SUMMARY:

• A professional system admin with over 7 years of experience on various flavors of Linux and Unix servers; RHEL, SUSE, AIX, UBUNTU, CentOS, HP - UX, AIX.
• Extensive experience on installation, Configuration, Updating, Support, and Maintenance of RHEL, SuSE Enterprise Linux, CentOS, Debian, Ubuntu, AIX and windows Servers.
• Extensive experience in Installing, Configuring and Trouble-Shooting in IBM Web sphere 3.5/4.0/5.0 and Web Servers like IBM HTTP Web Server, iPlanet Webserver on Linux and AIX.
• Knowledge of Racked, Stacked, Cabled and Supported consisting of around 400 server nodes in Data Center environment.
• Configured kick-start and NIM servers for complete Hands free installations experience for RHEL and AIX.
• Handful knowledge in Installation, configuration and maintenance of applications in Apache Web Server integrated with Tomcat using mod jk Version control in Subversion (SVN), CVS
• Expertise to operate system monitoring and software installation tools including Nagios, RPM, yum, apt-get, yast, and autoyast.
• Actively involved in designing and deploying of PCI requirements.
• Implemented Postfix Mail server used tools PostgreSQL Virtual mail box, Dovecot IMAP, SASL authentication, and Squirrel mail for webmail access.
• Experienced in supporting database systems including Oracle, MySQL, PostgreSQL on Linux/Unix, and Windows environment.
• Experienced in implementing and administrating in Virtual servers including VMware ESX server and Xen.
• Knowledge of Installation, configuration and maintenance of JBOSS Application Server.
• Knowledge in monitoring and utility scripting for automation and monitoring using Shell & Perl scripts.
• Extensive experience in RPM build package, Kernel update, Kick Start & remote network installation
• Routine maintenance with latest Security updates and software update.
• Setup IP routing using IPTABLES, Port forwarding, Firewall and Internet load balancing on Multiple ISP.
• Knowledge of EMC CLARiiON SAN, NAS, and DAS installed & configured, implemented clustering, high availability (HA), and fail over.
• Hardware support for high-end servers built by IBM, SUN, Dell, Super micro, and Hewlett-Packard (HP) servers.
• Experience in setting up a PXE boot environment with Red Hat Linux and SuSE.
• Experience in maintaining and supporting production servers.
• Possess strong analytical and troubleshooting capabilities, proactive listener and team player with positive approach and excellent grasping power.

TECHNICAL SKILLS:

Operating system: RHEL 4.x, 5.x, 6.x Centos 4/5, SuSE 10/11, Windows XP.

Web / Application Server: Tomcat, Apache

Cluster Server: Veritas Cluster

Languages: HTML, Bash, Python &Shell Scripting

Virtualization: VMware and Vsphere

Networking: LAN, WAN, TCP/IP, VOP, NIS, OHS, DHS, DHCP, NAS, and SAN

Monitoring Tools: Hobbit, Nagios

Firewall: IP-chains, Iptables, NAT

Services: SSH, SFTP, FTP, NFS, RPM, YUM, SAMBA, Telnet, Auto FS

PROFESSIONAL EXPERIENCE:

Confidential, Denver, CO

Linux Administrator

Responsibilities:

• Installation, configuration and update REDHAT LINUX 5.x, 6.x, SUSE LINUX 9/10.
• Upgraded REDHAT LINUX from 3.9 to AS 5.2 on 41 PROD nodes successfully.
• Involved in applying new patches and packages for Solaris and Linux Servers and handled issues arising out of them.
• Solved tickets related issues, User creation, Accesses, Permissions, file system creations and enable and removing monitoring for file systems.
• Worked as an On Call support for 400-node environment on a rotation basis for a week in a month for 24X7 hours.
• Patched all the HP-UX environment with DEC 2010 patches as the part of proactive patching in the environment also patched LINUX servers.
• Implemented NFS, DHCP, SAMBA, HTTP, FTP, PXE BOOT and HP Service Center for administrative and project requirements.
• Monitored the hardware daily in Insight Manager for all the nodes in the environment and worked with vendors for issues with hardware.
• Worked with the technical writer to finalize the documents and wrote Technical documentation for various projects.
• Setup file system quota, created users, manage user permissions and maintain User on Red hat Linux, SUSE and AIX.
• Administered multiple IBM machines (P570, P590, P630, P670, P690) running on AIX 5.1/5.2, coordinated with application team to Upgrade from AIX 5.1 to AIX 5.2.
• Involved in installation, configuration and preparation of technical design specifications of RED Hat Linux and IBM AIX Servers.
• Used fiber attached SAN storage to administered UNIX systems for clustered AIX servers running Dynamic LPAR's
• Communicated vendors to solve the issue and worked with OVO and performance issues with application, DBA and network people.
• Implemented Clustered nodes in upgrading OS, Applying Patches, Updating application and Removing applications.
• Audited the servers after the installation and prepared documents.
• Worked on EMC disk storage to allocate disk space.
• Wrote Bash and K shell SCRIPTS for deploying SSH KEYS, Automate Post installation things in LINUX, maintain the systems by keeping some scripts in Cron jobs.
• Worked on VEA, VCS, SNMP up gradation, VERITAS MP2 up gradation and issues involving in them with Symantec.
• Using various stat commands (vmstat, iostat, prstat, prtconf, prtdiag, iostat, dmidecode, sar etc) to monitored server and application performance and tuning & tuned I/O, memory etc.
• Installed and Configured HP-UX 11.23 from IGNITE server and Installed VCS and VxVM on them.

Environment: Red Hat Enterprise Linux 4.x/5.x, SUSELinux 9/10, AIX 5.x, Logical Volume Manger for Linux and AIX, VMware ESX Server 3.5/4.0, Samba 3.0, Veritas Netbackup, Apache 2.0, HACMP, HMC, ILO, RAID, Web logic, IBM P570, P590, P595, Dell 2400, 2450, 2850, 2950.Hitachi disk Arrays.

Confidential, Dallas, TX

System Administrator

Responsibilities:

• Performed installation, configuration and maintenance of Red hat Linux 4.x, 5.x.
• Operated HP and DELL servers running on Red hat Linux and SUSE Linux 9/10.
• Increase Linux kernel memory, preformed kernel upgrades and swaps area.
• Hands free kickstart installation Red hat Linux.
• Administrated, configured and maintained DNS, DHCP, NIS, NFS in Red hat Linux other Network Services.
• Using various tools to design and test a Disaster Recovery solution for all business critical applications and systems, including AIX, Linux and Solaris systems.
• Using VMware virtual infrastructure, VMware ESX to consolidation and virtualization in servers.
• Administering, bulding, monitoring and troubleshooting IBM AIX 5.1, 5.2, 5.3, RHEL 4.x/5.x, Windows 2000/2003 servers on P-Series, Dell and Compaq hardware platforms.
• Installations of Oracle to preform kernel tuning on AIX systems
• To develop and test performed DBAs to configure File Systems, users and group for Oracle Database on AIX servers and performed health check on various instance type from production.
• Performed ‘ndd’, 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc to trouble shooting network.
• All the required Software, patches, documentation, licensing troubleshooting are installed.
• Performed Network Monitoring tool Nagios.
• Setup environment variables/security to ensure smooth operation and create various user profiles.
• Good understanding of web services software architectural and design issues.
• Monitored overall system performance, performed user management, system updates and disk & storage management.
• Production support of including installation, configuration, management and troubleshooting of Apache and Jboss.
• Administrated and configured full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, and print servers to insure optimal networking, application, and printing functionality.
• Installed and configured Sudo for users to access the root privileges
• Performed troubleshooting of CPU bottle necks, memory bottlenecks and gave suggestions on performance improvements.
• Tuned scheduler algorithms using Schedtune to fine tune priority formulas.

Environment: Red hat Linux 4.0,5.0, AIX 5.1/5.2/5.3,VMware ESX Server 3.5.0, JBOSS, Remedy, EMC Power Path, Sun Solaris 8,9,10, Solstice Disk Suite, Veritas Cluster Server, Enterprise Security Manager, Opsware, Web logic 8.1, Oracle 9i/10g.

Confidential, Dayton, OH

Linux Administrator

Responsibilities:

• Worked in Datacenter Lab1 to managed 200 server nodes.
• Installed, Compiled and Build PostgreSQL database 8.3.1 and written shell script for startup in SuSE Enterprise Linux 10sp1 Supermicro dedicated server 6015B-3R for Fortress platform development Lab, app and QA team
• Build two new VMware ESX Server 3.0 & 3.5 in Supermicro server 8045C-3R using Guest OS Red Hat Enterprise Linux.
• Created different virtual machine like Debian, windows 2003 & 2008 server, SuSE enterprise Linux using VMware Virtual Infrastructure Client 2.0 & 2.5 tool and configured with CLARiiON storage box
• Worked on troubleshooting virtual machine issues installed and configured system-monitoring tool and used Nagios.
• Managed F5 system Used IPMI (Intelligent Platform Management Interface) tool for accessing Supermicro server.
• Deployed and configured Jboss application server.
• Performed Fabric and Device management tool to maintained 15 VMware ESX server connected with two EMC CLARiiON SAN box and managed of two Cisco MDS 9000 switch.
• In Supermicro server 8405C-3R configured Virtual disk RAID 0, and RAID 1.
• Installed VMware ESX server for SAS controller firmware and new BIOS updated in Supermicro server.
• Bugzilla, Media Wiki, SVN running are supported in Red Hat Enterprise Linux
• All server list, installation, configuration steps are documented
• Solved installation errors for Debian 3.1 Sarge version kernel 2.6.22 in Supermicro servers for Apache2 web server/ruby/python
• Implemented PXE boot server for network boot loader in SuSE and Red Hat Linux
• Maintained DNS & NTP, MySQL database servers

Environment: SuSE Enterprise Linux, Red Hat Enterprises Linux, Debian GNU Sarge & etch, CentOS, Apache, Jboss, Tomcat, SVN subsystems, PostgreSQL, MySQL, Media Wiki, Bugzilla, Supermicro & Dell Servers, Windows, F5, VMware ESX Server 3.0.1 & 3.5.0

Confidential, Phoenix, AZ

Linux System Administrator

Responsibilities:

• Managed server nodes running SuSE Linux, for application bioask.com
• Installed and configured DNS server using bind9 for multiple domain like bioask.com, serendio.com, and Svapas.com
• Implemented Internet load balancing on Multiple ISP, Firewall, Port forward, IP routing using IPTABLES
• Wrote shell scripts for system backup Rsync, ssh, crontab
• Installed, configured and maintenance PostgreSQL for bioask.com application data, postfix mail server data
• Implemented Postfix mail server and used Dovecot IMAP/POP3 protocol, SASL authentication (SSL using openSSL), n number of Virtual Mail box created in PostgreSQL, webmail access configured using squirrel mail, and add/change and remove domain and mail id using Ruby on Rails
• Implemented Version Control by using SVN Subsystems and WebSVN
• Performed server rack mounting and managed /retired old rack optimized servers
• Installed SSL for mail server and web server
• Wireless Router configuration (http, https, SSH port enabled).
• Implemented Bug tracking system by using Bugzilla for bioask.com application
• Installed and configured LAMP (Linux, Apache, MySQL, PHP) for different application like bioask.com, serendio.com, and svapas.com
• Setup Lightweight Directory Access protocol (LDAP) for user authentication integrated with Postfix mail server, and Apache web server
• Performed Project Management tasks by using dot Project open source
• In window putty tool is performed to remote server maintenance by using SSH.
• Installed and configured VMware workstation successfully for testing team
• Monitored servers and responded to alerts from Nagios Monitoring Software
• Installed RPM package, update and upgrade using YUM
• Written shell scripts to automate system maintenance tasks for Linux clusters
• Responsible for maintaining a production environment that included: Linux, Windows, PostgreSQL, MySQL, Apache, router configuration and monitoring
• Password-less setup done for SSH login using ssh-keygen tool

Environment: Linux: Ubuntu, SuSE, Red Hat, Debian, LAMP, Tomcat, SVN subsystemsPostfix Mail Server, PostgreSQL, Media Wiki, Bugzilla, HP Server, Eclipse, Perl, Ruby on Rails, Thunderbird, Java

Confidential

UNIX System Administrator

Responsibilities:

• Responsible for the Database / Network operation with 8 server and 120 Desktops
• Block unwanted sites and Setup Squid Proxy Server for Internet sharing.
• For user authentication, syslog domain, and file sharing maintained Samba File Server
• For outsource business consultant setup VOIP 8 port Audio code
• Installed and configured Citrix Metaframe XP Presentation Server, Terminal Server to published ITMS application for demo and also used WebEx
• Setup Clustering for Linux servers
• Setup VPN for external team
• Used lilo and fsck to resolved server issues using rescue mode, and single user mode
• Assisted the development team and reviewed the required maintenance tasks
• Responsible for Connectivity issues among various Servers and various software components
• Storage
• Implemented SAN and DAS dual port SCSI interface on Linux and Windows using LSI20320 SCSI card
• Added new hard disk, created new file system, & Logical volume management (LVM) and mounted
• Used Infotrend Eonstor A08U-C2412 (SCSI-SATA RAID Storage Array) Software Infotrend RAID Watch 2.2.A, 400+500GB Hitachi SATA Disk Used SCSI VHDCI 68 (Very High Density Cable Interconnect) cable

Environment: Red Hat Enterprise Linux, Oracle, PowerBuilder, Toad, Windows 2003 Server, Java, Trend Micro Antivirus, Dell PowerEdge1300, 1500, Acer Server, Citrix, VOIP, WebEx

Confidential

Jr. System Administrator

Responsibilities:

• Installed and configured Red Hat Linux Server and performed Hands free Kick-start installation
• Installed and configured DNS Server for and Configured DHCP
• Installed and configured Samba Server for file and printer sharing
• Implemented Network File System (NFS) for file sharing and network installation
• Implemented Network Information System (NIS) for user authentication
• Installed and configured oracle 8i on Red Hat Linux server
• Uploaded and downloaded files between Remote and Local servers using FTP
• Installed and configured Apache/Tomcat/Java/MySQL for the e-learning projects
• Installed and configured Squid proxy for net sharing
• Configured the Software and Network on AIX RS/6000 machines
• System Backup and restore
• Defined and managed subsystems (Printing, networks….)
• Managed system resources (for example, disk space)
• Documented system configuration
• Scheduled backup for server
• Planned Pre installation for system policies and storage allocation

Environment: Red Hat Linux 7&8, Windows 2000 Server, Solaris 8, IBM AIX, Star Office Suite, Oracle 8, Java, Apache, MySQL, Tomcat