SUMMARY

• A results - driven and technically adept IT professional offering Over 8 years experience excelling in Linux Systems Administration.
• Expertise to handle tasks in RedHat Linux includes upgrading RPMS using YUM, kernel, HBA driver, configure SAN Disks, Multipathing and LVM file system.
• Maintain and use Red hat Kickstart servers and NIM Master for installs and upgrades. Plan and implement service updates and Patch Administration.
• Expertise in file system concepts like LVM, VxVM, creating new file systems, increasing and decreasing file systems, mounting file systems, un-mounting file systems and troubleshooting Disk space issues.
• Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• Handling and generating tickets via the Remedy ticketing tool.
• Good Solid understanding of OSI model, layers and various protocols like TCP/IP,
• UDP, TLS, SSL, HTTP, HTTPS, FTP, SFTP, SMTP, SSH.
• Experienced in supporting database systems including Oracle, DB2 on Linux and Solaris Environment.
• Extensive experience in installing, integrating, tuning, and troubleshooting Apache, Tomcat and Websphere.
• File system management using VxFS and ZFS.
• Worked with monitoring tools like Nagios, Introscope and splunk.
• Efficiency in installing, configuring and implementing the RAID Technologies using various tools like VxVM and SVM.
• Experience with backup technologies like Tivoli Storage Manager 5.x, 6.x and Veritas Netbackup 4.x, 6.x, 7.x and EMC Networker v7.
• Proficient in Installation, configuration, and maintenance of open LDAP server and application integrated with Apache Web server and Postfix mail server for user authentication.
• Strong Experience in Weblogic 5.1, 6.1, 7.0, 8.1 and 9.1, 9.2 Application Server and experience in Weblogic 6.1, 7.0, 8.1, 9.1, 9.2 Clusters.
• Coordinated with SAN Team for storage allocation and Disk Dynamic Multi pathing (DMP).
• Configured & installed ALOM (Advanced Lights Out Manager) & Load Balancer, JBoss including installation, configuration, management and troubleshooting.
• Providing 24/7 technical support to Production and development environments.
• Excellent client relation skills and the drive to complete tasks effectively and efficiently where customer services and technical skills are demanded as well as the ability to communicate effectively with all levels of management and the client community.
• Strong analytical, diagnostics, GFS2 performance troubleshooting skills to consistently deliver productive technological solutions.

TECHNICAL SKILLS

Operating Systems: Linux-Red Hat, Fedora, SUSE, Debian, Ubuntu, CentOS, Unix-IBM-AIX, Sun Solaris, and HP-UX Windows - NT/ 2000/2003/2007 Server/XP Pro/Vista/7.

Backup and Recovery tools: Dump, Restore, Tar, CPIO, Rsync, Kernel re-compilation & Patches update, Kickstart Installation; Firewalls: IPTables; SELinux; ACLs

Hardware: DELL (PowerEdge), HP (ProLiant G7 & G8), IBM BladeCenterSun-Fire X-series and T-series Enterprise Servers

Tools: Weblogic 10.x/9.x/8.x, Websphere, Apache HTTP/Tomcat/Jboss, VERITAS Volume Manager, VERITAS Net backup, PMX, Cluster server 3.5 & 4.1, Sun Cluster 2.x & 3.x, Nagios, Introscope, Splunk, New Relic.

Languages: Shell scripting, Perl, Python, C, C++, JAVA, C#

Networking: TCP/IP, NIS, NFS, DNS, DHCP, LAN, FTP/TFTP, SSH, SFTP, ARP

RDBMS: ORACLE, MySQL, PostgreSQL and MS SQL Server

Storage: LVM, SCSI, SATA, Ext 2, Ext 3, Ext 4 and NAS (NFS, SAMBA, RAID 0/1/5) and SAN (iSCSI, FibreChannel) NetApp filers.

PROFESSIONAL EXPERIENCE

Confidential, Richardson, TX

Sr. System Administrator/Devops Engineer

Responsibilities:

• Provided system support for servers of Redhat Linux including routine maintenance, patching, and system backups and restores, and software and hardware upgrades.
• Worked on building new Redhat Linux servers, support lease replacements and implementing system patches using the Chef Automation tool.
• Worked on Confidential &T integrated cloud using Openstack.
• Configuration, implementation and administration of Clustered servers on Redhat Linux environment.
• Worked with configuration management tools like chef and puppet.
• Coordinate/assist developers with establishing and applying appropriate branching, labeling/naming conventions using GIT and Subversion (SVN) source control.
• Experience with Jenkins.
• Automate builds and deployments using Python and shell scripting.
• Monitoring Live Traffic, logs, Memory utilization, Disk utilization and various other factors which are important for deployment.
• Experienced in system administration, System planning, co-ordination and group level and user level management.
• Expertise in creating and managing Logical Volumes in Linux.
• Experience on backup and recovery software like Net backup on Linux environment.
• Systems and network Planning and Administration.
• Handling and generating tickets via the BMC Remedy ticketing tool.
• Supported production systems 24 x 7 on a rotational basis.
• Understanding of Microsoft System Center: Creating and Implemented Changes on servers and documented the change in the Microsoft System Center for future reference.
• Expertise in Installation, Configuration of Package and Patch Management.
• Worked with performance monitoring tools like Wily Introscope and New Relic.
• Monitoring of servers using Nagios tool, which is used to ensure systems application and services are functioning properly.
• Experience in troubleshooting production issues using Splunk.
• Developing UNIX korn shell scripts for data manipulation and process automation.
• Expertise in Performance Monitoring and Performance Tuning using Top, prstat, sar, vmstat, ps, iostat etc.
• Creating new file system, managing & checking data consistency of the file system.
• Problem determination, Security, Shell Scripting.
• Supported after-hours to meet deadlines as well as for operational support as required.

Environment: REDHAT Linux 5, 6; Git, Chef, Nagios, Splunk, New Relic, Jenkins, Openstack, BMC Remedy, Python, Logical Volume Manager, Vmware Vsphere 4.1 and 5.1, Vmware ESX 5.5, Microsoft System Center, IBM Storage and NetBackup Storage.

Confidential, Irving, TX

Linux Administrator

Responsibilities:

• Performed installation, configuration and maintenance of Redhat Linux 4.x/5.x/6.x
• Excelled on Linux kernel, memory upgrades, and swap area. Redhat Linux Kickstart Installation. Configuring DNS, DHCP, NIS, NFS in Redhat Linux other Network Services.
• Performed daily backups, restoration of data as per requests from developers using Veritas Netbackup.
• Veritas File system and Veritas Volume Manager 2.5 are used to configure the RAID 1 and RAID 5 Storage Systems.
• Experience in Servers consolidation and virtualization using VMware virtual infrastructure, VMware ESX.
• Wily Introscope installation and configuration of agents.
• Wrote Shell Scripts as cron jobs and deployment scripts for various reasons.
• Mounted Disks allocated from the SAN (Clarion) for Linux and Solaris servers. Installed new and removed bad HBA cards from the server. Moved the Volumes from CX600 to CX700 to increase storage capacity.
• Provided application support for Weblogic application srvers as required.
• Network trouble shooting using ‘ndd’, 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc.
• Installed of all the required Software, patches, documentation, licensing trouble shooting.
• Maintain syslog files. Shell scripting and Perl scripting to automate daily assignments.
• Implemented effective Unix monitoring with NAGIOS.
• Troubleshoot network & DNS issues and handled VERITAS Netbackup server & client connectivity problems.
• Resolved Security Access Requests via Peregrine Service center to provide the requested User access related requests.
• Monitored overall system performance, performed user management, system updates and disk & storage management.
• Created users, manage user permissions, maintain User & File System quota on Redhat Linux.
• Production support of Apache and JBoss including installation, configuration, management and troubleshooting.
• Setup of full networking services and protocols on UNIX including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, kickstart and print servers to insure optimal networking, application, and printing functionality.
• Installed and configured Sudo for users to access the root privileges.
• Written Technical documentation for various projects and worked with Technical writer to finalize the documents.

Environment: Redhat Linux 4.x, 5.x, 6.x, CentOS, VMware ESX Server 3.5.0, JBOSS, Remedy, EMC Power Path, windows 2003/2007/XP/VISTA/7, Solaris 8,9,10, Solstice Disk Suite, AIX 6.1, 5.3, Veritas Cluster Server, Enterprise Security Manager, Opsware, Weblogic 8.1, Oracle 10g/11g.

Linux Administrator

Responsibilities:

• Installation, Upgrading and deployment of Linux Operating system, Sun Solaris Operating System on X-86 based HP BL460 G5, G6 and G7 Hardware and SUN Enterprise servers.
• Installed, configured and administered AIX 4.3.3, 5.1 & HACMP 5.1.
• Installation, Configuration and Administration of VERITAS Storage Foundation Suite, VxVM, VxCS and Vxfs for Solaris and Linux Servers.
• Installation and support of various applications like Weblogic server 10, WebSphere 6.1 JBoss 4.x, Apache 2.x, Oracle 9i, 10g, Mysql, Informatica Power center 8.
• Installed Apache Http server for Kickstart setup and repository setup for all the Linux clients Servers to download packages and Linux upgrade.
• Integrated different Applications like websphere, weblogic, MQM, Oracle, DB2, Sybase and third Party applications in to VCS resource groups for Auto start and stop of the Applications through VCS.
• Implemented VCS triggers to trigger events in the cluster nodes, up on online/offline different Critical resources like disk groups and Applications.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
• Configured and administered Lpar’s/DLpar’s.
• File system tuning, growing and shrinking with VERITAS File system 4.x/5.x (Vxfs).
• Configuration of Kernel parameters as per application requirement.
• Associated with bank infrastructure management and BMC support team while deploying the Linux servers for cloud infrastructure.
• Associated with DBAs for installation of Oracle database and Sybase on Linux and Solaris servers.
• Network monitoring using NAGIOS tool.
• Written Shell and Perl Scripts for System Administration tasks.
• Providing regular status updates on project.
• Organizing DR (Disaster Recovery) server tests to make sure the infrastructure is correct and the DR servers are working as expected as in production servers.
• Worked with storage teams to split the R1 and R2 disk groups to enable the SAN disks to read/write mode on DR servers and worked with DBA’s and software system analyst to troubleshoot and testing the functionality of their applications o both Prod and DR servers.
• Manage systems using remote consoles like ILO for HP Hardware and HMC for IBM P-series.
• Implementation of SSH for secure transfers and implementation of PKI between servers to enable password less logins between servers.
• Worked on DNS, NIS Master Slave Servers along with required clients.
• Involved in Design review meetings and co-ordinate with application team, BSOL and L&P.
• Worked on scripting using shell, bash and korn.

Environment: Red Hat Enterprise Linux 5.x, AIX 4.3, 5.x, HACMP 5.1, VERITAS Volume manager, Solaris 9,10, VERITAS File System, VERITAS Cluster Server 5.1, VMware ESX sever 4.0, LPAR, DLPAR, HP Proliant servers BL460, BL685, IBM P550, P590, Enterprise scheduling Product, Tivoli Storage Manager.

Confidential, Torrance, CA

Linux Administrator

Responsibilities:

• Responsible for supporting Linux System Administrator customers with RHEL/Ubuntu operating systems questions and problems via telephone, FAX, and email.
• Experience with VMware Virtualization using ESX hypervisor of Vsphere 5.1.
• Handled all system administration duties for all Red Hat Linux and VM Servers on site.
• Responsibilities ranged from daily tasks to more advanced ones such as shell scripting, software installation and system/network troubleshooting.
• Responsible for the Server Administration tasks in the web & server support areas Installed and Configured Web, Application and Mail servers. Wrote shell scripts for automating tasks.
• Successfully Migrated virtual machines from legacy Virtual environment Vmware Vsphere 4.1 to new Vmware Vsphere 5.1.
• Monitored the file systems and CPU load for better performance.
• Automated Time Monitoring on Servers through shell script and added checkpoint to ensure the script is running via crontab entry; setup mail alerts also.
• Analyze and suggest corrective methods on performance issues.
• Package and patch administration.
• Adding additional and extension of existing File systems using VxVm and Vxfs.
• Done with LAMP Setup in Ubuntu. Also MySQL setup, Performance Tuning,
• Replication, Commands, Backup and overall Administration. Tuned servers for maximum efficiency for Oracle and MySQL Data Bases.
• Performed workstation and server installations and upgrades, standardized workstation configuration, automounter, send mail, and hardware upgrades; administration support and troubleshooting duties in a 24x7.

Environment: Red Hat Linux 3,4 Sun Solaris 8,9,10 Sun V440, V 20 T5240 Sparc stations 20, Switches, VMware ESX 5.1, oracle 11, Veritas Cluster Server 5, Veritas Operations Manager.

Confidential

Linux System Admin

Responsibilities:

• Configured IBM RS 6000 for production, staging and test environments.
• Installation and configuration of Red Hat Linux and NT servers.
• Installation of patches, security fixes, e-fixes, packages on AIX, Sun Solaris, Linux and Windows NT/2000 Servers.
• Update latest patches and upgrade all applications to the latest versions.
• Configuring Windows 95, 98 and NT workstations in NT domains
• Setup LAN consisting of ten RS-6000 Servers running AIX 4.3, 5.0, 5.1, and five Solaris Servers.
• Maintained the local Apache web server running on a Solaris server.
• Supporting the network on connectivity issues relating to TCP/IP, IPX, and AppleTalk.
• System Administration and engineering of Windows NT\2000, Active Directory Administration.
• Administering user accounts: Adding users, user-groups, removing users & groups and changing user environments.
• Migrated database applications from Windows 2000 Server to Linux server.
• The primary responsibilities of the job include monitoring all the Windows NT servers verify
• Everything in sync and Confidential optimum performance and take proactive measures to reduce the Downtime.
• Troubleshooting of DNS and DHCP related problems.

Environment: Red Hat Linux 3.0, IBM AIX 4.3.3, SUN Solaris 2.6, NT/2000, MS Operating System, DHCP, DNS, Apache, User Management, Network Management.