SUMMARY

• Linux Systems Administrator with 7+years of experience in designing & implementing server infrastructure and data center operations across Unix, Linux, and VMware Platforms.
• Managed physical and VM running on SUSE, AIX & Red hat Servers.
• Installation, Configuration, Maintenance and Administration of systems in the environment.
• Operating Systems (OS) installation / re - installation, upgrades and patches for Servers, Apply OS patches and upgrades on a required basis and upgrade administrative tools and utilities.
• Perform OS level patch installation, package installations & upgrades using Satellite Server.
• Day to day troubleshooting and resolving software or OS based issues on systems such as performance, configuration, connectivity, network issues etc.
• Experienced on User & Group administration, Create, Modify, Delete User Profile as per request.
• Extensively worked with Business, Application, Database, Network and SAN Team for project requirements.
• Experienced on File Systems Creating, Modifying, Identifying the utilization of File systems, File system Exporting & Mounting.
• Changing File& Directories Permissions and Creating Soft & Hard Links as required in environment.
• Knowledge on the booting process of Linux.
• Knowledge on different RAID levels.
• Worked with File System includes LINUX, Network file systems, running fsck and troubleshooting on file systems to resolve file system corrupts.
• Root password recovery and Troubleshooting L1, L2 and L3 issues.
• Experienced in scheduling jobs using cron and at jobs.
• Experienced in Performance tuning utilities like iostat, sar, vmstat, top.
• Cleaning log files and compress old logs on OS File Systems.
• Experienced in troubleshooting and resolving Storage related issues on the servers.
• Part of Multiple DR exercises as conducted every year to perform system recovery.
• Worked on Firmware Upgrades Including Vulnerability Remediation.
• Tracking all the Incidents and Tasks through ticketing tools such as Service Now & JIRA.
• Worked for large Data centers spanning more than 2000+ servers spread across in 24x7 Production and On-Call environment.
• Effective team player with an aptitude to learn and ability to prioritize, organize and accomplish multiple tasks, as part of a team or independently.

TECHNICAL SKILLS

Operating Systems: RedHat, CENTOS, IBM AIX, SLES, Windows.:

Hardware: CISCO UCS:

Networking: TCP/IP, DNS, DHCP, Samba, SSH.:

WEB Technologies: Tomcat, Apache, Jboss & WebSphere.:

Programming, Scripting Language & Databases: Shell scripting, PERL, C, C++.:

Storage & Backup Management: NetApp, Hitachi, Commvault.:

Monitoring: Nagios, SolarWinds, ScienceLogic:

Other Tools: Ansible Automation Platform, Ansible Tower, RH Satellite, SharePoint, V-center:

Ticketing Tools: Service Now & Jira:

PROFESSIONAL EXPERIENCE

Confidential, Nashville, TN

Sr. Unix/ Linux Admin

Responsibilities:

• Installation & Configuration of Red Hat Enterprise Linux, AIX & SUSE OS.
• Maintenance & System Administration & configuration management to existing infrastructure.
• Implemented and maintained services running on Linux server platforms & in Azure Cloud VM’s.
• Installed and configured Linux/Unix operating systems on VMware server.
• Deployed new tools as per application team’s requirement across all OS.
• Wrote scripts to automate day to day admin jobs.
• Administered and Configured Logical Volume Manager which involved the creation and modification of file system.
• Performed upgrade/downgrade on Red Hat Linux whenever required.
• Performed hardware and software installations, upgrades, maintenance, patch administration and kernel modification/upgrades.
• Backend Solution, Day to day Sysadmin & Monitoring, File sys mgmt.& disk mgmt.,
• Responsible for maintaining security on all UNIX systems for regulatory compliance.
• Implementation and troubleshooting of network services like NFS, FTP, NTP, Telnet, SSH.
• Configuring and managing NFS, autofs and FTP.
• Configured and deployed multiple VM’s using vSphere client.
• Performance analysis on all application & production servers.
• Developed multiple shell scripts for system monitoring.
• Monitored server and application performance & tuning via various stat commands (top, sar, iostat, vmstat, netstat, mpstat, prstat, nfsstat, prtconf, prtdiag, iostat, top, printmgr, hpimliview, dmidecode, smc etc) and tuned I/O, memory etc for AIX and RHEL Servers.
• Configured LDAP Server and LDAP Client on Linux machines for authorization and authentication.
• Worked with TCP/IP network configuration.
• Part of Multiple DR exercises as conducted every year to perform system recovery.
• Expertise in handling crisis during heavy load on servers and maintaining zero downtimes.
• Working in war-room’s, providing continuous technical support throughout release and production period.

Environment: Red Hat Enterprise Linux, AIX, SUSE, Windows, VMware, Shell-Scripting, RH Satellite, SUSE Manager(SUMA), Ansible Tower, Centrify, Solar-Winds.

Confidential, Nashville, TN

Unix/ Linux Admin

Responsibilities:

• Installation and configuration of RedHat Enterprise Linux environment.
• Write a kickstart profile according to service requirements and install the OS with kickstart.
• Configure and implement OS level virtualization with VMware.
• Configure local file system for the system according to service requirements.
• Configure single/multiple network interface for network connectivity configure network file system for service requirements
• Install and update software/applications with yum utilities
• Implement local/remote user authentication service (Active Directory)
• Implement name regulation service for the system (DNS)
• Implement system security through SE Linux and iptables.
• Installation and configuration of AIX environment:
• Design, implement, and maintain large-scale environments of Unix/ Linux servers, backup systems, and the associated software and hardware to ensure maximum performance, efficiency, scalability, and availability.
• Configure UNIX/ Linux environments.
• Install and maintain Version controlling server for development environment.
• Install, configure, tuning, and support WebLogic, JBoss, Tomcat and Apache servers for test and production environment.
• Install third party packages according to the Application requirement
• Administer tools for Repository creation and maintenance of accounts using tool upgrades and end user support for SVN.

Environment: Red Hat Enterprise Linux, AIX, SUSE, Windows, VMware, Shell-Scripting, Active Directory, Nagios, Science Logic, RH Satellite, Ansible Tower.

Confidential, Cary, NC

Linux Admin

Responsibilities:

• Linux Administrator working in a server Enterprise facility. Provided support for more than 700 Red Hat, CentOS servers.
• Installing and updating packages using YUM (custom YUM servers/repositories).
• Managed Red Hat servers using spacewalk to install and update systems.
• Configured and deployed patches, upgrades, bug fixes on both physical and virtual Red Hat Linux servers using satellite server.
• Implemented rapid provisioning and life cycle management for Red Hat LINUX using kickstart.
• Proficient in providing support on the deployed Red Hat Enterprise Linux & AIX servers from both operating system level and application Level.
• Expertise in configuring Red Hat Cluster Nodes for any legacy applications and verified the daily health check on the Cluster Nodes.
• Expertise in creating VM Templates, cloning and managing Snapshots.
• Expertise in working with MySQL databases, Apache Web server, Tomcat Application Servers.
• Configured and Administered Apache, VSFTPD services, MYSQL and Tomcat.
• Troubleshooting any performance or configuration issues with MySQL and Oracle.
• Expertise in hardening, Linux Server and Compiling, Building and installing Apache Server from sources with minimum modules.
• Monitoring and troubleshooting of backups and schedule Cron jobs.
• Experience in scripting using BASH & PERL
• Worked on Mail Server, Samba Server, and Apache Server.
• Worked on configuringNIS, NFS, DNS, DHCP, FTP, FSTP, Telnet and RAIDlevels.
• Extensive experience in network managementTCP/IP, NIS, DNS, NFS, VLAN.
• Experience in configuring monitoring tools like Dynatrace.
• Experience in deploying several sets of Linux guest builds from VMware templates.
• Experience in deploying RHEL 5.x, 6.1 in a blade environment.
• Patch management of servers and maintaining server's environment in Development/QA/Staging/Production.
• Resolving assigned remedy tickets and remedy tools in Development/QA/Staging/Production.
• Participating in 24x7 production on-call support of Linux and providing technical support to users.

Environment: Red Hat, CentOS, IBM AIX, MySQL Database servers, Cisco UCS, VMware.

Confidential

Unix/Linux Admin

Responsibilities:

• Supported Unix/Linux servers in Production/QA/Development Environment includingAIX and RHEL VM's.
• Installation, configuration, troubleshooting Red Hat, Cent OS, AIX Servers.
• Installation of systems using Kickstart for RHEL.
• Configure, support and perform routine maintenance of hardware and software for Linux andSolarisservers.
• Automation of various administrative tasks on multiple servers using Puppet.
• Deployed Puppet, Puppet Dashboard, and Puppet DB for configuration management to existing infrastructure.
• Proficient in installation, configuration and maintenance of applications like Apache, LDAP, PHP
• Involved in installing and managing different automation and monitoring tools on Red Hat Linux.
• Resolved config issues and problems related to OS, NFS mounts, LDAP user ids DNSand issues.
• Experience in creation and maintenance of ZFS file systems / set quotas.
• Regularly applying patches for Red Hat Linux,Solaris systems.
• Develop Unix Shell scripts for regular and periodic jobs and for sysadmin jobs.
• Extensively worked with Business, Application, Database, Network and SAN Team for project requirements.
• Project coordination and providing technical advice on system to management
• Plan, document, review and maintain system administration guidelines and policies
• Manage and coordinate Unix and Linux administration tasks
• Ensure Data Center operation meets required service levels
• 24x7 support for the UNIX servers. Rotating on call pager responsibilities for Production environment.
• Delivering 24x7 production support on mission critical servers running on Linux Environment
• Linux OS patching through satellite server.
• Installing, configuring and maintainingApache, samba,WebSphere& Web Logic Application Servers and Nagios.
• Firmware Upgrades Including Vulnerability Remediation
• Tracking all the Incidents and Tasks through ticketing tools such as Service Now, Remedy, JIRA & Maximo.
• Day to day troubleshooting and resolving software or OS based issues on systems such as performance, configuration, connectivity, network issues etc.
• Troubleshooting Hardware based issues on systems such as disk issues, memory, CPU issues liaising with vendors (Oracle, HP) for hardware related issues.
• Checking the file system alerts and creating the file system as per requirement.
• User administration, creating Users, Groups and giving permissions as requested.
• Managing customer service operations for rendering and achieving quality services, ensuring compliance with Service Level Agreement
• Coordinating with the application team and ensuring the application in the servers are running smoothly

Environment: AIX, RHEL, VMware, Veritas Cluster server (VCS), VMware, Perl, shell Scripting, Cisco UCS.