SUMMARY:

• Overall 8+ years of work experience in Unix/Linux System Administration with DevOps, Solaris, AIX and windows environments.
• Expertise in Linux (Red Hat Enterprise Linux7.x/6.x/5.x), Sun Solaris(8/9/10)Windows(2000/2003/XP)
• Experience in automating all aspects of infrastructure, application and configuration management using Ansible , Puppet , Chef , AWS (Amazon Web Services). 
• Worked on EC2 , Cloud watch , Elastic search and managing security groups on AWS . 
• Hands on experience in working with Amazon Cloud Services (EC2, S3, EBS, ELB, IAM, AMI, Route 53, RDS). 
• Proficient in Chef Environment with multiple servers and deploying manifests. 
• Extensively worked on continuous integration tools such as Ant , Maven and Jenkins for end - to-end automation of various  build and deployments. 
• Experience in Installing, Upgrading and Configuring Red Hat Enterprise Linux 7.x,6.x,5.x using kickstart Servers
• Installation and Upgradation of Packages and Patches, configuration management, version control, service pack & reviewing connectivity issue regarding security problem.
• Experience in installation and management of network related services like DNS, Apache, LDAP, SAMBA, HTTPD, VSFTP and SMTP.
• Experience in administering Solaris & Linux.
• Experience in Installation, Configuration, Backup, Recovery, Maintenance, Support of Sun Solaris & Linux.
• Developed and maintained Perl/Shell scripts for build and release tasks.
• Installed and updated packages using YUM, RPM and managed packages through Red Hat Satellite Server.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, send mail, ftp, remote access, security management and Security trouble shooting skills.
• Creating Database using MYSQL and POSTGRESQL on Red Hat Enterprise Linux.
• Experience in Server Monitoring, capacity planning, application monitoring with the help of Nagios, Cacti and Zabbix.
• Experience in using Tomcat, JBOSS, WebLogic and WebSphere Application servers for deployments.
• Experience in Installing Firmware Upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.
• Experience in Creation and managing user accounts, security, rights, disk space and process monitoring in Solaris and Red Hat Enterprise Linux
• Hands on experience in Puppet deployment, dashboards configuration and Puppet DB
• Creating and Managing Database managements and Logical Volume Manager (LVM) in Red Hat Linux
• Support enterprise Storage Area Network (SAN) and Tape Backup/Restore technology in a mission critical environment.
• Team player with good management, deep understanding, strong interpersonal and communication skills and analytical skills with a high learning to adopt new technologies.

TECHNICAL SKILLS:

Operating Systems:  Red Hat Enterprise Linux (RHEL 7/6/5), Sun Solaris 10/9/8, HP-UX (11.23,11.11) and windows (XP/2003/2000)

Hardware:  HP Proliant, Blade Servers, Sun Servers e450, e3500, e4500, e5000, e6500, e10k, e15k, e25k, HP ProLiant DL 380 G4/G5/G6G7, DL 580/680 DL-G5/G6/G7/G8/G8p, DELL R710/910/920, CISCO 6500 series switches, EMC

Software:  Veritas Volume Manager 3.5/4/5, Veritas Filesystem, Veritas Cluster Server 3.5, VeritasNetbackup 6.0, MS-Office/MS-Project.

Network Protocols:  HTPP/HTTPS, Ethernet/IP, DHCP, DNS, SNMP,SMTP,IOS,netstat,NFS, NIS,nslookup,RIP,DIG and tcpdump

Web/Application Server:  Apache HTTP server 2.2/2.4, Apache Tomcat 6.0/7.0/8.0, WebSphere Application Server, JBOSS, WebLogic Application Server, LDAP servers

Database:  Oracle 9i, MySQL, MongoDB, PostgreSQL

Virtual/Cloud Environment:  VMware server, VMware workstation, OpenStack

Programming Languages:  C++,HTML,SQL,PHP,XML,Python,Ruby,Shell Programming

PROFESSIONAL EXPERIENCE:

Confidential,Atlanta, GA

Sr. Unix/Linux Systems Administrator

Responsibilities:

• Installing, upgrading, testing, tuning and loading patches on Red Hat Enterprise Linux (RHEL 7.x/6.x) and troubleshooting both physical and virtual server issues.
• Build servers using Kick Start , Red Hat Satellite Server , and VSphere Client .
• Performing Post Build activities like Setting up Backup interface/ NIC bonding/ Loading additional Packages/ Joining the server to Active Directory, etc.
• Installed and configured Linux/Unix and Windows operating systems on VMware server.
• Installed, configured, cloned VMs on VMware 5.5, Vsphere 4.0, configured ESX hosts, adding datastores to ESX hosts, creating vswitches, templates, migrating VMs across ESX hosts.
• Implemented Nagios tool for monitoring and Splunk to generate data metrics.
• Expertise in Puppet Administration tool which acts as a puppet dashboard for managing puppet profiles, modules, classes and top scope variables.
• Expertise in Puppet Promotion tool which helps us to promote code/puppet modules across the environments in an organization.
• Worked on AWS server provisioning and standardization using Puppet Manifests.
• Wrote recipes and manifest to configure chef nodes and Puppet agents
• Wrote Puppet manifests on conditional expression based on agent specific data, which is available through Factor.
• Created various modules and Manifests in puppet to automate various applications.
• Responsible for configuring real time backup of web servers.
• Involved in developing custom scripts using Shell (bash, ksh) to automate jobs.
• Managed shared NFS files system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting and stopping the NFS services.
• Worked on configuration and administration of LVM as extending Logical Volume and Physical Volume Size.
• Installation/Activation of F5 Load balancers, configure routing logic, creation of new service pools, members, virtual servers etc.,
• Production support of Apache and JBoss including installation, configuration, management and troubleshooting. Installation and monitoring of Veritas Volume Manager, VERITAS NetBackup and Veritas Cluster Server on SAN Environment.
• Support enterprise Storage Area Networks (SAN), and Tape Backup/Restore technology in a mission critical environment.
• Network installation and configuration. Troubleshooting general TCP/IP/DNS, DHCP, Network problems switches and port, map network drives.
• Migrate Physical Servers to Virtual Serves using VMware Converters and migration of Virtual Machines using V-Motion.

Environment: (RHEL 7.x/6.x), vSphere Client, Kick Start, Red Hat Satellite Server, VMware server, Nagios, Splunk, Puppet, Shell Scripting (bash, ksh), NFS, LVM, Apache, JBoss, SAN, TCP/IP, DNS, DHCP.

  Confidential,Woonsocket, RI

Sr. Unix/Linux Systems Administrator

Responsibilities:

• Installation and administration of RHEL 5.x, 6.x and Cent OS 6.
• Configured kickstart server and updating/applying patches to the servers using Red hat Satellite server.
• Remote system administration using tools like SSH, Telnet, and Rlogin.
• Used ANT and Python scripts to automate the Build and deployment process to deploying the web services.
• Load Balancing / Clustering / High Availability / Ldap Replication.
• Configuring User Authentication Stores and Policy Authorization Stores on LDAP.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Applied appropriate support packages/patches to maintain system integrity.
• Working on AWS Auto Scaling for providing high availability of applications and EC2 instances based on the load of applications by using Cloud Watch in AWS. 
• Performed capacity analysis, monitored and controlled disk space usage on systems.
• SSL offloading, Cert management and Troubleshooting experience on F5.
• Installation, configuration and upgrade of Apache, Oracle& IBM Databases on the RHEL Systems manually and also through Puppet.
• Create and manage user accounts including SUDO access.
• Automate Deployment using configuration Management tool like puppet to provision amazon AWS Instances to enable continuous Deployments. 
• Network Services included DNS, DHCP, WINS, Proxy Services (Threat Management Gateway/TMG) and IPAM requests.
• Custom build of Windows 2003 and Windows 2008 servers which includes adding users, SAN, network configuration, installing application related packages, managing services.
• Creating profiles, manifests for new servers, and pushing them to servers using puppet.
• Responsible for maintenance of development tools, utilities and to maintain shell, Perl automation scripts.
• Creating virtual machines using Xen and deploying OS, managing hardware.
• Installed, configured, cloned VMs on VMware 5, vSphere 4.0, configured ESX hosts, adding datastores to ESX hosts, creating vswitches, templates, migrating VMs across ESX hosts.
• Installing, configuring Jboss 4.3 on Linux, Unix servers, integrating it with Apache server.
• Monitoring of various services using Service Management Facility and Service Administration.
• Installing, configuring VeritasNetbackup 6.5 on Linux, Solaris servers, creating backup polices.
• Designing Firewall rules for new servers to enable communication with application, Oracle 10g servers.
• Working on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager& Solaris Volume Manager. File system Tuning and growing using VERITAS File System (VxFS), coordinated with SAN Team for storage allocation and Disk Dynamic Multi path.
• Worked on resolving production issues and documenting Root Cause Analysis and updating the tickets using BMC Remedy.
• Fine tuning of Servers and configuring networks for optimum performance.
• Organized various meetings with teams as mentioned above for tracking their requirements as inputs to get this done and designed the plan/steps involved and took user approvals.
• Installation, maintenance and administration of Oracle and Db2 Server on Sun Servers.
• Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• Created new groups and tested first in development, QA Boxes and then implemented the same in production Boxes.

Environment: Red Hat Linux AS/EL 5.x,6.x, Cent OS 6, Sun E10k, E25K, E4500, Sun Fire V440/880, DMX 3 & DMX4, SCOM, Site minder, SonicMQ 7.0, VxFS 4.1, VxVM 4.1, SVM.

Confidential,Coraopolis,PA

Sr. Unix/Linux Systems Administrator

Responsibilities:

• Installation and configuring of SUN Solaris and Linux servers.
• Involved in Building and configuring Solaris 8/9/10 using Jump start server and Red Hat Linux Servers using Kickstart server as required for the project. Maintained maximum uptime and maximum performance capacity for Enterprise Production, QA, and UAT/Staging.
• Incident management for Unix Servers (Solaris, Linux).
• Configured, tested and troubleshoot newly built Linux servers with Nic card configurations, TCP/IP and applications that ran off TCP/IP stack.
• Creating a local YUM repository for installing and updating packages.
• Installation, configuration and upgrade of Apache, JBOSS, Web sphere, MQSeries, Oracle & IBM Databases on the RHEL and OEL Linux Systems manually and also through Puppet.
• Evaluated varied system logs and enforced good practices for web and application server environments.
• Configured servers and infrastructure running Red hat on JBOSS, using PUPPET to configure, install, manage and bring up JBOSS and applications.
• Developed Web application using Java, Servlets, JSP, JSTL, Java Beans, EJB, JNDI, JDBC, Struts, HTML, CSS, XML.
• Experience in applying patches and plug-ins for JBOSS application server.
• Installed and configured JBOSS Application servers on DEV, QA and PROD Systems.
• Migrated Applications from UNIX (Solaris, AIX and HPUX) to Linux (Red hat) systems.
• Tuned OS parameters like SWAP and virtual memory settings to improve the JBOSS performance.
• Configured Apache for JBOSS domains with virtual servers.
• Using Wire Shark Capture and analyze TCP, UDP, IP Packets.
• Experience in implementing high availability clusters using Red hat Cluster Solution (RHCS) with EXT3 and EXT4 file systems, VERITAS Cluster with VERITAS volume manager.
• Experience in Data Transfer of large amounts of Data sets required for migration. Data in few servers are in close to 100TB.
• Extensive use of Rsync utility for customized data migration from UNIX to Linux systems.
• Day to day troubleshooting and support for the end users newly migrated to Linux.
• Provided tested documented solutions for the second level infrastructure support teams for cutover activities from UNIX to LINUX which involves various scenarios like Hostname Swap, Hostname and IP swap, IP swap.
• Experience in migrating UNIX servers with High availability solutions such as HACMP and HP service Guard to the Linux servers with High availability solution from Red hat (RHCS).
• Performance monitoring and tuning of Linux servers.

Environment: Solaris 8/9/10, Red Hat Linux 4/5, BMC Tools, NAGIOS, VERITAS NetBackup, Korn Shell, Bash Scripting, Veritas Volume Manager, web servers, LDAP directory, Active Directory, BEA Web logic servers,SANSwitches,Apache, Tomcat WebSphere, WebLogic application server.

Confidential

Sr. Unix/Linux Systems Administrator

Responsibilities:

• Installation, configuration and administration of 200+ Red Hat Linux servers and support for Servers.
• Responsible for maintaining and administering production IBM p520, p570, p590, p595, p770 & p795 AIX & UNIX based servers.
• Responsible for software (migrating from older version of AIX to newer version) and hardware refreshes (responsible for migrating the old hardware to new hardware)
• Installation, migration, Configuration and Administration of AIX 5.1, 5.2, 5.3 & 6.1.
• Experienced in migrating AIX5.3 to AIX6.1.
• Installation, maintenance and regular upgrades of Red Hat Linux Servers using kickstart based network installation.
• Performed RPM and YUM package installations, patch and other server management.
• Installed, configured and maintained HTTPD server for Intranet specifications
• Installation, Configuration and Troubleshooting of Linux and Windows Servers.
• Creating and restoring the backups in AIX using mksysb.
• Automated the Virtual I/O Server and HMC backups.
• Placing the hardware call and Follow up with IBM Hardware Support to fix hardware problems.
• Installing and Configuring Red Hat Linux in VMWare Environment.
• Knowledge and understanding of effective trouble ticket tracking system use.
• Configuring, Implementing and Troubleshooting access lists.
• Performing Linux Kick Start installation, RAID&LVM Implementation.
• Implementing Security using TCP wrappers, PAM & Iptables.
• Scheduling Job with Crontab.
• Configuring inner and outer view of DNS server to resolve internal &external queries
• Configuring various Hardware level RAIDS on Dell Blade Server (Power Edge 860 & 2850 series)
• Updating & recompiling the kernel for our requirements.
• Preparing centralized installation server comprising FTP, Webserver and NFS.
• Register Puppet  as a solution instance and importing Puppet classes and services.
• Used Puppet RAL to describe a desired state for different environment (Test, DR, Staging and Prod).
• Setup Puppet dashboard and ensure that Puppet master can communicate to Puppet client.

Environment: Red Hat Linux 6.x/5.x, NFS, Hardware: Dell Servers and Intel Boxes

Confidential

Sr. Unix/Linux Systems Administrator

Responsibilities:

• Installed, upgraded and configured of Red Hat Enterprise Linux (RHEL 4.x).
• Installed and upgraded patches using YUM and RPM in RHEL 4.x.
• Worked on creating, maintaining and troubleshooting LVM and file management
• Installed and configured SSH for secured access.
• Administered local and remote servers using the SSH tool on daily basis 
• Experienced in Install Operating System and configured kernel parameters for Linux/Unix servers.
• Performed user administration by adding/deleting/modifying users, user groups and respective privileges and resource permissions.
• Installed and implemented NAS with RAID 1 and RAID 5 configurations.
• Installation, configuration and management of PostgreSQL & MySQL database servers.
• Installed and configured Apache 2.x web server, which included tasks like creating virtual hosts, installing SSL certificates etc.
• Administrative tasks such as System Startup/shutdown, Backup strategy, Printing, Documentation, User Management, Security, Network management, dumb terminals and devices carried out.
• Worked in setting up DNS, DHCP Server along with effective Group and System Level policies and roaming profile features by using Samba and NFS

Environment: Red Hat Linux 4.x, YUM, RPM, LVM, SSH, Kernel Parameters, User Administration,NAS,RAID, PostgreSQL, MySQL, Apache 2.x,DNS,DHCP,SAMBA,NFS.