SUMMARY

• IT professional with over 7 years of experience working as a LINUX/UNIX Systems Administrator with expertise in Red - hat Linux 4.x, 5.x and 6.x, SuSe, Ubuntu, Cent OS Solaris 8.x, 9.x and 10.x. HP-UX 11.x, AIX 5.x and 6.x, Windows, Tomcat, JAVA, J2EE Applications and SQL. Exceeded the project goals with exceptional management skills, excellent business understanding and strong communication skills.
• Worked on installation, configuration, maintenance and troubleshooting of Red Hat Linux 6.x, 5.x, 4.x, Ubuntu, Cent OS, SUSE Linux, AIX, Solaris and windows servers
• Strong experience in troubleshooting, monitoring, and 24/7 production support in mission critical environments.
• Worked with systems support team to define, architect and maintain highly available production systems.
• Expertise in Installation, Configuration, Integration, Tuning, Backup, Crash recovery, Upgrades, Patching, Monitoring System Performance, System and Network Security and Troubleshooting of Unix Servers.
• Experience in implementing and monitoring High Availability environment using VERITAS Cluster Server, Sun Cluster and Red hat Cluster Configured and used Jump start and Kick start to install OS.
• Strong experience in VERITAS Clusters in supporting high availability mission critical servers.
• Experienced in installation, configuration and volume/File system management using VERITAS Volume Manager (VxVM), Logical Volume Manager (LVM) Backup management and recovery policies using VERITAS Net-Backup.
• Experience in creating physical volume, logical volume, and volume groups using LVM’s in Linux/AIX.
• Proficient in Networking, configuring TCP/IP, DNS, NFS, NIS, NIS+, SAMBA, LDAP, SSH, SSL, SFTP, SMTP, SNMP.
• Worked on installation of VMware and monitored Virtual environments with ESX4, 5.x servers and Virtual Center 2.X .
• Worked on Storage Area Network (SAN), EMC Symmetrix DMX, EMC Mirror View, HP storage and Hitachi data storage.
• Expert in Installation and configuration of Patches and Packages.
• Expensive experience on Puppet and Chef Configuration management.
• Proficient in Installation, Configuration, Support & Maintenance of various SunSparcEnterprise hardware’s and RedHat5.x, 6.x Linux Servers located at Remote Locations.
• Experience in providing day-to-day user administration like adding and deleting users and managing users queries.
• Worked on package and configuration management using Puppet and Chef.
• Excellent in System performance tuning, configuration and sound understanding of IT Infrastructure Administration with project management skills.
• Worked on 24/7 technical support to Production environments and Experience in configuration and testing Disaster Recovery Site.
• Experience in writing Shell/Perl Scripts.

TECHNICAL SKILLS

Hardware: SUNEnterprise- E 5000/5500/6500 , SUNFIRE 3800/4800/6800 , E10K/15KSeriesServers, HP-9000, rx8640, rp7420, rp8420, N-Class, L-Class, D-Class, K-Class, IBMe-ServerRegattaP690, P570, RS6000, IBM/HP/DELLBladeServers, SAN(EMC, Hitachi), NAS (NetApp)

O / S: RedHatLinux (RHEL 3.x/4.x/5.x/6.x), Solaris 10.x/9.x/8.x, HP-UX (11.x), IBMAIX (5.x), Windows.x

Naming Services: DNS, NIS, andNIS+

Backup Management: VERITAS Netback up 4.x/5.x/6.x,UFS dump, UFS restore, TAR, DD, CPIO

ScriptLanguages: Shellscripts, PERL

Web Technologies: Apache 2.x/3.x, IPLANET 4.x/5.x, WEBLOGIC 8, Web sphere 4..x/5.x

Storage: SAN, EMC Symmetrix / Clarion, iSCSI, SNAP, NAS, DAS

Third Party Software: VERITAS VolumeManager, LVM, LDAP, SSH, Puppet

Cluster: VERITAS Cluster Server (VCS), Sun Cluster, Red Hat Cluster Suite, AIXHACMP

RDBMS: Oracle, MYSQLServer

Protocols: NetBIOS, NetBUI, SMTP, SNMP, ICMP, TCP/IP, FTP, TELNET, UDP&RIP, DNS, WINS, DHCP.

Remote Access Tools: TerminalServices,NetMeeting,Web - Ex,PC Anywhere & VNC for WindowsServers.

PROFESSIONAL EXPERIENCE:

Confidential, AZ

Linux Administrator

Responsibilities:

• Extensive experience on installation, configuration and maintenance of AIX, SLES, CentOS, UBUNTU, AIX in Test, development and production server
• Responsible for installation (using kickstart), configuration and administration of RedHat Enterprise Linux4.x/5.x and RHEL 6 at other data center over network.
• Administered and maintained Redhat 4.x/5.x, troubleshoot hardware, operating system, applications & network problems and performance issues.
• Responsible for Patching (both Operating System and Application Server)
• Installed and configured DHCP, DNS (BIND, MS), web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on AIX and Linux servers
• Installed and Configured Samba (CIFS) to help printing and file sharing in the mixed Environment
• Installed and configured Oracle10g on Linux for the development team.
• Installed Weblogic 9i/10.3 and configured Domains, Admin and managed servers for Applications to be deployed.
• Setup and maintained NFS, NIS, and TCP/IP network, configured the systems for TCP/IP Networking with the existing LAN, setting up SSH and SCP features
• Implemented virtualization using VMware in Linux.
• Performed Kernel Tuning (for Oracle installation), memory upgrades and RedHat Linux Kickstart installations
• Provided support for multi-path Fiber Channel storage systems, configured multiple Fiber Channel (FC) Host Bus Adapters (HBA) on a Storage Area Network (SAN).
• Implemented day-to-day tasks in RedHat Linux that include upgrading rpms, kernel, HBA driver, configuring SAN Disks, multipathing and LVM file system.
• Configured Firewall and security using SSL, IPtables, TCP Wrappers, SELinux Tripwire, and port scanners.
• Performed System Backup using tar, cpio for local systems and Veritas NetBackup for enterprise wide backup and recovery
• Troubleshooting Network issues using ‘ndd’, 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc
• Automated routine activities and scheduled events using shell-scripts (korn and bash) and cron job.
• Installation & Configuration of software packages in Red Hat Linux. (Using both yum and rpm installations)
• Performed application installation and management on Linux servers for applications like Apache and Tomcat
• Installation, update, maintenance and deployment of application, servers, service and software using Puppet automation tool.
• Performed automated user management, installation and configuration of various services and backup-using Puppet.
• Linux SME (subject matter Expert) responsible for maintaining the DNS servers. Installation, maintenance and administration of Oracle and Db2 Server on Sun Servers.
• Migrating the Customer VMs from vSphere 4 to vSphere 5.0 Responsible for creating backup and recovering software using EMC Networker in the office environment.
• Providing 24x7 supports. Updating the FTP repository with newly tested patches, for applying monthly patches on all the Linux Utility servers.
• Monitor and system administration including Install/Update patch software, firmware and security patches for all application in installed infrastructure using Application Security Manager (ASM)
• Responsible for monitoring servers, applications and switches using Nagios.
• Experience using BMC bladelogic client automation Tool Daily production maintenance using basic tools (top, nslookup, netcat, ps, netstat, ping etc)

Environment: RedHat Linux 4.0,5.0 AS ES, AIX 5.1,5.2,5.3, Veritas Netbackup, SAN Storage, 4.5.5, IBM-z/VM, Oracle 9i/10g, Samba, Windows 2000/2003/2008 Server, Web Logic 9i/10.3, VMware ESX 2.x,, Tomcat, Apache Server 2.x, Puppet, Chef, Ruby

Confidential, Boston, MA

Linux/Aix System Administrator

Responsibilities:

• Installed and configured Red hat Enterprise Server 5.x, 6.x on Dell PowerEdge Blade servers and HP C6000, C7000 blade centers using Kickstart with PXE for LAMP (Linux, Apache, MySQL and Perl/PHP) installations.
• Installation, Maintenance, Administration and troubleshooting of OEL, Linux, Sun Solaris, AIX, HP-UX, Red hat, Cent OS and Windows systems.
• Used Logical Volume Manager for the management of Volumes including creation of physical and logical volumes on Linux.
• Developed, customized and build RPMs on Linux for deployment on various servers through Software Development Life Cycle.
• Installed and Configured SSH for secured access on Red Hat Linux Systems.
• Installing, configuring various software applications and packages like Apache, Tomcat Weblogic, Oracle.
• Installed and Configured system network monitoring tool (Nagios) and troubleshoot virtual machine issues
• Installed and Configured e-Directory with LDAP integrations
• Responsible for Patching (both Operating System and Application Server) and supported configuration of DNS
• Involved in migration of Web Sphere Application Server from 5.1 to 6.0.
• Involved in enabling WebSphere global security using Local OS and LDAP/LTPA mechanism, SSL configuration and Ordering digital certs for Pre-prod and Prod environments.
• Installed PostgreSQL database and written shell script for startup in SuSE Enterprise Linux
• Configured Linux as a router/firewall with IP Forwarding and ipchains / iptables
• Installed, configured and maintained EMC Backup Advisor for backup
• Setup kick start server and wrote scripts to install RHEL, CentOS and SuSE
• Setting up FTP and NFS servers for file sharing.
• Setting up and configured Samba for file and printer sharing in heterogeneous environment.
• Configuring, administering and troubleshooting of NFS, AutofS (Direct and Indirect Maps), NIS (master, slave and client) and DNS in multi-platform networks Monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Tuning the Kernel parameters for the better performance of applications like Oracle, Web Logic.
• Maintained system security, including password checks, permission scans, implementation of security using ASM to ensure Linux environment.
• Implementation of Zabbix to monitor network, servers and network hardware.
• Performed application installation and configuration JBoss AS 7,LDAP and Oracle 10g on Linux Server.
• Responsible for managing the Puppet Automation tool including installation, deployment, trouble shooting and updating.
• Worked on the configuration of server monitoring tool like Tivoli
• Experienced on Socket level TCP-IP programming Installation of SAMBA 3.3.x server for interface between Linux servers and Windows servers to share files.
• Implementation of LTM for load-balancing and deploying application.
• Responsible for network troubleshooting and planning in a web hosting environment including the configuration of 3-Tier Environment Creating, Deleting and managing user database and their respective directories.
• Setting up cron jobs for the user to deploy scripts on production servers.
• Troubleshooting day-to-day server related issues and problems in terms of hardware, operating system, applications and network.
• Worked on User administration setup, maintaining account, Monitor system performance.

Environment: HP-UX 11i v1 & v3,Redhat 5, NFS, LVM,Veritas Volume Manager 5.1, DHCP, DNS, SMTP, Puppet, Apache, Dell 6450,1350, F5 load balancing tool and firewall.

Confidential, Irving- TX

Linux/UNIX Administrator

Responsibilities:

• Supported Linux System Administrator customers with RHEL/SUSE a combination of systems architecture, systems development.
• SAN support from a directory standpoint, technology scaling, server builds, migration and/or transition planning, project planning, and standards validation/development, troubleshooting and problem resolution.
• Installed OAS (Oracle Application Server) on Solaris 9 and its configuration with oracle database. Installed and configured of hardware and OS (Solaris 10 and RHEL 4/5) on x86 servers.
• To provide ongoing support in systems management and administration of LINUX/UNIX in global-scale environment.
• Installed and Configured both Kickstart and Jumpstart Servers for the Infrastructure Server Deployments.
• Providing 24*7 on-call support on rotation basis and Handling High priority incidents through bridge calls.
• Patch and Package administration to keep the servers updated with the patches and that implementing packages developed for deployment and load-balance using Local Traffic Manager (LTM) .
• Handled effectively Issues related to NFS, NIS, and LVM, Grub corruption, configuration & maintenance of RAID (level 0, 1, and 5).
• Troubleshooting VERITAS Volume Management and cluster server environment.
• Used VERITAS Netback up tool for Backup and recovery, Developed and executed test plans for Veritas Cluster with Netapp SAN.
• VMware configuration, automount, installing Solaris/Linux software and patches, NTP and swap space, memory and capacity alerts, SSH and k5login and hung system reboots.
• Writing scripts in PERL and SHELL to automate the process.
• Created Korn shell scripts to monitor system resources and system maintenance and Performed administrative tasks such as System start-up/shutdown, and Backup strategy and scheduled cron jobs for job automation.
• Attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.
• Monitored health of servers and implemented customized solutions where applicable as well as provide reports on server utilization.
• Standardization, Documentation and Processes.
• Experience in using protocols like NIS, NFS, SSH, SFTP & DNS. Created test scenarios for testing NIS, NFS, DNS and other functionality of the OS.
• Daily backup and restore operations. Installed and maintained web servers Apache Tomcat and Apache HTTP (1.3, 2.2) Web server in Red Hat Linux.
• Dealt with Linux Utilities: KICKSTART, SSH, FTP, AUTOFS, Quota Management, wrappers.
• Maintaining device installation and configuration.
• Installation of Firewall checkpoint. Installed and configured IPFilter, to protect Linux system that was placed on the Internet.

Environment: Red hat Linux 3,4,5,6 Sun Solaris 8,9,10 Sun V440, V890, T5220, T5240 Sparc M4000, Switches, VMware ESX 5.1, oracle 11g, Veritas Cluster Server 5, F5 load balancing tool.

Confidential, Sunnyvale, CA

Linux/Unix System Administrator

Responsibilities:

• Administration and maintenance of Redhat Linux and SUSE Linux Servers.
• Linux system administration including security, regular auditing for intrusion detection.
• Monitor Disk space and space as needed in LVM.
• Installation of VMware ESX 3.0x 4.0x infrastructure on HP Proliant Server and administration of VMs Trouble shoots and corrects hardware and OS related problems.
• Worked on the configuration of server monitoring tool like Nagios.
• Performed application installation and management on Linux servers for applications like Apache and Tomcat.
• Maintain Web Servers, file servers, firewalls using Application Security Manager (ASM)
• Installation & Up-gradation of Linux Configuring Hardware in all range of Machines from workstations to Enterprise servers.
• Implementing and Administering Network File Systems using Auto-mounter and administering user and OS data files in LDAP, NIS, Windows Active Directory and NFS environment.
• Tuning Kernel parameters for the better performance of applications like Oracle and disaster recovery solution. Deployment and load-balance of applications and software using Local Traffic Manager.
• Experience in Shell scripting to automate system administration jobs.
• Responsible for day - to - day system administration tasks.
• Setting up corn jobs for the user to deploy scripts on production servers Provided 24x7 on-call/Remote Support for UNIX Production Problems Responsible for adding user accounts /creating there home directories.
• Responsible for all day to day system administrator tasks (Disk Space /File System /User logins) Change Management and Implementation of Changes to the Environment Management of user accounts and groups, File systems and disks.

Environment: Redhat 4.0, 5.0, CentOS, E15K, E12K, E10K, E6800, E-6500, E5500, E-4500, E-3500, F5 Security and load-balancing, Veritas file system, Web logic 8.1.

Confidential

Linux/Unix Administrator

Responsibilities:

• Performed automated installations of Operating System using Kickstart for Linux.
• Installation and Up-gradation of RHEL 3.0 Primary support to all kind of issues for all Linux platforms Developed, customized and build RPMs on Linux for deployment on various servers through Software Development Life Cycle.
• Management of user accounts and groups, File systems and disks
• Installation of SAMBA server for interface between Linux servers and Windows servers to share files Patch and Package administration to keep the servers updated with the patches and that implementing packages developed for deployment Install and configure SSH to enable secure access to the servers
• Limiting user account privileges using SUDOERS.
• Creation and Maintenance of User Accounts file systems and successfully created logins IDs on large number of servers.
• Designed bash to automate application and system management activities.
• These scripts provided the following functionality: application startup and shutdown, monitored systems and applications health, and web site management Provided 24x7 on-call/ Remote Support for UNIX Production Problems
• Support to manage documentation for systems and created new procedure to support new products.

Environment: AIX 5.2, RHEL 3/4, p series 550, 570, RS/, E4500, Autosys, VERITAS Volume Manager, VERITAS Netbackup, SUN Enterprise 420R, 450, V490, 3500, 4500, 6500, 8800.