SUMMARY

• Experience in Networking and configuring TCP/IP, DNS, NFS, NIS, NIS+, SAMBA, LDAP, SSH, SSL, SFTP, SMTP, SNMP
• 7+ years of Strong Experience in SYSTEM Administration with expertise in Linux, Solaris, familiar with Windows and IBM AIX.
• Expertise in Installation, Configuration, Tuning, Backup, Crash recovery, Upgrades, Patching, Monitoring System Performance, System and Network Security and Troubleshooting of Linux/Unix Servers.
• Experience in building, maintaining and troubleshooting oracle RCA clusters.
• Used Kickstart, Cobbler,Jumpstart, VMware Templates and cloning techniques to install OS.
• Expertise in migration like RHEL 5 to RHEL 6,Phyical to virtual migration, cross platform migration Solaris/RHEL to Centos.
• Experience in Major and Minor upgradation of operating system.
• Expertise with virtualization like Xen, KVM, VMware .
• Experienced with teh installation, configuration and volume/File system management using VERITAS Volume Manager (VxVM), Logical Volume Manager (LVM) and Solstice Disk Suite (Solaris Volume Manager).
• Experience in creating physical volume, logical volume, volume groups using LVM’s in Red Hat Enterprise Linux, GFS (global file system) and ZFS in Solaris.
• Configured file systems through network using NFS, NAS, SAN methodologies and installed RAID devices.
• Extensive experience with configuration management tools like puppet and chef.
• Exposure to Application deployment and Devopsmethodologies.
• Proficient in Automation using crontab and tool like Autosys.
• Good noledge on cloud computing products such as Amazon (EC2).
• Scripting/programming experience shell, c/c++and python.
• Installation and configuration of Web Application servers like Apache, Tomcat and Web logic.
• Good understanding of version control tools like SVN,GIT.
• Experience in using monitoring tools like Nagios, Splunk and Check mk.
• Solid understanding of RPM, building, maintaining, and installing packages.
• Working Knowledge on using and developing basic shell and python scripts used to automate day to day administrative tasks.
• Handling day - to-day User Administration tasks like adding, deleting and modifying user data and documenting all user data in a centralized location.
• Experience in trouble shooting and Performance tuning by working closely with Application, Database, Network and Storage Teams
• Performance tuning of Linux machines in teh environment by kernel parameter tuning, identifying process dat hog teh system resources and containing them.
• Writing and maintaining technical for new and existing projects.
• Worked in maintaining integrity of Linux, Solaris servers by performing patching operations on a regular and planned way.
• Working noledge on Firewall scripts and securing Linux productions systems.
• Working with project managers, DBA's, Developers, Application support teams and operational support teams to facilitate effective project deployment.
• Ensure 24x7x365 service uptime.
• Installation and configuration of web hosting administration such as FTP, SSH, RSH, Telnet, and HTTP.
• Installing and upgrading VMware tools on client machines.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6, OEL 5/6, Centos 5/6, Solaris 9/10, Windows 98/XP/Vista/7/8, Windows Servers 2000/2003, IBM Aix.

Virtualization: VMware, Xen, KVM.

Networking: TCP/IP, UDP, LAN, WAN, NFS, NIS, LDAP NIS+, DNS, DHCP, NAS, SAN.

RDBMS: SQL, Oracle, MySQL.

Language: HTML, C/C++, SQL, Bash, Python & Shell Scripting.

Management Tools: Puppet and Chef.

Monitoring Tools: Nagios, Splunk, Check mk.

PROFESSIONAL EXPERIENCE

Confidential, Richardson, TX

SrLinux/Unix Administrator

Responsibilities:

• Installation, Maintenance, Administration and troubleshooting of Red Hat Enterprise Linux 5/6 and Oracle Enterprise Linux 5/6 systems.
• Responsible for building of new servers which includes rack mounting, installation of OS, configuring of various OS-native and third party tools, securing of OS, installing & configuring, job scheduling.
• Reduce Server build time from 8 hours to 3 hours by using Kickstart Techniques,automating pre and post build tasks.
• Installation, configuration of Oracle RAC for multiple computers to use single database on Oracle enterprise Linux 5/6.
• Supported Oracle 11g, 12c RAC and responsible for 99.97% uptime.
• Extensively worked on hard disk mirroring and stripe with parity using RAID controllers.
• Assisted with migration of from Solaris to Linux.
• Involved in Server sizing and identifying, recommending optimal server hardware based on User requirements.
• Installing, administering Red Hat using Xen, KVM based hypervisors.
• RPM and YUM package installations, patching and other server management.
• Built virtualized Linux servers on ESXi, Vsphere and Blade servers to host multiple applications on same chassis across different server hosts.
• Installed, configured, and maintained WebLogic 10.x Red Hat Linux.
• Used Puppet tool for managing system configurations.
• Used various cloud computing products such as Amazon Web Services EC2.
• Monitoring CPU, memory, iSCSI disks, disk controllers, physical disk, HW and SW RAID, multipath, file systems, network using teh tool Check mk and Splunk .
• Set up Red Hat Linux servers for iSCSI LUN boot instead of using local hard disks.
• Created File systems from local storage as well as NFS partitions for application portability.
• Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging.
• Automated Jobs using tools like Autosys.
• Design and implementation of Disaster Recovery systemfor various servers and applications.
• Remote monitoring and management of server hardware.
• Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
• Installing and configuring Apache and supporting them on Linux production servers.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Worked on resolving production issues and documenting Root Cause Analysis and updating teh tickets using BMC Remedy.
• Designing Firewall rules for new servers to enable communication with application, Oracle 11g/12c servers,
• Monitored server and application performance & tuning via various stat commands (vmstat, nfsstat, iostatetc) and tuned me/O, memory, Confidential .
• Coordinated with teh Storage, Network and Hardware teams on server provisions (HP Proliant DL385/585 G5, G6 servers, and HP BL 465C G5 blade centers) and dell M520 and M620.
• Experienced in Troubleshooting critical hardware and software issues and other day-to-day user trouble tickets.
• Network logging of servers for maintenance, performance tuning, testing.

Environment: Red Hat Linux Enterprise servers, Oracle Linux servers (HP Proliant DL 585, BL 465/485,ML Series), BladeLogic, Oracle 11g,12c RAC, Shell programming, VMware Virtual Client, VMware Infrastructure .

Confidential, Sacramento, CA

SR Systems Administrator

Responsibilities:

• Involved in installation and configuring Solaris 9/10 using Jump start server and Red Hat Enterprise Linux 4/5 servers using Kickstart server as required for teh project.
• Installed and configured multiple host on a single machine using VMware vSphere and saved around $100K over teh period.
• Creating, cloning Linux Virtual Machines, templates using VMware Virtual Client 3/4 and migrating servers between ESX hosts.
• Responsible for ensuring 99.9% uptime and full functionality of 140 servers.
• Migrated from RHEL to Centos in testing environment and thereby cutting down licensing costs.
• Maintained maximum uptime and maximum performance capacity for Enterprise Production, QA, and UAT/Staging.
• Configured Sun servers M4000 and M5000 for operational readiness upon OS installation.
• Incident management for Unix Servers (Solaris, Linux).
• Installed and configured Solaris 10 servers with Zones and containers with Sun ZFS.
• Installing, administering Red Hat using Xen, KVM based hypervisors.
• Implemented multi-tier application provisioning in OpenStack cloud integrating it with Chef
• Create Chef recipes and Automated system configuration using Chef
• configured and volume/File system management using VERITAS Volume Manager (VxVM), Logical Volume Manager (LVM) and Solstice Disk Suite
• Installation, configuration of Oracle RAC for multiple computers to use single database.
• Supported Oracle 10g/11g database and responsible for 100% uptime.
• Custom build of Windows 2003 servers which includes adding users, SAN, network configuration, installing application related packages, managing services.
• Used Cheftool for managing system configurations.
• Primary responsibility includes building and supporting Red Hat Enterprise Linux 4,5 servers.
• Performed configuration and troubleshooting of services like NFS, FTP, LDAP.
• Monitoring CPU, memory, iSCSI disks, disk controllers, physical disk, HW and SW RAID, multipath, file systems, network using teh tool NAGIOS.
• Performed regular installation of patches using RPM and YUM.
• Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, and WebSphere servers.
• Implemented SUDO, SSH and other security tools and implemented SOX (Sarbanes Oxley) security compliance.
• Assisted in configuring teh application servers with other components such as database, web servers, LDAP directory, Active Directory, BEA Web logic Confidential .
• Extensive use of Bash shell for scripting.
• Performance monitoring and Tuning using top, prstat, sar, vmstat, ps, iostat Confidential .
• Linux backup/restore with tar including disk partitioning and formatting.
• Created zpools. Exported ZFS from local zones to local zones.
• Regular disk management like adding /replacing hot swap able drives on existing servers/workstations, partitioning according to requirements, creating new file systems or growing existing one over teh hard drives and managing file systems.
• Planned, scheduled and Implemented OS patches on both Solaris & Linux boxes as a part of proactive maintenance.
• Worked with other IT teams, customers (users), and other managers in halping build and implement systems and standards.
• Involved in migration of projects from one flavor to another one.
• Involved in development, user acceptance, and performance testing, production & disaster recovery server.

Environment: Solaris 9/10, Red Hat Linux 4/5,Centos 5/6 BMC Tools, NAGIOS, Bash Scripting, Volume Manager, web servers, LDAP directory, Active Directory, BEA Web logic servers, SAN Switches, Apache, Tomcat servers, WebSphere application server.

Confidential, Cincinnati, OH

Linux/Solaris Administrator

Responsibilities:

• Building of Linux/Solaris OS servers using kickstart /jumpstart automation application.
• Creating and cloning virtual machines in VMware environment using Virtual Infrastructure client 3.5.
• Patching and upgrades of existing Linux Machinesvia yum and RPM
• Maintained IBM AIX servers.
• Worked extensively with (NFS) for storage
• Coordinate scheduled patching maintenance
• Log management like monitoring and cleaning teh old log files.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Creating physical volumes, volume groups, and logical volumes on SAN luns.
• Install and configure Apache, tomcat for web server environment.
• Responsible for on-site installation, implementation, maintenance and repair of company and multi-vendor systems solutions.
• Configured and maintained DNS and DHCP services.
• Monitor teh file systems and CPU load for better performance.
• Recovery of systems due to system panics. Volume group recovery due to volume group configuration corruption.
• System audit report like no. of logins, success & failures, running cron jobs.
• Configure Nagios for server monitoring
• Writing bash scripts for job automation.
• Working 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.
• Maintained LVM, VxVM and SVM file systems along with NFS.

Environment: Linux 4,Solaris 8,AIX5, VMware, Network File System, patching, DNS, DHCP,Apache,Tomcat, Nagios, performance tuning.

Confidential

Linux Administrator

Responsibilities:

• Installed RHEL 3.0/4.0using kickstartand custom building teh servers with 0, 1& 5 RAID configurations.
• Configured network interfaces, routing table, NFS and DNS configuration and basic network troubleshooting
• Installed and maintained Security issues.
• Installed VERITAS Volume Manager, VCS Cluster Server for fail-over and for mirroring and raid level configurations on EMC storage frames.
• Performed all System Administration tasks like cron jobs, installing packages, and patches.
• Configured Mail relaying, virtual host, POP3 and IMAP4 services and enforced security policies.
• Configured and installed Auto mount and Jumpstart.
• Diagnosing hardware/software problems and provide solutions.
• Configured and maintained Samba Server, NFS Server, NIS Server and clients, DNS clients and Auto Fs File systems.
• Performing tape backups, archiving and checking data integrity through Shell Scripts and job automation.
• Supported back office systems environments.
• Testing and upgrading production, development and test Linux and Solaris servers.
• Creation & Maintenance of user accounts & passwords & profiles, home directories, initialization of files, groups’ creation and management, setting file permissions, customizing shell environment setup for users.
• Additional responsibilities include schedule and administration of server backups, setup and administration of network and ms mail accounts.
• Troubleshooting various problems related to VxVM in initializing, replacing, mirroring, encapsulating and removing disk devices on various Production Boxes.
• Maintaining production critical servers running Solaris UNIX, Linux supporting Oracle database and Web services. Providing 24x7 supports.
• Worked efficiently using VERITAS NetBackup on development and production servers for backups and restores.
• Created LVMs on Linux servers.

Environment: HP Proliantservers, RHEL 3.0/4.0,Samba, NFS, DNS, LVM, Linux, Shell Programming, VERITAS Volume Manager.