SUMMARY

• 8+ years of experience on Linux, Solaris and Windows administration and troubleshooting skills in Unix/Linux environment.
• Subject matter expert on Linux, specifically CentOS, Red Hat Enterprise Linux
• Perform daily system admin tasks like managing resources & end users support operations and security
• Hands on experience with installation and configuration of Web/Application server with Apache, Jboss
• Troubleshoot performance issues within the application, web and database
• Create, deploy, and manage virtual hosts using VMware
• Actively monitor system performance and stability, love for facing the unknown on a daily basis
• Knowledge of web servers, security, DNS, file systems, Create and maintain system documentation
• Participate in an on - call rotation for mission critical alerts & Respond to trouble tickets
• Strong networking troubleshooting ability
• Knowledge of networking fundamentals such as TCP/IP, UDP, Routing, DNS and packet analysis
• Managing packet analysis with wireshark & tcpdump.
• Knowledge of network engineering and local and wide area (LAN/WAN) technologies and topologies
• Solid ability to write scripts in administrative language (shell, batch)
• Strong attention to detail with a predilection toward automating necessary tasks
• Job control, soft and hard links, distinctions between the kernel and the shell, shell scripting
• Respond to alerts, perform analysis and troubleshooting, escalate issues as necessary
• Installed packages using YUM and RPM on various servers
• Managing the user environment by adding, modifying and removing user accounts from the environment and limiting access to appropriate nodes
• Responsible for independent support of Tier 2 issues: reboots, start/stop services, reset Terminal Service and pc connections, administrative server maintenance, daily follow up with clients to ensure resolution of all issues
• 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.
• Monitored the file systems and CPU load for better performance.
• Resolution though ticketing system to maintain minimum downtime and resolve calls within SLA
• Automating many day to day tasks through shell, batch scripting
• Install and configure DHCP, DNS (BIND, MS), Web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on Linux/Windows servers
• Linux kernel, memory upgrades and swaps area & Red Hat Linux Kickstart Installation
• Created users, manage user permissions, maintain User & File System quota on Red Hat Linux
• Diagnosed hardware and software problems and provided solution to them
• Attended team meetings, change control meetings to update progress, and for upcoming changes in environment.
• Experience in OS upgradation and XSCF firmware upgradation.
• Test, install & update Packages & Patches on various servers as per requirement (Red Hat/Centos/Win Server)
• Monitored network traffic and adjust system parameters to increase system performance
• Allocation and De-allocation of Logical Units using SVP and Storage Navigator in Hitachi 9990V
• Identifying errors using logs in SVP and collecting dumps for issue analysis.
• Knowledge in Configuring a Switch, knowledge in Zoning.
• Trouble shooting Switch port issue & knowledge on ISL configuration for SAN switches
• Responsible for resolving issues like zoning/storage allocation, HBA failures, and performance issues
• Technical experience on SUN Solaris, on SUN SPARC M9000 server & on SUN Cluster 3.2 environment
• Maintained dual-node HA clusters with fiber-attached RAID on Solaris.
• Experience on SL500 with Enterprise Backup Software7.4
• Experience in OS upgradation and XSCF firmware upgradation
• Hands on experience with installation and configuration of VMware Workstation.
• Knowledge in ticketing tool Remedy.
• Knowledge in Windows Registry, File System, Services, Devices, Security, DNS, TCP/IP, Firewall, Proxy.
• Knowledge in Software deployment with SCCM and windows administration.
• Good understanding of methods using Active Directory and Group Policy.
• Having knowledge in troubleshooting and diagnostics of PC, Server & Network infrastructure.

TECHNICAL SKILLS

OPERATING SYSTEMS: Windows, Linux/Unix (RHEL/Centos/Solaris)

Hardware: SUN High end Series, Sun Fire 490,480

STORAGE: Hitachi, Dell

TAPE LIBRARY: Stream Line 500

SAN SWITCH: Brocade

VIRTUALIZATION: VM Ware, Microsoft Hyper-V

SCRIPTING: Bash Script, Shell Script, Batch Script

MONITERING: Nagios, SMC

TOOLS: Putty, WinSCP, Remedy, Wireshark, Microsoft Office Suite

PROFESSIONAL EXPERIENCE

Confidential - Bloomington, IL

Sr.Linux System Administrator

Responsibilities:

• Install, configure, maintain and administer Linux System using Kickstart and interactive installation on many servers
• Install hardware, software and monitor application performance and availability
• Perform a variety of maintenance and end-user support to ensure that all workstations, servers and overall network performance meet the State's standards and requirements
• Administer and configure Logical Volume Manager (LVM) which involve creating and modifying File Systems, Logical Volume, Physical Volume, Volume Groups and Resizing
• Support user management, create user and group accounts, profiles, configure appropriate access for users and groups, and manage quotas
• Diagnose and resolve performance bottlenecks on various servers and workstations
• Configure and Administer NFS, LDAP, HTTPD, and DNS on Linux server environment
• Hands on experience with installation and configuration of Web/Application server with Apache, Jboss
• Perform daily backup operations, ensuring all required files systems and system data are successfully backup to appropriate media, disk and recovery tapes
• Administration and monitoring infrastructure consisting of SMC & Nagios server as web interface for configuration and display of performance data
• Firewall installation and configuration, NAT, port monitoring, network intrusion testing, and certificate maintenance
• Troubleshoot network related issues on various servers
• Assist in developing strategic technical documentation and written communication relative to IT and State policies and procedures
• Configuration and administration of Fiber Card Adapter's and handling of SAN (Hitachi).
• Trouble shooting Switch Port Issues & knowledge on ISL configuration for SAN switches
• SAN switching zoning and maintenance.
• Monitor Service Desk tickets from queue, provide assistance, customer maintenance and testing
• Hands on experience in Installation, Configuration and maintenance of Linux, Windows & SAP.
• Worked in Linux (RedHat Enterprise Linux). (Administration, Patches, OS upgrade, Performance tuning (CPU load), Web server installation, Troubleshooting)
• Troubleshooting and diagnostics of PC, Server & Network infrastructure
• Responsible for the Server Administration tasks in the Web server support areas, Installed and Configured Web Application and Mail servers, wrote shell, batch scripts for automating tasks.

Environment: RedHat, Oracle Solaris, Windows, SAN, Hitachi, Apache, jboss, TCP/IP, SQL, Oracle, WebLogic, Shell, bash, MS Office Tools, Jboss and SL500, LTO4, SMC, Nagios, Putty, WinScp.

Confidential - Newport Beach, CA

Linux Engineer

Responsibilities:

• Supporting the client 24/7 to resolve issues.
• Installed and configured RHEL 4.x/5.x, Solaris 8/9/10, Windows 2003/2008/2012 for production, staging and test environments.
• Deployed latest patches for Sun, Linux and Application servers.
• Hands on experience with installation and configuration of Web/Application server with Apache, Jboss
• Maintaining around 60,000 users and 30,000 groups.
• Monitoring, troubleshooting & reporting daily backup status for all critical production Solaris and Linux servers enterprise-wide with Hitachi box
• Strong hands on experience on GUI & CLI.
• Scheduling cron jobs for disk utilization, CPU utilization, backup of the data & operating system and other applications as per the requirement using shell scripting.
• Installation and configuration of Windows 2003/2008 including Active Directory Services, DHCP, DNS on several Dell and sun Servers
• Maintained dual-node HA clusters with fiber-attached RAID on Solaris.
• Installed Application Agents on 1500 Virtual/Physical servers in windows 2000/2003/Linux/Solaris.
• Setup of full networking services and protocols on Solaris, including NIS/NFS, TFTP, FTP, DNS, SSH, DHCP, TCP/IP, SNMP, SSL, and creating security certificates for the servers to insure optimal networking, application.
• Setting up the log logic server for collecting logs from all the servers to one system for trouble shooting.
• Setting up the spectracom for the time sync to all the devices and servers in the NSC.
• Administered, maintained Red Hat 5.0 AS, ES, Troubleshooting Hardware, Operating System. Application, Network problems and performance issues.
• Disk Space management using Logical Volume Manager.
• Implemented Virtualization using VMware, HyperV. Installed VMware ESX server on Dell Servers and configured Solaris 9/10/ Red Hat Linux, Windows virtual machines for various applications.
• Troubleshoot the TCP/UDP traffic using tcpdump, snoop and wire shark for analyzing the voice packets on the vlan. Able to decode the packets into binary and also able to read the hex codes.
• Look for the network block on LAN, Talk to Brocade network folks to open the ports or block the ports according the requirement.
• Installation of software packages and checking the integrity of the installed packages.
• Administered Linux servers for several functions including managing Users, Groups, and permission for each groups and users.
• Allocation and De-allocation of Logical Units using SVP and Storage Navigator in Hitachi 9990V
• Installed and configured users to access privileges.
• Worked with different hardware and software vendors to troubleshoot the hardware and software problems.
• Managing cron jobs, batch processing and job scheduling.
• Support and detailed troubleshooting of Sun Solaris in a 24 x 7 Environment.
• Setting up the servers (Red Hat and windows) for different kinds of application like UAS,RNM, VNIC, RSM, Activity Warehouse, NTP time servers, Log logic, KMF and ISSI Gateways.

Environment: RedHat, Solaris, SAN, Hitachi, Apache, Jboss, Active Directory, Group Policy, User & Group administration, Brocade Switch, Fiber, Storage Navigator, Service Processor, VMware, Putty, WinScp.

Confidential - SFO, CA

Linux System Administrator

Responsibilities:

• Install new physical and virtual servers using VMware Virtual Center and configure hardware, settings, directories, storage in accordance with standards and project/operational requirement
• Design firewall rules for new servers, deploy patches associated with Linux Operating System and hardening the system to ensure a consistent secure platform
• Administer and configure DNS, NFS, FTP, APACHE and LDAP on newly installed servers
• Automate and schedule jobs, scripts and administer task using Cron, and enable system network logging for maintenance and testing
• Perform RPM and Yum package installation
• Install and configure Logical Volume Manager, perform hard disk and storage allocation and management
• Create user & group accounts, network configuration, manage passwd, permissions & administer quotas
• Perform daily system monitoring, verifying the integrity and availability of all hardware, server, system resources, viewing system and application logs and verify completion of scheduled jobs
• Ensure proper recording, documentation and closure of tickets
• Managing packet analysis with wireshark & tcpdump.
• Managing firewalls, anti-spam, anti-virus, networking protocols & security.
• Manually starting back up if auto back failed.
• Check the Daily mails for any kind of alerts and Inspect daily logs
• Maintain minimum downtime and resolve calls within SLA.

Environment: Red Hat Enterprise Linux, Centos, YUM, RPM, LVM, wire shark, firewalls, anti-virus, Putty, M.S. Office.

Confidential

Linux System Administrator

Responsibilities:

• Installation, Configuration and Administration of RHEL, Windows Server, and Ubuntu servers.
• Implemented and configured VMware vCenter server, vSphere and ESXi hosts running on Windows.
• Monitoring and troubleshooting servers (RHEL, Windows and Ubuntu) and Network using Nagios.
• Monitoring and troubleshooting of VMware infrastructure VMs & ESXi servers (CPU, Memory, Disk and Network Utilization) .
• Root causes analysis for VMware vSphere & ESXi hosts, Windows, Linux, Ubuntu servers and EMC storage using log files.
• Monitoring & troubleshooting Symantec Net Backup and EMC storage.
• Firmware upgrade (Dell blade server).
• Created clusters for High Availability (HA).
• Used VMware vMotion to migrate running VM between hosts to eliminate application downtime.
• Part of the team to perform disaster recovery (DR) planning and testing.
• Asset tracking and audits quarterly.
• Managed user accounts using Active Directory.
• Created and deployed RHEL, Ubuntu and Mac OS Images.
• L2 Support for Linux Servers.
• Performed hardware replacement and troubleshooting (Solaris and Dell servers)
• Created scripts to automate tasks using Bash and PowerShell.
• Worked with Tech Support of various hardware vendors.

Environment: Red Hat Enterprise Linux, Ubantu, Windows, Nagios, Symantec Net backup, EMC, Dell, Active Directory, PowerShell, Bash, Batch Script, Putty.

Confidential

Linux Administrator

Responsibilities:

• Installation, Configuration, Upgradation and administration of RHEL & CentOS using Jumpstart & Kick-start OS integration.
• Performed package installations, maintenance, periodic updates and patch management on Linux using rpm/yum and system administration tasks such as User/group account management, LVM, file systems, disk management, load balance monitoring on servers and server health checks
• Responsible for configuring and managing DNS, DHCP, SMTP, Samba, NFS, FTP, SSH, LDAP, NIS and Squid servers in Linux.
• Responsible for configuring real time backup of servers. Manage security of servers.
• Respond to work requests which include problem trouble-shooting, root cause analysis, executing scheduled changes, performance analysis.
• Write Bash/batch scripts for task automation
• Managing services, maintaining and managing log files, monitoring event, logs and troubleshooting system problems and resolve for any reported issues
• Track disk space on servers and manage disk space according to requirement.
• Responsible for reviewing open tickets, resolve and close any existing tickets using BMC Remedy tool.
• Responsible for resolving network issues using network tools like ping, tcptraceroute, traceroute and tcpdump. Manage security of servers.
• Virtualization Experience with VMware and Vsphere virtualization.
• Installed VMWare to perform virtualization of RHEL servers
• Assist in monitoring network security while adjusting & updating systems to meet Company's requirement
• Assist in ongoing system performance, system application tuning, hardware upgrades, and resource optimization as required.
• Configure CPU, memory, and disk partitions as required.
• Creating and managing users and groups assign permissions and control access to files
• Provide first level contact, troubleshoot application issues on the platform and convey resolutions to customer issues
• Provide telephone and in-person support to end users for network and application issues

Environment: RHEL, CentOS, Squid, Remedy, VERITAS Net back-up, Putty.