SUMMARY:

• Linux/Unix system administrator with Over Seven years of experience on RHEL 4.x, 5.x, 6.x, CentOS 4.x, 5.x, Suse, Oracle Enterprise Linux, AIX, Solaris 8,9,10 and VMware vSphere ESX/ESXi environment.
• Experience with Virtualization technologies like installing, configuring, administering VMware ESX/ESXi and Citrix Xen Server. Created and managed VMs (virtual server) and also involved in the maintenance of the virtual server.
• Hands on experience with VMware vSphere ESXi 4.1/5.0/5.1/5.5
• Worked on configuration of networks, router configuration and wireless security, TCP/IP, VPN, Content Filtering, VLANs, and routing in LAN/WAN, Ethernet Port, Patch Panel and wireless networks.
• Experience using various search, text, and file systems. Have used ‘grep’, ‘Sed’ etc.
• Experience in Installing, configuring and maintaining Samba, Web Sphere& Web Logic Application Servers, Nagios and Chef.
• Supported AWS Cloud environment with multiple instances and configured Elastic IP & Elastic Storage and also experience working on implemented security groups.
• Thorough knowledge of Infrastructure & Configuration Management tools likeAnsible.
• Experience in automating, configuring and deploying instances on AWS, and Data Centers, also familiar with EC2,S3, Elastic IP’s and managing security groups, IAM on AWS.
• Worked with Amazon Web Services (AWS) for application migration from hard structure to amazon cloud.
• Implement Devops best tools and practices such as centralized logging(ELK) server monitoring (Nagios) and Automation(Ansible)
• Created Instances and managed various client application in AWS cloud.
• Experience on installation and configuration of various DevOps tools like puppet, Chef and Jenkins.
• Experience in Server monitoring, capacity planning, application monitoring with the help of Nagios, Cacti,
• Worked on day - day tasks; User Administration tasks like adding, deleting and modifying user data and documenting all user data in a centralized location.
• Performance tuning of Linux machines in the environment by kernel parameter tuning, identifying process that hog the system resources and containing them.
• Experience working in customizing the Kickstart and Jumpstart scripts to automate the installation of various servers used for various internal projects.
• Responsible for Backup and Recovery operations of various servers using VERITAS Net Backup.
• Working Knowledge on using and developing Shell, Bash and Perl scripts used to automate day-to-day administrative tasks.
• Responsible for OS maintenance activities like upgrading the OS, updating the services and third party software’s.
• Worked in maintaining integrity of Linux, Unix servers by performing patching operations on a regular and planned way.
• Experience in working with Ansible versions 1.8 & 2.0, Tower version 2.1
• Experience in upgrading Hadoop 1.3 to 2.2 using Ansible.
• Experience in Kerbersiation and De-Kerberisation the existing clusters using Ansible.
• Installation and configuration of Web Application servers like Apache, Tomcat and WebLogic.
• Worked on testing of Linux Environments in the Development/Test Stages to create standardized environment.
• Documented various maintenance activities and upgrades and changes in the network architecture.
• Worked with a bug/problem tracking system in responding to DNS requests, updates and tasks and provided 24X7 on call support on rotation basis.

TECHNICAL SKILLS:

Operating System: Solaris 10/9/8, HP-UX (10.20, 11.00, 11.11, 11.23), IBM AIX (4.3, 5.1L, 5.3L), RedHat Linux (AS/ES 3/4/5), VMware ESX 4.X, Windows NT 4.0/2000/2003/ XP/vista

Hardware: TSeries, MSeries Server, HP 9000 K,L,N class server, IBM RS/6000, pSeries, Xseries, HP/IBM/Blade Servers.

Network Protocols/Services: DNS/Bind, Samba, TCP/IP, NFS, Telnet, DNS, LDAP, SSH, DHCP, NAT, LAN, WAN, ARP/RARP, FTP/TFTP, ifconfig, route, netstat, xinetd, HTTP.

Storage: SAN EMC Symmetrix 800/ DMX1000, 2000 & 3000, EMC CLARiiON 500, 600, 700Databases: MySQL, PostgreSQL, SQLite, DB2, Oracle

Web /Application Server: Apache Tomcat, WebSphere, Web logic

Automation Tools: Puppet, Chef, Kickstart and Ansible

Mail Servers: SMTP, POP, IMAP, qmail, Sendmail, Postfix

Languages: C, C++, Java, Shell, awk, Perl, Bash, Python

Security: SSH, SSL, IPchains, IPtables, Tcpdump.

PROFESSIONAL EXPERIENCE:

Confidential, Lexington, KY

Sr. Linux/UNIX System Engineer

Responsibilities:

• Worked on Building, administering, monitoring and troubleshooting RHEL4.x/5.x/6.x, AIX 6.1 on Dev., test and production environment.
• Involved in production support for multiples applications residing on Linux and Windows environments.
• Processing the work request like build and deploying the codes on UAT, Staging, and Production environments.
• Raised, handled and closed multiple Change Management and Trouble Management tickets accordingly with Standards.
• Deployed Puppet, Puppet Dashboard and PuppetDB for configuration management to existing infrastructure.
• Launching and configuring of Amazon EC2 (AWS) Cloud Servers using AMI's (Linux/Ubuntu) and configuring the servers for specified applications.
• UseAnsibleon ad-hoc and experience writingansibleplaybook. Setupansibleenvironment using ssh key betweenansibleserver and targets.
• Hosting and cutover activities on Amazon AWS/EC2 and on Openstack.
• Implemented AWS solutions using EC2, S3, RDS, Elastic Load Balancer and Auto scaling groups
• Worked with Storage Area Networks (SAN) that consisted of Hitachi and EMC storage.
• Added, removed and resized Logical volumes using LVM in Linux and implementing software RAID at installation time.
• Using Ansible EC2.py for managing AWS instances( Create, destroy and get info of existing instances)
• Deployed scalable mesos cluster in AWS with Ansible and docker.
• Wrote custom Ansible/vagrant scripts to automate building of VM environments for end users.
• Automated, configured and deployed instances in AWS cloud and worked with Amazon EC2, S3 and Elastic IP
• Installed and configured Infrastructure Automation toolAnsible.
• AWS EC2/VPC/S3/SQS/SNS based infrastructure automation through Ansible, Python, Bash Scripts
• Manage configuration of Web App and Deploy to AWS cloud server through Chef.
• Worked on regular disk management, partitioning according to the requirements, creating new file systems or increasing existing ones, managing file systems and adding virtual swap space.
• Configured kickstart server and patched/updated servers using Redhat Satellite server.
• Involved in installation, configuration, and administration of RHEL 5, 6 & Solaris 9, 10 using Kickstart, Jumpstart, custom configuration like package management, and volume management of servers.
• Defined/setup network protocols, Network File Services (NFS), and Network Information Services (NIS) in Linux Environments.
• Performed and reported daily health checks for multiple application servers.
• Created VM instances using VMware/ESX on Linux and migrated applications from others servers.
• Implemented and configured Samba to help with printing and file sharing in the mixed environment.
• Worked on Maintenance level upgrades and software administration RPM installation on Linux.
• Conducted Annual Disaster Recovery exercises for applications on different platforms.
• Worked on Scripting and task automation by Crontab using Bash, and Korn shell scripting.
• Created Bash Shell scripts to monitor system resources and system maintenance.
• Performed administrative tasks such as System start-up/shutdown, and Backup strategy and scheduled cron jobs for job automation.
• UsedAnsiblecookbooks to automate in AWS features like EC2, IAM, VPC, EBS, CloudWatch, Cloud
• Plan and deploy openstack clouds on systems usingMirantisOpenstack deployment and management tool
• Performing O/S and kernel upgrades on Linux servers.
• Performed host based SAN migration on Standalone and Cluster Linux servers
• Troubleshoot backup issues, Perform manual backups & restore using VERITAS Net Backup.
• Documented and maintained the inventory using asset management techniques.
• Provided support for servers on 24x7 rotation bases on different platforms.

Environment: RHEL4.x/5.x/6.x, AIX 6.1, HP BL460, DL 380 Dell and IBM X Series, SAN, LVM, RPM, Tivoli End Point, BMC patrol, WebSphere, VERITAS Net Backup, Puppet, Ansible, Shell and Perl Scripting, BMC Remedy 8.1, 8.1.0x,Openstack.

Confidential

Linux/UNIX Administrator/Engineer

Responsibilities:

• Installed and configured RHEL 4.3, 4.7, 5.1, 5.2, 5.3,6.x and SunOS on Dell and IBM Blade center servers.
• Administered, maintained Red Hat 4.0, 5.0, 6.0 AS, ES, Troubleshooting Hardware, Operating System Application & Network problems and performance issues
• Installed and upgraded Redhat Linux, firmware, failed hardware and system support software Dell PowerEdge Servers.
• Proposed solutions, and migration plan; worked with stakeholders to validate/accept, and wrote the automation to migrate hosts from ESX, existing Openstack clusters, and AWS.
• Extensive experience working on performance monitoring with SAR, Iostat, VMstat, MPstat and Other Tools.
• Worked on Disk Space management using VERITAS Volume Manager.
• Installed VMware ESX server on Dell Servers and configured Red Hat Linux 5.x, 6.x virtual machines for various applications.
• Involved in configuration of Hardware and Software RAID, Disk replacement and File system recovery. Implemented Virtualization using VMware in Linux on HP-DL585.
• Created Servers, User mappings and Nicknames to access DB2 and Oracle databases.
• Installation of software packages and checking the integrity of the installed packages. Installed different RPM Linux 4.0/5.0.
• Experienced in administration, Deployment, Automation of configuration management tool such as Puppet, chef andAnsible.
• Used Openstack and AWS cloud services to launch Linux and windows machines, created security groups and written basic Powershell scripts to take backups and mount network shared drives.
• Administered Linux servers for several functions including managing Apache/Tomcat server, mail server, MySQL database, and firewalls in both development and production
• Integrated UNIX file systems using packages like SAMBA. Sett up printers on UNIX / NT machines to work seamlessly across platforms.
• Configured and administered firewall rules to effectively monitor system files, port security, and network traffic activity coming through the firewall.
• Implemented OpenLDAP in enterprise environment, created user mailboxes, modified various user attributes in LDAP/LDIF
• Deployed latest patches for Sun, Linux and Application servers,
• Installed and configured Sudo for users to access the root privileges.
• Extensively worked on troubleshooting critical hardware and software issues and other day-to-day user trouble tickets; maintaining email servers as well as Installing and setting up Oracle9i on Linux for the development team.
• Responsible for backup of all servers, and recovery of servers.
• Managing Cronjobs, batch processing and job scheduling.
• Supported and in-depth troubleshooting of Linux/Unix systems 24 x 7 Environment

Environment: Linux, VMWARE, IBM 8677, IBM Blade center Servers (HS20, HS21), Lenovo workstation’s (D2, D10, D20), IBM P570, P575, P595, IBM IntelliZpro-9228, MAC pro workstation’s, DELL PowerEdge 2950,6400, NFS, NIS, DNS, PICS

Confidential, Bentonville, AR

System Administrator (Linux/Unix)

Responsibilities:

• Installation, Configuration and upgrade of Redhat Linux (4.x, 5.x), SUSE, Solaris and HP-UX Operating Systems.
• User Administration, management and archiving.
• Configuring NFS, NIS, NIS+, DNS, Auto Mount & Disk Space Management on Linux SUN Servers.
• Monthly security patches deployment on 200+ Linux test and production servers.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
• Expertise in performing firmware and operating system patching.
• Responsible for building / maintaining a production environment
• Checked and done the patch upgrade and Firmware upgrade for each migration server as and when required.
• Experience in Configuring and Managing Virtual Disks, Disk Mirrors & RAID Levels.
• Worked with NAS Storage with HBA card configuration.
• Cloud computing: Worked with OVF "Open Virtual Machine Format" supported tools Virtual Box, Redhat Virtualization (XEN), and VMware Workstation.
• Excellent Knowledge in Capacity Planning and Performance tuning.
• Activities include user administration, startup and shutdown scripts, crontab, file system maintenance and backup scripting and automation using shell scripting (BASH, KSH) and Perl for Redhat Linux systems
• Experience with VMware Virtualization using ESX hypervisor of VSphere 4.0.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat, Web Sphere and JBoss servers in AIX, and Linux environment.
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure.
• Setting up JBoss cluster and configuring apache with JBoss on Redhat Linux. Proxy serving with Apache. Troubleshooting Apache with JBoss and Mod jk troubleshooting for the clients.
• Installed Oracle, Dev framework, JBoss and several other policies on several production servers Via HPSA.
• Experience with setting up Linux servers for Oracle Real Application Clusters and configuring SAN based devices for raw and File system mount points.
• Troubleshooting and analysis of hardware and software failures for Redhat Servers, Backup Servers and work with different vendors (HP, EMC, Oracle, Redhat) to resolve the issue.
• Extensively worked on Installation of Single-Server and Distributed IBM Filenet P8 Platform System.
• Expertise in Performance Monitoring and Performance Tuning using Top, prstat, sar, vmstat, ps, iostat etc.
• Scheduled run jobs in Autosys, at, and crontab. Analyst productions and support over 100 users. Maintain disk space, delete core file and clean old files system every month end.
• Expertise in creating and managing Logical Volume Manager in AIX, HP-UX and Redhat Linux.
• Server Consolidation and Migration of Applications on Oracle Enterprise and Java Applications.
• Experience in building Production Servers and validation for new build releases.
• Experienced in Monitoring system Access and Monitoring servers by using tools like Tivoli, HP Openview and Nagios.
• Sendmail configurations and administrations, securing the mail servers.
• Expertise in Volume management, Disk Management, software RAID solutions using Veritas Volume manager.
• Creating File System, managing & checking data consistency of the File System.
• Setup and configure Veritas NetBackup 5.x, 6.x and 6.5x Net Backup server / client & tape libraries.
• Troubleshooting hardware, software and operating system related errors on Linux including Hardware Maintenance and Upgradation.
• Installation of Packages and Patches for AIX, Solaris 8/9/10, Redhat Linux 4/5, HP 11.X.
• Disk and file system management through Veritas Volume Manager / Veritas File System and Solstice Disk Suite.

Environment: Redhat (2,3,4,5), VMware ESX 4.x and SUSE Linux, Solaris 8 / 9 / 10, IBM Filenet P8, IBM RS/6000, pSeries Server, NetBackup 5.0, Veritas Volume Manager 4.x/5.0, SAN EMC Clariion CX 700/ CX 600/ CX 500, EMC DMC 2000/ 3000

Confidential, Austin, TX

Linux/UNIX Administrator

Responsibilities:

• Extensively worked on Installation, Configuration & Upgrade of AIX, HP-UX, Linux operating systems.
• Managed Users for AIX and Linux Servers and assigned rights to access network resources
• Experience with VMware Virtualization using ESX hypervisor of VSphere 4.0.
• Performance monitoring and Tuning using top, prstat, sar, vmstat, ps, iostat etc.
• Configuration of VERITAS Cluster Server, Service Guard from the scratch and maintained service group/packages for failover and redundancy purpose.
• Configured kickstart server and updating/applying patches to the servers using Redhat Satellite server.
• Configured and maintained network services such as LDAP, DNS, NIS, NFS, Web, Mail, FTP
• Implemented RAID 0/1/5 for creation of logical volumes using VERITAS Volume Manager in SAN Storage Area Environment
• Experience in patching with live upgrade/standard install cluster and applying firmware.
• Administrated NFS, NIS, DHCP and DNS Samba services running on AIX, Sun Solaris and Red Hat Linux.
• Managed Network troubleshooting applications TCP/IP including Ethernet, IP addressing & Sub netting, routing.
• Creating virtual machines using Xen hypervisor on Xen servers, installing Redhat, CentOS using kickstart.
• Used shell scripting to automate tasks on Solaris and Linux and automated jobs using Crontab.
• Provided 24x7 on call and remote support for UNIX Production Problems and responding to users' tickets from Remedy.
• Worked with Storage team to configure EMC SAN, NAS configuration.

Environment: Redhat Linux, Solaris 9/8/10, HP-UX 11.0, VMware ESX 4.x, Ultra Enterprise 2/1 Servers, SPARC server 1000, SPARC server 20 Enterprise Servers, SPARC server 1000/20

Confidential

Jr. Linux Systems Administrator

Responsibilities:

• Worked on administration and maintenance of Red hat Linux
• Installation of VMware ESX 3.5.x 4.0x infrastructure on Dell Power Edge Server and administration of VMs
• Worked on User administration setup, maintaining account, Monitor system performance.
• Worked with user administration; startup and shutdown scripts; crontab, file system maintenance, backup scripting and automation using Perl, shell scripting (bash, ksh) for Red Hat Linux systems.
• Manage logical Volume manager on Red hat Servers.
• Troubleshooting day-to-day server related issues and problems in terms of operating system, applications and network
• Maintained and monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues
• Experience in installing, integrating, tuning and troubleshooting Apache and Tomcat application server.
• Worked with system Software installation and configuration of NFS shares, Auto-Mounter, DHCP and LDAP
• Configuring, administering and troubleshooting of NFS, AutoFS (Direct and Indirect Maps), NIS (master, slave and client) and DNS in multi-platform networks.
• Experience in Shell scripting bash to automate system administration jobs

Environment: RHEL 4/5, IBM AIX 4/5, AIX 4.x, Hitachi 9980v, ESX 4.x, kickstart, usfdumpWeb Sphere, Web Logic, JBoss, Tomcat, DNS, netstat, lookup, DIG, SMTP, MYSQL, RDBMS, Bash