SUMMARY

• Overall 8 years of experience as Linux/Unix system administrator on Redhat Enterprise Linux 4.x, 5.x, 6.x,7.x, Debian, CentOS 4.x,5.x,Suse,Oracle Enterprise Linux, FreeBSD, Solaris 8,9,10 and VMware vSphere ESX/ESXi 4.x/5.0/5.5 environment. Motivated, enthusiastic, and pro - active System Administrator with an excellent 'can-do' attitude.
• Experience of 8+ years working on Red Hat Enterprise Linux 5.x/6.x/7.x, Oracle linux, Ubuntu Linux, Fedora, CentOs 6.x.
• Experience with VMware vSphere ESXi 5.0/5.5
• Experience and Familiar with Virtualization technologies like installing, configuring, administering VMware ESX/ESXi and Citrix Xen Server/openstack.
• Created and managed VMs (virtual server) and also involved in the maintenance of the virtual server.
• Understanding of networking concepts, (IE. 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.)
• Understanding of networking fundamentals and network security. Installation, Configuration and managing Firewalls like Fortinet, ZyWall, SonicWall, ISA with content filtering, Anti-Spam, Web filtering, NAT, Application Publishing to public IP, Port Forwarding, log analyzing with Syslog Server.
• Experience in using a tools like Nmap, hping, Nessus for penetration testing.
• Experience in implementation Intrusion Detection System: Tripwire, Snort, Lids.
• Experienced in installation, configuration, design and ongoing maintenance of Cisco router and switches.
• In-depth knowledge of Apache Subversion (SVN) and Jenkins/Hudson Continuous Integration Server - Installation, Configuration, Design and Administration.
• Deployed Puppet for automated management of machine configurations.
• Experience with x86 / x64 Intel, HP, IBM & Dell hardware like rack-mounted servers, tower servers, desktop, laptop and other peripherals.
• Experience in iSCSI SAN, NAS, NFS storage and RAID concept.
• Experiences in NIS, LDAP, NTP, FTP, DHCP, SAMBA, users setup/troubleshooting.
• Experience managing various filesystem using VxVM, LVM and SVM and also configured filesystem through network using NFS, NAS methodologies and installed RAID devices.
• Experience in Server monitoring, capacity planning, application monitoring with the help of Tivoli, HP insight, Nagios, Cacti, Zabbix
• Handling day-to-day 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, Perl and python 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, Solaris servers by performing patching operations on a regular and planned way.
• Installation and configuration of Web Application servers like Apache, Tomcat and Weblogic.
• Have tested various Linux Environments in the Development/Test Stages to help create a better standardized environment and resolutions of any problems if any occurred.
• Experienced in documenting 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.
• Experience in Microsoft Office Suite, Open Office, Visio, Outlook, Printing, Windows networking, Security patching

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6/7,OEL5/6, Centos 4/5/6, Fedora, Windows 2003/08/12Hardware HP Proliant, Blade servers, Sun Servers E450, E3500, E4500, E5000, E6500, E10k, E15k, E25k, Sun Ultra's, V210, V280, V490, V880, V6800 SUN Ray (1g Ultra Thin Client) DMX4 Storage Arrays, F5

Services: NFS, SSH, SFTP, FTP, rlogin, RPM, YUM, Samba, Auto FS, Telnet.

Monitoring Tools: Tivoli, Nagios, Cacti, Zabbix

Testing Tools: Nmap, Nessus, Saint, Nexpose, hping

Languages: C, C++, HTML, Java Script, SQL, Bash, Python Scripting

Virtualization: Red Hat Enterprise Virtualization (RHEVM), AWS,VMware and VSphere 4.0/5.0/5.1

Networking: TCP/IP, UDP, LAN, WAN, NIS, NIS+, DNS, DHCP, NAS

Filesystems: LVM, VxVM, SVM

Data Base Servers: Oracle 8.x, 9.x, MS-SQL

Applications: Apache, Tomcat, Web logic

PROFESSIONAL EXPERIENCE

Linux Administrator

Confidential - Atlanta, Georgia

Responsibilities:

• Installation and configuration of Red Hat Linux Enterprise, Oracle linux, windows server 2008/R2/2012 on new server builds as well as during the upgrade situations.
• Experience with VMware vSphere ESXi 5.5
• Deploying oracle linux, redhat linux, and windows servers in fast paced environment.
• Creating the template for the linux those are used for deploying for the environments.
• System audit report like no. of logins, success & failures.
• Remotely coping files using sftp, ftp, scp, winscp, and filezilla.
• Created user roles and groups for securing the resources using local operating System authentication.
• Modified Kernel parameters to improve the server performance in Redhat Linux & oracle.
• Experienced in tasks like managing User Accounts and Groups, managing Disks and Filesystems.
• Installation of OSSEC for the intrusion detection in the server and its configuration to check specific services are running only
• Installation of centrify (express edition) and integration with Active Directory Server for Linux Systems and updated the user login in centrify configuration.
• Install and configure packages for the server they are needed by vendors.
• Participated in the migration planning, developing, testing and moving the migration process onto full-fledged production network
• Manage logical Volume manager on Red hat Servers
• Configuring & monitoring DHCP server.
• Experience in installing, integrating, tuning and troubleshooting Apache and Tomcat application server.
• Worked on EMC storage for the virtual machine.
• Supporting Customers on a real time IssueTrak ticketing System for solving online operational issues.
• Taking backup using tar and recovering during the data loss.
• Documenting the installation of third-party software’s.
• Maintaining relations with project managers, DBA’s, Developers, Application support teams and operational support teams to facilitate effective project deployment.
• Manage system installation, troubleshooting, maintenance, performance tuning, managing storage resources, network configuration to fit application and database requirements.
• Performed regular installation of patches using RPM and YUM.
• Maintained LVM, VxVM and SVM filesystems along with NFS.
• Migrated centrify configuration to samba winbind to authorize and authenticate users of the domain to have access to the servers.
• Patching of windows server in the weekly basis on the entire environment as needed.
• Performed application installation and management on Linux servers for applications like JBoss 4.2.x, 5.x, Oracle
• Installation of SAMBA 3.6.x server for interface between Linux servers and Windows servers to share files.
• Troubleshooting of day to day system and user problems various Servers on windows and linux both.

Linux Administrator

Confidential - Racine, WI

Responsibilities:

• Experience in vSphere ESX/ESXi 4.1, 5.0, 5.1deployment and management.
• Advance Scripting skills in Perl and Bash Shell.
• Day to day system administration to support 100+ Server in Production in development environments.
• Primary support to all kind of issues for All of Unix and Linux
• Worked with Redhat for finding root cause on panic issues
• Installation and configuration of SUDO package accomplished successfully across various UNIX platforms.
• Limiting user account privileges using SUDOERS.
• Installation and configuration of Web /Application Server Tomcat and Apache
• Implementing appropriate permissions for files and folders and Managing Users and Groups
• Troubleshooting of day to day system and user problems various Servers on different platforms.
• Familiarity with configuring and using a Configuration Management product for Linux servers (e.g. Cobbler)
• Used VMware vCenter, created DataCenter Environment by creating VMware clusters, adding ESXI hosts in the Clusters, and implemented HA and DRS.
• Servers support included NFS, NIS, LDAP, NTP, FTP, users setup/troubleshooting.
• Installed OS patch clusters and 3rd party application patches
• Monitoring Disk space, adjust VXVM Configuration& add space as and when needed
• Working knowledge of Remedy ticketing system.
• Worked on the configuration of server monitoring tool like Nagios, Zabbix.
• Monitoring and install or updates patch software’s, firmware, and security patches for all applications in installed infrastructure.
• Creation and Maintenance of User Accounts file systems and successfully created logins IDs on large number of servers
• Administrated DHCP, DNS and Samba services in Linux.
• Configuration, Administration and maintenance of NFS, DNS, NIS on Linux Servers.
• Working on evaluating new hardware and software’s.
• Provide 24x7 on-call /Remote Support for UNIX Production Problems.
• Responsible for Installation of various Hardware Components on various servers.
• Installation, Maintenance and Administration of Red Hat Enterprise and CentOS.
• Responsible in building and startup shell scripts, managing the automation of CRON jobs
• Responsible production support of LDAP, Domain users, Users and groups and given appropriate permissions, shares and privilege to access LAN and Domain environment.
• Implemented Redhat Conga Clustering for Apache Web Servers, Puppet, Git, SVN.
• Installed and Implemented VMware ESXi 4.0 host servers with vSphere Client, vSphere CLI. Configured HBAs and iSCSI SAN storage.
• Configure vNetwork Standard Switches, vSS Policies, and Shared storage for vSphere.
• Create and Deploy Virtual machines & vApps
• Create and configure VMFS Datastores.
• Manage Virtual Machine Clones and Templates, plan and implement VMware Fault Tolerance
• Installed and implemented open source OpenFiler 2.3, ISCSI SAN with RAID 10 for VMware and other servers with iSCSI initiators. Also managing iStor SAN and Symantec Backup Exec 12.
• Installed and implemented Manage Engine monitoring application and configured SNMP and WMI on Servers and other network devices for reporting and alerts notifications.
• Installed and Tested VMware Site Recovery Manager (SRM 2.0/4.0) for the disaster recovery and managed recovery plans
• Participated in the migration planning, developing, testing and moving the migration process onto full-fledged production network

Linux Administrator

Confidential - San Francisco,CA

Responsibilities:

• Administration and maintenance of Red hat Linux
• Worked on Oracle and MySqL Databases and performed performance tuning and troubleshooting.
• Worked on User administration setup, maintaining account, Monitor system performance.
• Activities include 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.
• Experience in system Software installation and configuration of NFS shares, Auto-Mounter, DHCP and LDAP
• Created and modified Veritas Cluster Service Groups and managed switchover from node to node and just as importantly, from interstate primary and DR sites
• 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
• Experience in migrating old server to HP Blade system server.
• Configure RAID mirroring on Linux platform
• Maintained and monitoring System Activities like CPU, Memory, Disk and Swap space usage to avoid any performance issues
• Configuration and Administration of Load balancers and F5's, taking servers in / out of rotation.
• Installation of VMware ESX3.5.x4.0x infrastructure on Dell Power Edge Server and administration of VMs
• Experience in installing, integrating, tuning and troubleshooting Apache and Tomcat application server.
• Performed application installation and management on Linux servers for applications like JBoss 4.2.x, 5.x, Oracle
• Configuring, administering and trouble shooting of NFS, AutoFS (Direct and Indirect Maps), NIS (master, slave and client) and DNS in multi-platform networks.
• Worked on the configuration of mail server using Send mail 8.10.x, 8.11.x.
• Installation of SAMBA 3.3.x server for interface between Linux servers and Windows servers to share files.
• Install and configure SSH to enable secure access to the servers.
• Modified the Linux kernel to add tracing probes for Configuration access tool.
• Environment, Command line, Current working directory, root directory, executed command.
• Experience in Shell scripting bash to automate system administration jobs

Linux Administrator

Confidential - Minneapolis, MN

Responsibilities:

• Automated installation of Linux servers using Kickstart and Installation of Solaris using Flash, live upgrades and Jumpstart Servers.
• Knowledge in ALOM & ILOM.
• Creating and managing file systems, Creating and managing Logical volumes in Linux and VERITAS Volume manager in Solaris & Linux.
• Installation of patches and packages using RPM and YUM in Red hat Linux and Suse Linux and also using patchadd and pkgadd in Solaris 10 Operating System.
• Usage of Service Management Facility for enabling, disabling and also troubleshooting services in maintenance mode.
• Worked on IBM system Z series, zLinux, zVM, zOS, LPAR.
• Knowledge in IBM Websphere server, IBM HTPPs.
• Experience with configuring and Installing Zones for running applications in different zones in Solaris 10.
• SAN and iSCSI disk Configuration in Linux.
• Modified Kernel parameters to improve the server performance in both Solaris and Linux.
• Providing Statistics on Hard Disk Usage.
• Configuration of Clusters using VERITAS Cluster Services in Solaris and Linux.
• Backups of systems and restoration using Net Backup on both Solaris and Linux.
• Creating Disk Volumes, Installed and Configured RAID controllers RAID 0, RAID 1 and RAID 5.
• Installation of HBA drivers and Upgrading of HBA cards before the move.
• Installed, configured and maintained Apache/Tomcat Web Server.
• Installed and configured NFS, NIS and FTP Servers.
• Bash Shell Scripting for job automation.
• Understanding and experience on TCP/IP networking in Solaris and Linux Systems.
• Experience with VMware ESX Server 3.5.
• Performance tuning and monitoring of Servers in Solaris, Linux.
• Supporting Customers on a real time remedy ticketing System for solving online operational issues.
• Experience with the Change Management tool for reporting and resolving issues.