running AIX 5.3/6.1/7.1.
• Co-ordinated application team to Upgrade AIX 5.2 to AIX 5.3, AIX 5.3 to 6.1, AIX 6.1 to 7.1
• Design, build, install and configure Red Hat Enterprise Linux servers & workstations.
• Administrating and managing windows servers including configuration and troubleshooting of Active Directory, DNS, DHCP, IIS.
• Configured Microsoft Active Directory domains and managed Active Directory users on Windows Server 2003 along with LDAP user management with sendmail email configuration.
• Worked on Linux x86, Windows 2003 Advance Server, Samba, Squid, Active Directory Create and administer RedHat Enterprise Linux operating systems to implement on the existing network.
• Responsible for the operation, maintenance and integrity of a distributed, networked AIX based environment.
• Migrated Linux based machines & Power off Machines to virtual machines using VMware converter boot CD. PowerHA 6.1 and 7.1 or Cluster Node or later - HACMP.
• Creating and building AIX LPAR by PowerVM Tool and VIO mapping.
• Used shell scripting (Including Korn, Bash and Perl) for system/application in automating server task, installing and monitoring applications and data feeding file transfer and log files.
• Good knowledge on BMC Blade Logic Console, worked on IBM Frames p740, p750, p770.
• Started working on POWER 8 Frames - see difference between P7 and P8.
• Creating and building AIX LPAR Manually via NIM servers.
• Installing security file sets like Centrify, nmda and networker, invista, DS agents, Petrol Agents, ip tables.
• Performed 6.1, 7.1 AIX OS Installation manually and through Blade-logic Console.
• LPM and troubleshooting the encountered errors, and AIX 6.1 patching --TL06 to TL08

Environment: Hardware: IBM - p5-520, p5/p6-550, p5/P6-570, p5/p6-595, p7-750, O/S: IBM AIX 5.1, 5.2, 5.3, 6.1, 7.1, Linux, VIO 1.3, 1.5, 2.1, Samba, GIT.

UNIX / RedHat Linux Systems Administrator

Confidential, Springfield, MO

Responsibilities:

• Configuration & migration of UNIX and Linux operating systems.
• OS cloning using System Imager. Create Golden client and copy the image of golden client at system image server.
• Install new OS using system image of Golden client and installation of packages and patches.
• Work with the application team to start applications and resolve any issues as reported from CRM.
• Troubleshooting of networking issues after migration.
• Shell and Perl scripting for automation of routine tasks, python for testing and version control using GIT repository.
• Migration and troubleshooting of VERITAS Cluster.
• Disk and File system management through Logical Volume Manager including GFS (Global File system).
• Analyze user requirements, propose alternative solution in setting up local area network and maintain existing network up and running.
• Proven ability to automate server builds using Kickstart, jumpstart, management and configuration of system services using Puppet.
• Red Hat Satellite Server for upgrading and patching Linux Servers.
• Analyze, review and alter existing network to increase operational efficiency or adapt to new requirement.
• Support and administer various network infrastructure components to ensure uptime and reliability.
• Routine administrative tasks, like troubleshooting and correcting problems in the existing network.
• Manages process to ensure product release, applications, and corporate block point cycles are synchronized.

Environment: Red Hat Linux (RHEL 4/5), Logical Volume Manager, VERITAS Cluster Server, Global File System, Red Hat Cluster Servers, Oracle, MySQL, Sun Solaris 8/9/10, AIX 5.3L, Windows, Sun Fire 3800/4800/6800 , V890, V880, V490, V480 and V210, VCS, VERITAS Volume Manager, VERITAS Net backup, Ksh/Perl programming, DNS, NIS, NFS, Apache, Tomcat.

UNIX/LINUX Administrator

Confidential

Responsibilities:

• Installation and configuration of Red Hat Enterprise Linux (RHEL) 5x, 6x Servers on HP, Dell Hardware and VMware virtual environment.
• Installation, setup and configuration of RHEL, CentOS, OEL and VMware ESX on HP, Dell and IBM hardware.
• Installation and configuration of Sun Enterprise Servers, HP and IBM Blade Servers, HP 9000, RS 6000, IBM P series.
• Expertise in enterprise class storage including SCSI, RAID and Fiber-Channel technologies.
• Configuration and maintenance of virtual server environment using VMWARE ESX 5.1/5.5, vCenter and vSphere.
• Adding SAN using multipath and creating physical volumes, volume groups, logical volumes.
• Storage Provisioning, volume and file system management using LVM, VERITAS Volume Manager and VERITAS File system (VERITAS Storage Foundation), Configuring ZFS file systems.
• Creating user accounts, user administration, local and global groups on Solaris and Red Hat Linux platform.
• Setup, implementation, configuration, and documentation of backup/restore solutions for Disaster/Business recovery of clients using TSM backup on UNIX, SUSE & RedHat Linux platforms.
• Installed and configured Netscape, Apache web servers, Samba Server and WebSphere Application servers on Linux and AIX.
• Installation and configuration MySQL on Linux servers.
• Performed quarterly patching of Linux, AIX, Solaris and HPUX servers on regular schedule.
• Heavily utilize the LAMP stack (Linux, Apache, MySQL, PHP/Perl) to meet customer needs.
• Installation and configuration of Oracle 11g RAC on Red Hat Linux nodes.
• Installed and configured different applications like apache, tomcat, JBoss, xrdp, WebSphere, etc. and worked closely with the respective teams.
• Setup, implementation and configuration of SFTP/FTP servers.
• Setting up JBoss cluster & configuring apache with JBoss on RedHat Linux. Proxy serving with Apache. Troubleshooting Apache with JBoss and Mod jk troubleshooting for the clients.
• Working on Shell and Perl scripts, and system performance monitoring and tuning.
• Setting up the lab environment with Tomcat/Apache, configuring the setup with F5 virtual load balancer for customer application.

Environment: RedHat 4x, 5x, Solaris 9/10, AIX, HP-UX, VMware ESX 5.0/5.1/5.5, VSphere, HP ProLiant Servers DL 380/580, Dell Servers (R series), Windows 2008 sever, EMC Clariion, Netapp, SCSI, VMWare converter, Apache Webserver, F5 load balancer, oracle, MySQL, PHP, DNS, DHCP, BASH, NFS, NAS, Spacewalk, WebSphere, WebLogic, Java, Jenkins, JBoss, Tomcat, Kickstart.

System Administrator

Confidential

Responsibilities:

• Involved in design, configuration, installation, implementation, management, maintain and support for the Corporate Linux servers RHEL 4x, 5.x, SLES 9, CENTOS 5.x.
• Installation of patches and packages using RPM and YUM in Red hat Linux.
• Created and modified application related objects, created Profiles, users, roles and maintained system security.
• Responsible for setting up cron jobs scripts on production servers.
• Installed and configured SAMBA server for Windows and Linux connectivity.
• Monitored System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Responsible for writing/modifying scripts using she, kasha, and bash for day-to-day administration.
• Modified Kernel parameters to improve the server performance in Linux.
• Installed and configured Apache / Tomcat web server.
• Creation of Logical volumes (LVM) for Linux operating systems.
• Coordinating with 24 x 7 on-call support personnel in debugging.
• Maintained proper documentation of all the activities carried out during the project.
• Worked with DBA team for database performance issues, network related issues on Linux Servers.
• Created and modified users and groups with SUDO permission.
• Installed and configured VNC server/client.
• Coordinating users for any server activities which may involve major changes on software or any hardware related issues.
• Maintained proper documentation of all the activities carried out during the project.

Environment: Red Hat Linux (RHEL 4/5), Logical Volume Manager, Global File System, Red Hat Cluster Servers, Oracle, MySQL, DNS, NIS, NFS, Apache, Tomcat