SUMMARY:

• Innovative IT professional with 6 plus years of proven experience in planning, developing and maintaining high availability mission critical system administration and networking systems.
• More than Six years of advanced UNIX system administration specializing in system administration, networking and security.
• Experience with RHEL 3/4/5.
• Experience in ESXi 5.X, baremetal install, deploying Guest OS (RHEL), VMware vCenter, Vmotion, Vsphere.
• Exposure and understanding of Oracle Sun Solaris 9/10.
• Configured Servers like DNS, DHCP, Samba, NFS, NIS, Send mail, http, daemon, Ftp, Telnet, SSH, Firewalls and package management using RPM patch management.
• Configured RAID, LVM (Extending, Shrink), and Grub modification, Kernel Update.
• Experience in kickstart, jumpstart, VERITAS cluster manager and Linux clustering.
• Experience with HPSA server automation tool to deploy servers.
• Experience in Dell DRAC, HP ILO, Sun ALOM.
• Experience in Java/Tomcat/Apache based Application support.
• Experienced in Logical Volume Management on Linux with LVM.
• Hand on experience in HTTP, HTTPS, SMTP, FTP, SFTP, DHCP, DNS, SNMP TCP/IP, UDP, ICMP, VPN, POP3 protocols.
• Proven ability to automate server builds using kickstart, management and configuration of system services, GRUB.
• Comprehensive knowledge of Linux kernel tuning, patching and extensive knowledge of Linux system imaging/mirroring using System Imager.
• Proficient in configuring NFS, Crash Recovery, Change Management, back up and restoration of data and system monitoring using various tools.
• Well versed in virtualization (VMware) technologies and data center migration.
• Experienced with Unix Administration EMC SAN Administration, NetApp & NAS administration.
• Possess good analytical and problem solving capabilities with excellent communication and technical documentation skills.

TECHNICAL SKILLS:

UNIX: Linux (Red Hat, Debian, Fedora), Solaris.

Operating System: RHEL 3/4/5, Solaris 9, 10, Windows (98/2000/XP/Vista/Windows7).

Networking: LAN/WAN administration, VPN, NAT, SSH, BIND, NIS, Cisco IOS.

Firewall: IP - Chains, Iptables, NAT, and DMZ.

Proxy: Squid 2.x, MS Proxy 2.x

Security: Netfilter/iptable, SSH, SSL, TCP Wrapers.

Protocols: TCP/IP, SNMP, NFS, SMB, LDAP, DHCP, SSH, FTP.

Scripting/Languages: Korn Shell, Bash, and Perl.

Storage and backup: Tivoli Storage Manager, Veritas Net Backup, EMC, SAN, and NAS.

Virtualization: VMware, vSphere ESX 4.0

Web/App Servers: Apache, Tomcat.

Hardware: Dell PowerEdge, HP ProLiant, IBM x Series, Blade Servers.

Monitoring: hobbit, nmap, Nagios, Cacti.

PROFESSIONAL EXPERIENCE:

Confidential, Wilmington, Massachusetts

System Administrator

Responsibilities:

• Involved in installation and configuration operating system Red hat Enterprise Linux (RHEL5.3 and RHEL 5.4) in development and test environments almost six levels on HP physical servers and Virtual Machines
• Worked with VMware ESXi 5.0.
• Designed, managed, implemented/ supported: Backup/Recovery/Archive, Security Startup/Shutdown, Mass Storage (SAN/NAS), OS Installations/Patches, Hardware/Software installation, Batch scheduling, Data center Migration, Application and Server performance.
• Worked in adding new Users and groups and give sudo access in test and development servers and central file synchronization via sudoers, authorized keys, passwd, shadow and group.
• Worked with DBA team in installing and configuring Oracle 10 g and 11g, Sybase, Db2 client v 8.1 and v9.0.
• Coordinated with application team in installation, configuration and troubleshoot issues with Apache, Web logic on Linux servers.
• Used VERITAS Volume manager to create disk groups, volumes, volume groups, and RAID.
• Involved in back up, firewall rules, LVM configuration, monitoring servers and on call support.
• Involved in shell scripting for system/application in automating server task, installing and monitoring applications and data feeding file transfer and log files.
• Involved in installing and configuring operating system Red hat Enterprise Linux in Production, QA and test environments on standalone IBM servers and IBM Blade Center Hardware.
• Configured Kickstart for RHEL 5 to perform image installation through network.
• Worked with Red hat Linux tools like RPM to install packages and patches for Red hat Linux Server and managed virtualized OS.
• Worked on network connectivity, SAN storage, creating LVM and taking TSM backup.
• Creating and managing user accounts and groups and their permissions and creating files and directories permission.
• Co-ordinate with Middle ware team in installation, configuration and troubleshoot issues with WebSphere Application Server and Apache/Tomcat server on Linux.
• Installed/Configured/Maintained/Administrated the network servers DNS, NFS and application servers Apache and Samba server.
• Extensively worked with the LAN/WAN, firewalls and routing for Internet and Intranet connectivity using different protocols like TCP/IP, DHCP, HTTP/s, FTP, SMTP & SSH.
• Involved in DMZ firewall rules, configure iptables and iptables init script, start and stop init script for Apache and other application server.
• Created BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Modifying user’s password policies, group policy, UID and GID assignment policies.
• Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat and cpuinfo to check the CPU utilization, bottlenecks of I/O devices, memory usage and network traffic.
• To troubleshoot network connectivity used ping, netstat, ifconfig, and trace route commands. To login to the remote system using sudo, putty and telnet. To transfer files across the systems on the network used ftp and scp commands.
• Linux technical support and prepared technical documentation for check in verification.
• Regular backing up of critical data and restoring backed up data Worked in solving tickets issued on day-to-day activities and problems related to development and test servers.

Environment: Red Hat Linux (RHEL 5), Oracle 10G, TCP/IP, DNS, DHCP, NFS, SAMBA, Apache, POSTFIX, POP3, SMTP, MySql, Oracle.

Confidential, Los Angeles, CA

System Administrator

Responsibilities:

• System Installation and configuration (RHEL, Solaris, Windows Servers).
• Account,user and group administration, Permissions policy management and quota implementation.
• Systemperformance monitoring, tuning andlog management
• TCP/IP Networking troubleshooting and Linux Network Administration.
• Installation, configuration, support and security implementation on following services:
• Management of Firewall, iptables.
• Implement and maintain server virtualization using Vmware.
• Installation and configuration of database systems e.g. MySQL, Oracle.
• System monitoring and remote connection management usingtelnetandSSHconnections.
• Experience in setup Storage area Network (SAN) and NAS and file systembackup and restore.
• 24x7 on-call rotation for support of production systems.

Environment: Sun Solaris, Red Hat Linux (RHEL 4), Oracle, TCP/IP, DNS, DHCP, NFS, SAMBA, Apache, POSTFIX, POP3, SMTP, MySQL, Oracle, Vmware.

Confidential, Houston, Texas

System Administrator

Responsibilities:

• Installation and configuration of Linux (RHEL) and UNIX (Sun Solaris) servers in production and test environments.
• Operatingsystem installationand configuration (methods including Kickstart, jumpstart), disc partition set-up, patch administration, package management including kernel upgrade.
• Setup, maintenance, and operation of company-wide services such as DNS (BINDv8), mail (sendmail), www (Apache/SSL), Samba, and DHCP.
• Implemented automated installations with Kickstart/Jumpstart, installed RPMs and packages. Always installed servers with the assumption that they will be unprotected on the network and therefore must be very secure. Wrote policies and procedures for securely deploying Red Hat Linux, Solaris, and non-firewalled environments.
• Configured storage using LVM (Logical Volume Manager) to configure volume group, logical and physical partitions and importing new physical volumes.
• Implemented RAID configuration for redundancy members of a team.
• Configured Telnet, FTP, sFTP, SSH, iptables, Samba for the servers.
• Deploy, configure and maintain Open Fiber based SAN/NAS units.
• Performed reconciliation of checks and datamigrationfrom one tier to another.
• System Design - designed, deployed and maintained multiple Linux-based FTP/MySQL servers for end users.
• Disaster Recovery - Designed, built and maintained disaster recovery data center for company.
• Networking Support -Routing, WAN/LAN, switching and VPN support.
• System Deployment -Implemented new system imaging procedures to improve consistency in end-user computer system deployment.
• Scripting and task automation using Corntab, Bash, and Korn shell scripting.
• Developed and implemented a network monitoring solution to monitor disparate networks.

Environment: s: Red Hat Enterprise Linux, Fedora core, Sun Solaris, Windows 2003 server, TCP/IP, DNS BIND, SAMBA, APACHE, CISCO, SSH, MS Windows XP.

Confidential, Wilson, North Carolina

System Administrator

Responsibilities:

• Software and Hardware upgrades of Solaris/Linux systems.
• Installed and Configured vsftpd, Telnet, Dhcp, Httpd, Ftp, ssh, iptables, squid Samba for the servers.
• Configured kickstart files, installed RPMs & Packages and Installing Patches.
• Installed and administered Debian GNU/Linux systems providing IS infrastructure (mail, web, FTP, streaming media).
• Managed, and performed the upgrade of Symantec/VERITAS Netback up infrastructure from version 4.5x to 6.x in mixed UNIX/LINUX/Solaris environment.
• Designed and implemented an automated system installation and configuration system, based on Solaris Jumpstart and GNU.
• Responsible for corporate level auditing compliances like system security, network security and installation of recommended patches.
• Experience in debugging scripts and written shell scripts to reflect the changes to many UNIX systems.
• Routing related tasks included providing Cisco routers and switches configuration and change management, providing technical support for Cisco Router configurations and installation for customer
• Excellent experience and knowledge with designing, installing and implementing VMware ESX server, VMware virtual center, virtualization tools.
• Involved in hardware installation and maintenance of workstations, servers, and other supporting hardware.
• Involved in managing the company’s hardware and all set-up issues.

Environment: s: Red Hat Enterprise Linux, Fedora core, Solaris, Windows 2003 server, Apache, Squid, BIND, Web logic, Sendmail, MS Windows 98/XP.

Confidential, St. Louis, Missouri

System Administrator

Responsibilities:

• Configuration of LVM (Logical Volume Manager) to manage volume group, logical and physical partitions and importing new physical volumes.
• Configuration of RAID 0,1,01,10,50 for backup and recovery.
• Updating Patches in the Systems as per the requirement.
• Responsible for supporting Sun servers for production, development and testing.
• Installing, Configuring and Maintaining the DHCP, DNS, NFS, NIS, send mail server.
• User Account Management, Group Account Management, configuring dumb terminals, adding modems, formatting and partitioning disks, manipulating swap, local and remote printer management, taking and restoring backup, scheduling jobs.
• Performance tuning and preventive maintenance. Performed daily backup.
• Performed installation and configuration of LDAP.
• Resolving TCP/IP network access problems for the clients. Implementing Remote System Monitoring with Sun Microsystems.
• Develop, Maintain, update various scripts for services (start, stop, restart, recycle, cron jobs) UNIX based shell.
• Experience with OS upgrades and installation of third party software, packages and patches.
• Scheduling full and incremental backups using Net Backup on daily, weekly and monthly basis.
• Experience with adding and configuring devices like Hard disks and Backup devices etc.

Environment: Sun Solaris, Red Hat Linux, DNS, DHCP, NFS, SAMBA, Apache, SMTP.