Professional Summary

• Over 6 years of experience as Linux/UNIX system administrator on Red Hat EL 4.x, 5.x, 6.x, Centos 4.x, 5x , Solaris 8,9, 10, AIX 5.x, 6.x, 7.x and Vmware ESX environment.
• Experience in installing, managing Esxi 4.x and 5.x. VMware barebone-guest OS
• Experience in supporting ORACLE/Sybase/MYSQL Database.
• Installed and Configured security and application tool likeTCP wrappers, SSH, BIND, LVM Logical Volume Manager , array and raid-manager, disk-suite, admin-suite.
• Experience working on boot loaders like GRUB and LILO and also upgrading Kernel on Redhat Linux servers.
• Familiarity with Installation, Configuration and Administration of HP Data Protector Veritas NetBackup.
• Experience in Redhat LVM, Solaris SVM, VERITAS Volume Manager, Veritas Cluster Server, VxFs, SVM,ZFS,Ext3,Ext4,UFS,ReFS.
• Experience in Configuring and Monitoring using NAGIOS, NAGVIS, NDOUTLS, ZENOSS, CA, SiteScope, Tivoli Tools and MRTG.
• Experience in configuring Kickstart Jumpstart servers with PXE booting and experience working with Images and Flash Archives.
• Good Knowledge in automation by using Puppet and Chef Master server running on RHEL with around 600 clients.
• Experience in working with LDAP/DNS/NIS/NIS services.
• Experience in managing and troubleshooting intranet, FTP and Mail Server and Managing Back-ups
• Experience in Installation, support and maintenance of Unix/Red Hat Linux ES/AS 5.1 servers.
• Experience in Troubleshooting of all aspects of the Unix/Red Hat Linux operating environments.
• Experience in Performance tuning, networking, system security, IO monitoring and analysis.
• Understanding of disaster recovery implementations.
• Experience in administrative jobs like User management, Security management, backup/restore and Package and Patch management.
• Knowledge in Oracle, MySql, Apache/Tomcat or web logic/JBoss.
• Experience in administration and maintenance of application service like DNS, Mail, HTTP, Apache, Tomcat, Squid, DHCP, SMPT, FTP, POP3, NIS, NFS and Samba.
• Experience in discovering, thereafter creating file systems on LUN from SAN environments.
• Developed UNIX shell scripts using Korn, Shell, Bash and Perl Scripting. Setting up CRON jobs for backups and monitoring process.
• Configure Clusters, Load-balancing, High availability and fail-over solutions Web Server.
• Hands-on experience in diagnosing, troubleshooting various networking, hardware Linux/ UNIX server's services issues and performing preventive maintenance.
• Experience in round the clock service 24/7 , and on call support.
• Ability to lead technical discussions and projects in an organized manner
• Ability to document strategies and designs and present to these ideas to management with cost/benefit analysis
• Able to manage time effectively and to deliver on commitments
• Strong interpersonal skills, including both written and verbal communication skill.

TECHNICAL SKILLS

PROFESSIONAL EXPERIENCE:

Confidential

System Administrator

Responsibilities:

• Performed installation, configuration and tuning of Linux, Solaris servers and AIX.
• Installed PXE servers, Kickstart configurations for automatic Linux Installation.
• Installed OS patches and third-party application patches.
• Good working experience with Redhat Satellite Server for upgrading and installing Packages and patches in Redhat and managing channels.
• Configuration of NIC Bonding on Linux and IPMP on Solaris.
• Build high availability servers using Redhat Cluster involving 2-5 nodes.
• Used bash, awk, and sed to automate most of the daily activities like log monitoring, log rotation and purging, proactive system monitoring with disk error detection.
• Managed various servers using VMware vSphere ESXi 4.1 /5.0/5.1.
• Performed VxVM VCS upgrade from 4.x to 5.x.
• Monitoring disk space, adjust VXVM configuration and add space as needed.
• Installed and implemented VMware ESXi 4.0 host servers with vSphere client, vSphere CLI. Configured HBA and iSCSI SAN storage.
• Managed virtual machines clones and templates, plan and implement VMware Fault Tolerance.
• Familiar with backup and restore of VMWare host server configuration, virtual machine backup, snapshot, P2V-V2V conversion with VMware converter with other third party converters.
• Tuned Kernel parameters based on application and database requirements.
• Shell scripting for automating jobs.
• Configured and maintain volume groups, logical volumes and extended logical volumes using Logical Volume Manager.
• Worked with storage teams to configure EMC SAN, NAS and iSCSI configuration.
• Coordinating with vendor to determine RCA on few occasions by facilitating veritas and solaris explorers, core dumps, RHEL sosreports.
• Monitor, Modify and optimize NetBackup activity, backup schedules and reporting to proactively avoid issues.
• Configured and deployed of Nagios Monitoring system for managing all the Linux warehouse systems.
• Installed BIND package, updated the BIND database and troubleshoot the problems in Red Hat Linux DNS servers.
• Worked on the configuration of mail server using SendMail.
• Involved in corporate level auditing compliances like system security, network security and installation of recommended patches.
• Participated in migration planning, developing, testing and moving the migration process onto full-fledged production network.
• Performed User Account management, data backups, and user's logon support.
• Implemented Network File System NFS for file sharing and network installation.

Environment: RHEL 5.X, 6.X, NFS, Solaris 9, AIX 5.X, 6.X, SendMail, VMware ESXi 4.X, 5.X, Nagios, EMC, LVM, DellPowerEdge 6300/500, Sun E250.

Confidential

System Administrator

Cigna is the leading retail and business healthcare insurance provider in the Confidential This Project is all about installing and managing servers, implemented software and hardware to support UNIX environments, also creating users and user groups, giving authentication to them for maintaining the security. The key roles are to configure and manage Linux server, kickstart server for Red Hat Linux, operating system image installations through Network and deploy packages, script files from satellite server and build rpm package.

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 4.0
• 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, 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's
• 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 Middleware 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

System Administrator

Confidential is an American multinational communications company that provides communications and data services to residential, business, governmental and wholesale customers. As a system administrator, I was involved in monitoring, maintenance and administration of its operational systems, technical support and troubleshooting computer systems.

Responsibilities:

• System Installation and configuration RHEL, Solaris, Windows Servers
• Account, user and group administration, Permissions policy management and quota implementation.
• System performance monitoring, tuning and log management
• TCP/IP Networking troubleshooting and Linux Network Administration
• Installation, configuration, support and security implementation on following services:
• DHCP: Range of IP, Assigning fixed IP to MAC address SSH: Configuring Servers, password-less authentication configuration
• NFS: Configuration, administration, on demand mounting SAMBA: Sharing folders, printers with Win32 Win64 system, Creating SAMBA users NIS: Server and client configuration
• DNS: Server configuration and maintenance HTTPD: Apache web server maintenance, installation, configuration, managing web hosting including name-based, secure and private site, monitoring web server performance, certificate generate, security checks and periodic upgrades, manage user accounts, back up SQUID: Proxy Server configuration, allow deny access E-mail: Postfix, Dovecot configuration, user management, relay, alias, Procmail configuration
• 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 using telnet and SSH connections
• Experience in setup Storage area Network SAN and NAS and file system backup 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

System Administrator

Confidential, a leader in advanced drilling solutions, provides drilling services, rental tools and project management including rig design, construction and operations management to the energy industry. Planned, designed, documented, and implemented various system and network connectivity projects, such as, establish 50 Business partner connections, VPN connections, design network security, site IP renumbering, new site implementation, site migration, site closure, and global application implementation and migration.

Responsibilities:

• Installation and configuration of Linux RHEL and UNIX Sun Solaris servers in production and test environments
• Operating system installation and 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, 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 data migration from 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, Korn shell scripting
• Developed and implemented a network monitoring solution to monitor disparate networks

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

Confidential

System Administrator

Building on a tradition of excellence in Investment and banking Bank of America offer clients a complete range of financial services including banking, lending, insurance, trust, and wealth management solutions. As a system administrator, I was involved in monitoring, maintenance and administration of its IT system and networks.

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

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