SUMMARY

• Around 5+ years of experience in System Administration working on RedHat Enterprise Linux (RHEL), Cent OS, Ubuntu, Sun Solaris, SUSE, Amazon Web Services, DevOps, and windows environment.
• Linux/Unix system administrator on RedHat EL 5.x, 6.x, 7.x, CentOS Linux 4.x, 5.x, SuSe, Oracle Enterprise Linux, Solaris 8,9,10 and VMware V - sphere ESX/ESXi environment.
• Good knowledge about Splunkarchitecture and various components (indexer, forwarder, search heads, deployment server), Heavy and Universal forwarder, License model. Indexer clustering and search head clustering.
• Expert in installingSplunkapps forLinuxand UNIX environments.
• Provided support to DB team, in managing backups, restoring from snapshots, establishing connectivity between application and DB, help in migrating DB, configuring application to listen to DB etc.
• Implemented DB2 Performance Expert monitoring tool on Dev, QA and Prod servers.
• Expert level understanding in implementing TCP/IPaddressing scheme, LAN/WAN Protocols, and IP Services
• Troubleshoot the issues at server level (Physical & Virtual VMware, Zones, LDOMs).
• Troubleshoot hardware and software problems, takes appropriate corrective action and/or interact with IT staff or vendors in performing complex testing, support, server recovery, and troubleshooting functions.
• Installation, Configuration and administration of DNS, LDAP, NFS, NIS, NIS+ and Sendmail on Red hatLinux /Debian Servers.
• Installing and configuring OS Watcher tools to gather data on disk utilization, CPU utilization, operating system and other applications.
• Used Puppet to manage Web Applications, Config Files, Data Base, Commands, Users Mount Points, Packages
• Experience with DevOps tools Chef, Puppet, OpenStack, AWS EC2, S3 Storage, Jenkins, Git, JIRA.
• Maintain Chef and Puppet servers and management application that can use Service Now (CI) data to bring computers into a desired state by managing files, services, or packages installed on physical or virtual machines
• Experience in monitoring the availability & performance of RedHatLinuxServers through tools like mpstat, vmstat, iostat, netstat and nfsstat.
• Worked with tools like Nagios, Splunk, Zabbix and Solar winds for performance monitoring and checking health status of the servers.
• Experienced in Installs, Upgrades, Patches, Configuration, performance tuning on LUNIX and system software & hardware.
• Manage & monitor network environment using tools such as HP Openview, Network Node Manager, NetQoS, ProactiveNet, Hostmon andTCP/IPUtilities.
• Good presentation, customer support and trouble shooting skills & experience in providing 24x7 supports.

TECHNICAL SKILLS

Operating Systems: Redhat RHEL 7/6/5, Cent OS, SuSe, Ubuntu, HP-UX, AIX, Sun Solaris, and Windows 2003/XP/2000

Version Control Tools: SVN, GIT, Team Foundation Server, Splunk

Languages: C, SHELL, PowerShell, Bash, JSON, PYTHON.

Virtual/Cloud Environment: AWS, Azure, VSphere Client, VCenter Server, ESXi

Repository managers: RPM, YUM, GitHub.

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

Database: MYSQL, Oracle 9i/10g, SQL Server 2008, DynamoDB, RDS, PostgreSQL.

Storage: LVM, SCSI, SATA, NAS (NFS, SAMBA, RAID 0/1/5/10) and SAN (iSCSI, Fiber Channel)

Network Protocols: DHCP, DNS, SNMP, SMTP, POP3, IMAP, Ethernet, Netstat, VPN, NFS, NIS, RDP, TCP/IP, TOTP, FTP, TFTP, HTTP & HTTPS

PROFESSIONAL EXPERIENCE

LINUX ENGINEER

Confidential, GA

Responsibilities:

• Experience in designing backup, recovery, maintenance, and support of RedHat Enterprise Linux, Oracle Enterprise Linux, SUSE, CentOS and AIX on Virtual (VMWare) and Physical (HP, Dell and IBM) environments.
• Hands on experience of installation, configuration, support and maintenance of various enterprises Red HatLinuxand other UNIX servers i.e. CentOS & AIX.
• Experience in troubleshooting, performance tuning, storage & security management and user administration inLinuxservers.
• Enabled SSH, SFTP and SUEXEC access for functional accounts onLinuxand AIX Servers supporting WebSphere Applications.
• Created VMware Virtual machines using vSphere and installed Red HatLinux5x/6 on the VMs and standalone Dell servers.
• Performed automated installations of OS using Jumpstart for Solaris and Kickstart for Linux.
• Worked with other IT teams, customers (users), and other managers in helping buildand implement systems and standards.
• Extensive experience of configure and manage volume/File system management using Veritas Volume Manager (VxVM), Logical Volume Manager (LVM) and Solstice Disk Suite (Solaris Volume Manager).
• Performed Restack migrations for Red hat Servers supporting Middleware applications such as WebLogic and Jboss from Physical blade servers to Virtual Machines in the VMware Infrastructure.
• Installed, Configured MySQLin differentLinuxoperating systems like RHEL and oracleLinux.
• AdministeredLinuxservers for several functions including managing Web Sphere, Apace/Tomcat server, mail server,MySQLdatabase, and firewalls in both development and production.
• Proficiency in design, architect and manage Datacenter Migrations and Disaster Recovery.
• Expert in installingSplunkapps for Linux and UNIX environments.
• Planning, documenting and supporting high availability, business persistence across the various cluster platforms like VERITAS, SUN clusters.
• Experience configuring and managing Puppetmaster server and also experience in updating and creating modules and pushing them toPuppetclients
• Implemented multi-tier application provisioning in OpenStack cloud, integrating it with Puppet. Deployed Puppet, Puppet dashboard for configuration management to existing infrastructure.
• Well versed with deployment, migration, integration, upgrades and maintenance of middleware applications and Bash scripting.
• Managed Linuxbased middleware infrastructure including Installation, configuration and integration with other components; includes Apache-tomcat, JBOSS, WebObjects, LAMP etc.
• Monitored some applications by using of Monitoring tools like Nagios, Custom checks, App Dynamics, Splunk, and monitoring with some system tools like HTOP, TOP, VMSTAT, IOSTAT, NETSTAT and LSOF helps to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.
• Install and configure various services like DHCP, NFS, DNS, Apache Web Server, NIS, LDAP, Samba, JBoss, Web Sphere, SSH, FTP/SFTP, Send mail/SMTP, Telnet, Web logic, RPM Package Management, File System Management.

Environment: Red HatLinux, UNIX, VMWare, AIX, SSH, SFTP, SUEXEC, VxVM, VERITAS, LVM, SUN clusters, DHCP, NFS, DNS, Apache Web Server, NIS, LDAP, Samba, JBoss, Web Sphere, Splunk, Puppet, JBOSS, LAMP, MySQL.

LINUX ENGINEER

Confidential, TN

Responsibilities:

• Maintained and monitored 500+ Linux/UnixServers with Multi-Datacenter environment.
• Updating and upgrading ESXi 5.x, 6.x servers, vCenter Server, using vSphere Update Manager and VM Tools through manual updates.
• Experience in RHEL Provisioning, Upgrades, Patching, Configuration and Performance Tuning inLinuxenvironment using satellite server.
• Experience in Planning, coordinating, executing Quarterly Full stack patching for EXADATA with no downtime
• Installing, configuring, and maintaining Enterprise Manager Cloud Control to monitor and manage EXADATAand regular databases
• ManageLinux(RHEL) Servers 5, 6. Configured Monitoring Tools and applications such as apache and jboss
• Managed UNIX's server services such as Bind DNS, Postfix, Apache web server, Tomcat and MySQL.
• Patching, shell scripting, file-system management and performed daily administrative tasks.
• Responsible for configuring networking concepts like TCP/IP, NIS, NFS, SAMBA, LDAP, SSH and FTP.
• Work with application specific kernel parameters, system hardening, implement firewall, allow and disallow port access.
• Work with latency sensitive workload that includes process scheduling, memory, network and overall performance tuning of RHEL.
• Maintaining complex LAN/WAN networks with several VLANS and provided support for routing protocols and providing secure sessions over internet using IPsec andSSLencryption.
• Configured Red Hat Cluster Nodes for any legacy applications and verified the daily health check on the Cluster Nodes.
• Performing Patching/Upgrading/and vulnerability fixes using redhat satellite Servers.
• Configuration and administration of DNS (Bind on Linux), Web (Apache), DHCP and FTP Servers.
• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, FTP, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.
• Used Shell Scripting (Bash and Ksh), Ruby and Python based scripts for merging, branching and automating the processes across the environments.
• Troubleshooting and administered high availability using Red hat Cluster, VERITAS Cluster server on various business critical database and application production servers.
• Implemented open source base monitoring tool Nagios 3.0 for servers, SAN switches, EMC SAN Storage, and VMware ESX and ESXi.
• Worked on different VMware products like VMware workstation, GSX/VMware server, VMware player, VMware Converter and ESX server 3.X.

Environment: ESXi, GSX/VMware server, VMware player, VMware Converter, EXADATA, SAN switches, EMC SAN Storage, Bind DNS, Postfix, Apache web server, Tomcat, MySQL, VLANS, SNMP, Shell Scripting (Bash and Ksh), Ruby, Python.

Linux Administrator

Confidential

Responsibilities:

• Problems & performance issues; deployed latest patches for Sun, Linux and Application servers, Performed Solaris, and RedHat Linux Kernel Tuning for TCP stack.
• Configured Kickstart server to install Red Hat Linux on multiple machines using PXE.
• Installing and updating Kernel, created and modified swap files and added swap space.
• NTP server and client configuration for synchronization of timing of all the server with the NTP server.
• Configuring and Maintaining of Network File Systems (NFS) and Auto mount over the networks.
• Disk Management using different RAID technologies in Linuxusing LVM.
• Worked on account, user and group administration, Permissions policy management and quota implementation.
• Used nslookup, ping, telnet, ipstat, tcpdump and netstat to troubleshoot networking issues.
• Worked in Puppet for a configuration management for admin work, and configuration management tool on DOCKER containers for some scripts.
• Puppet Manifests to provision complex multi-node applications composed of Ruby, Node, Apache, Nginx Passenger, Elastic Search, and MySQL.
• Worked with optimization of server resources, Amazon Elastic Cloud instances and website security, Mule ESB (EAI)/Service Mix, Web services /REST, Chef, and Puppet
• UsingWiresharkto monitor HTTP and other traffic on specific interface to verify the configuration on switches.
• Used packetsniffingtools for investigation of network issues and blocking ACL's during implementation of new services.
• Planned and executed packages and updates installations necessary for optimal system performance.
• Supportday to day activities like File systems management, Performance (monitor and Analysis), System Recovery if there is disaster on the event of crash, minor install, Backup and system job validation, and RCA/incident/Problem management and provide 24x7 on call support.
• Network trouble shooting using 'TRACEROUTE', 'NETSTAT', 'IFCONFIG' and 'SNOOP' etc.
• Installation and configuring the DNS, DHCP servers and assigning IP addresses to client hosts.

Environment: TCP stack, PXE, NTP server, RAID, LVM, nslookup, ping, telnet, ipstat, tcpdump, netstat, Puppet, HTTP, ACL's, TRACEROUTE, NETSTAT, IFCONFIG and SNOOP.

Linux Administrator

Confidential

Responsibilities:

• Installation, administration, implementation, testing and maintenance of complex and heterogeneous networks consisting of Linux (RedHat), Sun Solaris 8/9/10, Ubuntu, SuSE.
• Integration of more than 500 Linux servers to authenticate using Windows Active Directory using Samba.
• Installation, configuration, and management of SAMP (Solaris/Apache/MySql/PHP) and LAMP (Linux/Apache/MySql/PHP) stacks.
• Worked on different VMware products like VMware workstation, GSX/VMware server, VMware player, VMware Converter, ESX server 3.X and ESXi 4.1 Hypervisor on HP server.
• Monitoring CPU, memory, iSCSI disks, disk controllers, physical disk, HW and SW RAID, multipath, file systems, network using the tools NAGIOS and BMC Tools.
• Implemented day to day tasks in RHEL that includes upgrading RPMs, Kernal configuring SAN Disks multi pathing and LVM file system.
• Package management using RPM and YUM.
• 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.
• Extensive knowledge in File & Print Server, IIS, FTP, Terminal Server.
• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, FTP, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.
• Experience in Installing, upgrading, and configuring RedHat Linux 5.x using Kickstart Servers and Interactive Installation.

Environment: SAMP, LAMP. RAID, NAGIOS, BMC, DNS, VERITAS file System, SAN, NFS, SAMBA, LDAP, SSH, FTP, SFTP, SNMP, DHCP.