PROFESSIONAL SUMMARY:

• Over 8+ years of experience specialized in system administration working on RedHat Linux, CentOS, Solaris - 11.3, Ubuntu (server/desktop), SUSE Linux, AIX, Fedora, HP UNIX and Windows environments.
• Working experience on RedHat Enterprise Linux, experience working with various Development and Testing teams in Agile Process Model Project Eco System.
• Expertise in building, configuring and troubleshooting RDS Instances in cloud and On Premise
• Experience in Installation, Configuration, Backup, Recovery, Maintenance, Support of Linux Servers and Windows Servers.
• Creating, maintaining Active Directory Services, Roaming profiles, security Parametes, Disk Quota management, rights, backup of data and Disaster Recovery.
• Experience in Installing, upgrading and configuring RedHat and centos using Kickstart servers and interactive installations, also administered server consolidation program through the use of VMware virtual center.
• Experience in Installation, Configuration, Implementation, Upgradation, Maintenance & Troubleshooting JBOSS, WebSphere Application Servers, Web Logic server, Oracle, Apache web server and Tomcat.
• Expertise in Package management and patch management using custom repo artifactory using with yum and apt-get
• Experience in Shell/Perl Scripting languages like Bourne shell, Korn shell and BASH.
• Hands on experience in building and maintaining VOIP application servers like Asterisk, Freeswitch and Kamailio.
• Good exposure to Network Storage Solutions like NAS, LDAP, Route53, DNS, DHCP, Load Balancing, Multi AZ Deployment and SAN.
• Experience in Linux Printer management using CUPS and SAMBA CLIENT with Windows server.
• Understanding of and ability to script in shell with languages like Bash, Python, Perl as required for automation, monitoring and to enhance the access and performance of the system.
• Experienced in Disk space management (create, extend, reduce and deleting Volume groups & Logical volumes) using Logical Volume Manager (LVM)
• Hands on experience on installing, configuring and troubleshooting DNS, FTP, NFS, DHCP, VNC and Telnet servers
• Worked on protocols like HTTP, SIP, TCP, UDP, RTP, SNMP
• Generated and Installed the SSL certificates for the website to make it secure with HTTPS
• Well versed with Linux utilities such as SSH, FTP, user management, patch management, memory management, quota management, swap management
• Experienced in installation and configuration of Samba, Sendmail & Procmail, Apache web server, Tomcat web server.
• Log and CPU performance monitoring with Splunk, ELK, Nagios and Zabbix
• Deployed Docker Engines in Virtualized Platforms for containerization of multiple apps
• Worked with Ansible playbooks for virtual and physical instance provisioning, configuration management, patching and software deployment
• Extensively worked with automation tools like Hudson, Jenkins, Teamcity and Build Forge to implement the End-to-End Automation
• Experience in manage cloud software deployments, with a focus on continuous integration and deployment using GitHub, Jenkins, Bamboo, SVN and Maven.
• Very good understanding on NOSQL databases like Cassandra, Zookeeper, Spark andHBase, MongoDB.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6, Microsoft Windows 2000/NT/XP/Vista, Fedora. Windows 98, 2000,2003,2008/2010, Ubuntu 12.x/13.x, Sun Solaris 8/9/10, HP-UX 11, IBM AIX 5.x

Programming Languages: Unix Bourne Shell, Korn Shell, PL/SQL, python, awk, Java script, HTML, PHP, Perl, Ruby.

Hardware: IBM RS/6000, pSeries 520, 550, 570, 575, 590, 595, 650, 630,670, M80, S80, H70 and H80, z/VM-9 series, IBM ESS (Enterprise Storage Server), DS8000, IBM 3494, 3583 Automated Tape Library, Brocade, SUN Enterprise 450, Sun Fire 4500,V880, V480,E420R,E450,E250, HP DL 380s and 580s,EMC Symmetrix, Hitachi arrays, Backup Devices, Ethernet Hubs, Routers, Repeaters, Jukebox, Printers DELL Poweredge 1650, 2850, 2950, 6400

Software: Veritas Volume Manager 3.5/4/5, Veritas File System, Veritas Cluster Server 3.x/4.x, Veritas Netbackup 6.0, MS-Office/MS-Project.

Web Servers: Apache/TOMCAT Web Server Administration, DNS, Sendmail.

Security: TCP/IP Wrapper, IP Tables, SELinux.

Virtualization Tools: VMWare ESX 3.0.1 & 3.5.0 Server, vSphere, VMware Infrastructure Client 2.5 &Xen 3.2Network Protocols TCP/IP, HTTP, SSL, SNMP, SMTP, FTP, SSH, DHCP,UDP, TELNET, Firewalls, Cisco Routers/ Switches.

Storage Devices: SAN, NAS, SUN ZFS 7420/7320, EMC Power Path 4.0, VERITAS SAN Point Manager, VVM 3.1/3.2/4.0, RAID Manager

Backup Tools: Tivoli Storage Management (TSM), Avamar

Databases: Oracle 9i/10g, 11g, DB2, SQL Server

Application servers: WebLogic/WebSphere, Jboss, Apache, Tomcat.

Clustering Software: Red Hat Cluster Suite, VERITAS Clusters, Sun Clusters, AIX HACMP.

Storage Appliances: Netapp (Ontap versions 7.x & 8.x)

Configuration Management Tools: Puppet, Red hat satellite server

Third-party Software: VERITAS Volume manager, LVM, LDAP

Antivirus: Symantec Antivirus Corporate Edition, Trend Micro Messaging Suite for Exchange, MacAfee Virus Scan Engine 7.1 / 8i, AVG (Grisoft)

Remote Access Tools: Terminal Services, Net Meeting, Web - Ex, PC Anywhere and VNC for Windows Servers.

Other Tools Tools: Nagios, IPMI, CUPS, Samba, Firewall (Squid, IPTables), FTP, Kick Start, Jump Start, rsync, SVN, splunk, autosys / uc4, TPM, VAS Chef, Puppet, Jenkins, Vagrant, Docker, Maven, Gradle, Ansible.

Cloud: AWS, Microsoft Azure and Rackspace, Openstack.

PROFESSIONAL EXPERIENCE:

Confidential, CA

Sr Systems Engineer/ Devops Engineer.

Environment:: Red hat Linux 4/5/6 ES 4.0/5.0,Hp Unix 5.1, Veritas Volume Manager, SAN, Samba, NFS, VMware ESX, Apache, Tomcat and Jboss, Veritas Volume Manager 4.0, DELL R620/PowerEdge2950 Veritas Cluster 4.x, Tivoli Storage management and WebSphere servers, and SAN storage, HP C7000, HP Blades BL460c Gen8, DELL R620/Poweredge2950, HPSA, SUSE Manager, VMware,Centrify, SLES 9/10/11, RHEL 5.x/6.x., Win 2008 R2/2012,Bigdata( Cassandra/ Gluster ), DELL R620/R720, HP DL 380 G3/4/5,RedhatCloud Forms.

Responsibilities: -

• Creating volume groups, Logical volumes and extending them using LVM.
• Working with HP XEN Blade Servers. Attaching disk space from DL-360 blade servers to VMs.
• Installed and managed VMware ESX 4.5 hosts running RHEL 5,6 versions.
• Installed and configured Splunk for all kind of Application, System logging so that various support team can get information online instead of combing the log files.
• Managed splunk user interface
• Created Reports, Alerts and Dashboards in Splunk
• Analyze Logs with Splunk
• Installed, configured, and maintained WebLogic and Oracle DB Servers on OS Redhat Linux and AIX.
• Responsible for setting up new instances, migrating existing services from physical servers to AWS cloud.
• Administered and Engineered Jenkins for managing weekly Build, Test and Deploy chain, SVN/GIT with Devel/Test/Prod Branching Model for weekly releases
• Configure, monitor and, maintain AWS VPC environment.
• Working with SAN team for exporting shared volumes and mounting shared volumes.
• Installing and Configuring Puppet for configuration management.
• Worked on Puppet to organize and execute configuration plans on servers & worked on modules of Puppet for its manifests on servers.
• Create, maintain and manage automated build processes for AWS environment using Puppet.
• Installed Chef-Server Enterprise On-Premise/WorkStation/ Bootstrapped the Nodes using Knife and automated by testing chef recipes/cookbooks with test-kitchen/chefspec/serverspec
• Used tools like CodeCommit and CodeDeploy for aws.
• Developed scripts for automating administration tasks like customizing user environment, and performance monitoring and tuning with NFSSTAT, NETSTAT, IOSTAT, and VMSTAT.
• Migrated few physical servers to cloud based service azure
• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as LAN and TCP/IP, supporting users in solving their problems.
• Configuring, Managing and Scheduling CRONTABs for App Accounts and Backup management on a regular basis.
• Installed and configured Apache Web Server.
• Installed and deployed Weblogic and Websphere Application Servers (WAS).
• Installed and configured RAC databases on Solaris and in zLinux environment.
• Moved non ASM databases to ASM.
• Maintained database by marketing MongoDB.
• Leveraged Docker Engine to run Multiple Tomcat Instances as Containerized AppServers
• Migrated database on Solaris from Global to local zone.
• Migration of database between Solaris/zLinux/Linux.
• Installation of Oracle on Solaris and zLinux.
• Created Bash shell scripts to monitor system resources and system maintenance and performed administrative tasks such as System startup/shutdown and Backup strategy.
• Created Disk groups, initialized physical disks to create a Veritas File System (VxFS).
• Import and Deport disks into a disk group depending on the requirement using the vxassist utility on the Veritas Volume Manager.
• Wrote Ansible Playbooks with PythonSSH as the Wrapper to Manage Configurations of Openstack Nodes and Test Playbooks on AWS instances using Python and also used Ruby for scripting.
• Preparing servers for Oracle RAC installation, which includes creating ASM disks, Kernel tuning, agent installation, adding NAS storage.
• Managed User and Application Account creations, deletions, and setting up sudo access for DBA and application account access.
• Experience with running SQL queries on Oracle and MySQL.
• Administered security, users, group administration and daily backup and restore operations, networking service, performance and resource monitoring and performed disaster recovery management procedures.
• Administration responsibilities include user, group, disk, and security management.
• Involved in preparation of functional and system specifications. Estimated storage requirements for applications.
• Worked with DBA team for database performance issues, network related issues and with vendors for hardware related issues.
• Worked with DBAs on installation of RDBMS database, restoration and log generation.
• Managed shared NFS, mounting and un-mounting NFS server, NFS client on remote machine, sharing remote file folder, starting and stopping the NFS services.

Confidential, IL

Sr Systems Administrator/ Devops Engineer

Environment: Red hat Linux 5, 6, CENTOS, Oracle 10g/11g RAC, JDK 1.5, 1.6, VMware Virtual Client 3.5, AIX 5.3, 6.1, Windows Server, XP, 07,08, VIOS 2.1, 2.2, HACMP, IBM RISC (POWER) Servers IBM P5 520, 550, 570, P6 520, 550, 570, P7 710, 720, 740, IBM X Servers X220, X240, X2950, X3200, X3400, X3550, X3650, X3650M2, X3650M3, X3650M4, X3850. IBM Blade Servers, DNS,NFS,SMTP, Web server Apache 1.3x, Application server Jboss, Sun Solaris 10,SunFireV480/V490/V240/F4800/E2900, M3000, M4000, HP DL380 G5, HP DL360 G4, VMware,vSphere4.1/5.1,Puppet,Redhat5.6/5.8,SuSELinux 10/11. Configuration management tools Puppet and satellite server.

Responsibilities: -

• Worked as Administrative support for 150 odd Linux/Solaris running WebLogic Suite applications, variety of business applications.
• Receive the TADs (Technical architectural diagrams) from web engineers
• Work on the change tickets to be created for necessary VIP binding, DNS entries creation & DB crypto vault labels creation
• Building the JVMs as per the TAD structure
• Configuration of all data sources, certificates as per the TAD
• Apache installations and configurations as necessary as per the TAD
• Deploying applicationsi.ethe code provided by application team
• Install, configure,and maintainRHEL 5.x/6.x, SLES 9.x 10.x 11.x, Win 2008 R2/2012 as a part of ecosystem isolation infrastructure project.
• Migrated VMWARE VMs to AWS and Managed Services like EC2, S3 Bucket, Route53, ELB, EBS Etc with Opscode Chef Cookbooks/Recipes.
• Worked on Version controller GIT and integration tools: Jenkins
• ProvisionedBigdata(Cassandra/ Glusternodes), Bare Metal and VMs for database, app and web purposes.
• Createopswareimplementation records to populate server specs to kick startfile for PXE boot process.
• Automated server provision to modify server parameters and enable bulk server provisioning.
• Used Dockers tools for instances.
• Setup VAS tool on Linux platforms and add them to their appropriate domains for AD authentication of all users.
• Ensure server communication via network and perform HP server automation communication tests.
• Used Ruby and Perl for scripting.
• Troubleshoot and work with appropriate teams for HP / DELL hardware for network/storage issues.
• Post provision servers to modify system parameters for appropriate purposes and validate them.
• Perform validation tests/QA to ensure consistency prior server delivery to the appropriate teams.
• Build VMs viaRedhatCloud Forms as per the requirement and troubleshoot them for any errors.
• Support systems and prep them for season readiness.
• Tweak scripts to automate post provisioning and server build process.
• Document all changes to improve process for future use.
• Provide 1st and 2nd level support to WIS Linux Infrastructure and the applications running on the Linux and VMware platform.
• End-to-end problem determination/troubleshooting system issues.
• Modify kernel parameters and system settings prior handing it over to appropriate teams..
• Take server backups of significant date prior system patch / upgrade.
• Schedule servers for server patching via SUSE Manager.
• 24 / 7 on call rotation support.
• Tested Puppet Enterprise in lab environment and successfully set up node communication.
• Provision / support VMs via VMwarevSpheresuch as memory upgrades / adding NIC cards etc.
• Worked on adding users toCentrifyActive Directory and manage their privileges.
• Configure SUDO access to users for DBA and APP users.
• Perform performance monitoring and report activity log to senior management.
• Redeployments as necessary based on the requirement from app team
• Helping to app team while they are testing the environments
• Initial routine tasks for PRODenvlike communication and traffic monitoring
• Troubleshooting in all technical issues
• Creating WAGs (hand over documents for support teams) and proving hand over to support teams after project completion
• Created L1, L2 & L3 Support structure and implemented the 24/7 support
• Provided solutions on patch management of 5000 Linux servers
• Handled successfully initial 30 problem tickets and resolved within the SLA and made the other associates used to the similar process of handling the environments
• Performed Installation, configuration of RHEL 5, Solaris operating systems.
• Implementation of several native Linux services like NFS, FTP, DNS, NTP, LVM etc.
• Performed live as well as manual OS upgrade from Redhat 3, 4 to red hat 5 and 6.
• Creating and managing shared disk groups in clustering environment.
• Installation of local yum repository and package administration using yum and rpm.
• User, Group management for all the Linux Servers.
• Setup and management of SFTP server for file transfer services.
• Monitored, Installed packages, patches and secured the server using Red hat satellite server.
• Implemented chroot jailing for users to have restricted access to the SFTP server.
• Installed and configured puppet.
• Working on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager & Solaris Volume Manager. File system Tuning and growing using VERITAS File System (VxFS), coordinated with SAN Team for storage allocation and Disk Dynamic Multi path.
• Network trouble shooting using ndd, trace route, net stat, ifconfig and snoop.
• Worked with firewalls like IPTables.
• Performed OS hardening to make UNIX environments more secure. Installed Center of Internet Security (CIS) benchmark tool to gauge security loopholes and hardened the systems accordingly.
• Setup LDAP Client services on Linux Servers.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Configured Linux Kickstart on multiple servers for network installation.
• Configured Multipath, Powerpath, added SAN, created physical volumes, volume groups, and logical volumes.
• Made backups of the important files using the tar, zip, gzip and compress utilities.
• Created, cloned Linux Virtual Machines, templates using ESXi 5.1, 5.5and migrated servers between ESX hosts.
• Configured and monitored NFS environment.
• Configured NIC Bondings on Linux and IPMP on Solaris for redundancy of network interfaces.
• Creating and cloning virtual machines in VMware environment using Virtual Infrastructure client 3.5 and Vsphere 4.0.
• Involved in administration of Content Management systems.
• Coordinated with database administrators while setting up Oracle 10g/11g on Linux.
• Added disk space and managed various file system on the Linux and UNIX servers.
• Monitored and troubleshot different performance related issues using performance monitoring utilities like IOSTAT, VMSTAT, TOP, NETSTAT and SAR.
• Set up test labs for testing hardware and software compatibility with new releases of OS, application software.
• Installed and configured Jboss application server.
• Scheduling jobs through cron frequent modification to crontab.
• Performed Volume Management using Logical volume management (LVM).
• Acted as liaison between various development teams, DBA and application teams to resolve issues and provide support.
• Maintaining appropriate file and system security, monitoring and controlling system access, changing permission, ownership of files and directories, maintaining passwords, assigning special privileges to selected users and controlling file access, monitoring status of process in order to increase the system efficiency.
• Prepared technical documentation for all set up and configuration steps, architecture Visio diagrams.

Confidential, TX

Sr Systems Engineer

Environment: Red hat Linux 5, 6, CENTOS, Oracle 10g/11g RAC, JDK 1.5, 1.6, VMware Virtual Client 3.5, AIX 5.3, 6.1, Windows Server, XP, 07,08, VIOS 2.1, 2.2, HACMP, IBM RISC (POWER) Servers IBM P5 520, 550, 570, P6 520, 550, 570, P7 710, 720, 740, IBM X Servers X220, X240, X2950, X3200, X3400, X3550, X3650, X3650M2, X3650M3, X3650M4, X3850. IBM Blade Servers, DNS,NFS,SMTP, Web server Apache 1.3x, Application server Jboss, Sun Solaris 10,SunFireV480/V490/V240/F4800/E2900, M3000, M4000, HP DL380 G5, HP DL360 G4, VMware,vSphere4.1/5.1,Puppet,Redhat5.6/5.8,SuSELinux 10/11. Configuration management tools Puppet and satellite server.

Responsibilities: -

• Installation/Maintenance of Hardware/Software in Production, Development & Test Environment as anintegral part of the Unix/Linux (RHEL 5.x / 6.2, SuSE/AIX) Support team.
• Worked on installation, configuration and maintenance of Red Hat, Cent OS, UBUNTU, SUSE, AIX and Windows servers.
• Installed and configured RedHat Satellite server for package transfer across servers, to store client's system profile and to control other servers in the network.
• Configured LVM and managed it.
• Experience with kick start installation on multiple servers.
• Worked with KVM Hypervisor to install, configure and maintain Red Hat Linux Capacity Planning, Infrastructure design and ordering systems.
• Created and scheduled Cron Jobs such as for Backup, System Monitoring and removed unnecessary files.
• Implemented day-to-day tasks in RedHat Linux that include upgrading rpms, kernel, HBA driver, configuring SAN Disks, multipathing and LVM file system
• Installed, configured, maintained and administered the network servers DNS, DHCP, NIS, NFS, SENDMAIL.
• Worked with DBA's to install RDBMS database, restore and generate logs.
• Involved in adding new disks, formatting, partitioning, disk space allocation, monitoring system performance, system tuning, and crash recovery issues.
• Experience with installation and maintenance of NFS, FTP and Samba for file sharing.
• Built Linux servers using VMWare ESX and VMWare ESXi.
• Created Virtual disks/Virtual Target devices to allocate SAN Luns virtually to the VIO clients.
• Experience in creating Control channel, Shared Ethernet adapter and configuring them on the network.
• Set up repositories for Redhat, implemented YUM, SSH and other security tools.
• Application of Load Balancer in the Virtual Linux Server.
• Daily system monitoring using commands like vmstat, iostat, top, tcpdump, defrags and so on for efficient server operation.
• Package management like Install, remove and update and querying packages using RPM tool.
• Used Samba to print and share files in mixed Environment.
• Installed, configured, maintained, upgraded and troubleshooting EMC powerpath on Solaris 10 and Linux.
• Experience with installation of Tomcat and Apache Web Servers on Red Hat Production Servers.
• Monitored trouble ticket queue to attend user and system calls, diagnosed and resolved systems related tasks in accordance with priorities setup in dealing with trouble tickets.
• Installed, upgraded and managed packages as well as the dependencies through RPM.
• Patching and Package administration.
• Implemented RAID techniques and created disk groups and volumes using Veritas Volume manager.
• Maintained Load balancing, High availability, Failover functionality and Disaster recovery included changing of IP address of the web and app server machines, which caused change in virtual host and http transport configurations.
• Involved in extensive trouble shooting the issues by finding out root causes, analyzing core dumps and resolved system crashes.
• Experienced with user account, group account creation, management and allocation of quotas for users and groups as instructed.
• Provided 24/7 on call supports in debugging and fixing issues related to Redhat and SuSE Linux.

Confidential

System Administrator

Environment: HP Proliant servers, SUN Servers (6500, 4500, 420, Ultra 2 Servers), Solaris 7/8, Veritas NetBackup, Veritas Volume Manager, Samba, NFS, NIS, LVM, Linux, Puppet, Shell Programming Red Hat Linux 4/5, BMC Tools, NAGIOS, Bash Scripting, web servers, LDAP directory, Active Directory, BEA Web logic servers, SAN Switches, Apache, Tomcat servers, WebSphere application server, Redhat Linux 4.x5.x6.x AS ES, CENTOS, FEDORA,SUSE Linux 10.311.1,OEL 5.5,DELL PE R900 R910 R710 1950 2650 2950, Oracle 9i/10g/11g,Oracle 10g Data Guard,Samba, NT/2000 Server, WebSphere, Web Logic 8.1, OVS, OVM, DELL IT-ASSISTANT, MS ACCESS,Korn, Bash,VeritasVolume Manager 4.x.

Responsibilities: -

• Installed RHEL 4.0/5.0 using kickstart and custom building the servers.
• Installed/configured EMC Storage with 0, 1& 5 RAID configurations.
• Installed and maintained Security issues.
• Primary responsibility isRemediatingServers running onSolaris8, 9, 10 (Patch Management Planning & Installation).
• Upgrade all the storage associated with the H/W (Veritas,EMCPowerpath)
• Perform day to day support on the server like administration, maintenance,upgradeofRedhat Linux & Solaris, supporting Hardware problems co-ordination with Vendors, performing Securityrelated controls,Fine tuning,Kernel debugging, process scheduling, disk and file system I/O, kernel internals, TCP/IP communications.
• Pre-work requirement gathering that includesOS versions running on the servers, storage attached, IP addresses allocated etc., andcreating server lookup sheets.
• Plan schedules for the week by contacting different clients and notifying them about the outages required.
• Administered, maintainedRHEL 4.x,5.x, 6.x(AS,ES),Solaris 9-10, CENTOS, FEDORA, SUSELinux10.311.1&OEL 5.5troubleshoot hardware, operating system, applications & network problems and performance issues.
• Racking up New hardware(DELLPE 1950 2950 2650 R900 R710 R910 R610) in providedDELL RACSand powering them up.
• EnablingDRACIP ‘sto access console remotely.
• Setting up the disks( internaland external ) inRAIDconfigurationforPRE-OS INSTALL.
• Installed, maintained & performed troubleshoot onRHEL 4.x, 5.x, 6.x ( 32 and 64 bit ),CENTOS, FEDORAetcand configuring them for different purposes such Databases and Applications.
• Setting up, Installing, Configuring servers withOracle VM Serverand creating different Database or Application virtual machines and maintaining them overOracle VM Manager.
• Running different, installing the required RPMS( usingphysical media, virtual mediaandRHN) on new servers and getting them ready for Database creation and Installing Applications.
• Installed VERITAS volume manager and implemented various RAID levels, logical volume creation, mirroring and file systems
• Maintained Separate spread sheets for physical and virtual servers. Worked on getting all the existing hardware into the server database.
• Modification / Installation of scripts include creating different directories, creating users, giving users access permissions and passwords, starting / stopping different services in different run-levels, copying all the configuration files from the central database repository to all the servers, installing / removing Packages( RPMS ), configuringRSYNC( used for faster file transfers ),CA BACKUP CLIENT AGENT - for back up purposes and getting the Servers ready for Oracle Database ( 9i, 10g, 11g ) and Other Application Installations.
• Deployed latest patches forLinuxandApplication servers, performedRed Hat Linux Kernel Tuning.
• Assisted in ServerAutomationtechniques usingHPSAfor provisioning servers.
• Setup network printers and installed client/server applications. Defined/setup network protocols, Network File Services (NFS), and Network Information Services (NIS) in Linux systems
• Network trouble shooting using ‘ndd’, ‘nc’, 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc.
• Provided support by 24x7 shift rotation basis and pager support
• Install and configureDHCP,DNS (BIND, MS), web (Apache, IIS), mail (SMTP, IMAP, POP3),FTP, NFSetcon all Linux servers.
• Setting up servers withCUPSon all manager servers( RHEL4.x, 5.x ) for printing. Created scripts to monitor print queues and notify / alert administrators if there are any idle queues and enable / disable them to restart print queues.
• Monitored trouble ticket queue to attend user and system calls, attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment
• Hard ware maintenance and System Administration on all DELL PE servers.
• Created / Opened tickets withDELLregarding any errors in the server hardware to troubleshoot them for anyCPU / IO ERRORSand replace any parts(MEMORYMODULES, PHYSICAL DISKS, DRAC CARDS, PERC - POWER EDGE RAID CONTROLLER CARDS, CPU FANSetc).
• CreatedService TicketswithOracle - to troubleshoot, maintain virtual machines running on virtual hosts( OVSinstalled ) / improve performance on servers with Oracle Database Instances running on it.
• Installing and setting upOracle 9i, 10g, 11gon Linux for the development team
• InstalledAPEX LISTENER & WEB-LOGICand maintaining them.
• Implemented virtualization usingOVMin Linux onDELL PEseries.
• Linux kernel, memory upgrades and swaps area and performed Red hat LinuxKickstart installations
• Implemented day-to-day tasks inRedhatLinux that include upgradingRpms,kernel,HBA driver, configuringLVM file system, printing issues, connection / network issues etc.
• Created users, manage user permissions, maintain User & File System quota onRedhatLinux.
• Upgradedall servers fromLinux4.xtoLinux 5.x
• UpgradedOVM Managerfrom2.2.0 to 2.2.2& all virtual server hosts fromOVS 2.1.2 to OVS 2.2.2.
• Experience in Migration ofVirtual Machinesbetween differentVirtual Hosts running on OVS
• InstalledOMSAon all the physical servers for hardware monitoring and setting up all the physical servers on a central server that hostsIT ASSISTANTwhich is used to set up alerts on all the servers.
• Created scripts to generate disk and file space alerts.
• RanDELL DIAGNOSTICSon different servers to test MEMORY and CPU related issues.
• DevelopedKornand Bashshell-scripts to automate routine activitiesand involved running somesystem tapscripts.
• Took System backups using tar regularly and Uncompressed the Database backup using LZOP.
• Manage systems using remote consoles likeDRAC for DELLPEHardware Series
• Updated data in inventory management package for Software and Hardware products.
• Capacity Planning, Infrastructure design and ordering systems.
• Worked with DBAs on installation of RDBMS database, restoration and log generation.
• Deleting old / expired instances andDBAN‘dthe old hardware.
• Perform daily system monitoring, verifying the integrity and availability of all hardware, server resources, systems and key processes, reviewing system and application logs, and verifying completion of scheduled jobs such as backups.
• OpenPre-work / Actual-work / Post-work/ Securityticketsthrough service-now database and follow up on their approvals.
• Pre-work includesSanity checkson the servers for original system configuration,running explorer, Check for any space issues and verifyroot access/ Remote Console Access / last backupwith the storage teambefore proceeding with any Patches / Upgrades ( any issues found with these activities are usually taken to the higher management for re-schedules ).
• Worked withVxVMin mirroring volumes on high-end servers to secure file systemson Solaris.
• Trouble shooting server based problems withroot cause analysis.
• Createscriptsto start/stop services, such as teamquest manager, ftp etc., if necessary.
• Focus onsmoothing the transition of projects from development staff to production staff by performing operations activitieswithin theproject life-cycle.
• Follow Company Process flow and document any unexpected outages.
• Notifyand work with Security Teams forEtrustUpgrades or Security Tools necessary as a part of the upgrade policy.
• Work with clients/ offshore teamsimultaneously and updating them regarding the status of the servers during the actual patching process.
• Create, change,deleteuser accounts, password agingasper request.
• Provide Tier III/other support per request from various constituencies. Investigate and troubleshoot issues.
• Repair and recover from hardware or software failures. Coordinate and communicate with impacted constituencies.
• ApplyOS patchesand upgrades on a regular basis, and upgrade administrative tools and utilities. Configure / add new services as necessary.
• Perform periodic performance reporting to support capacity planning.
• Perform ongoingperformance tuning, hardware upgrades, andresource optimizationas required.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Performed all System Administration tasks like cron jobs, installing packages, and patches.
• 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.
• Troubleshooting system, network and user issues.
• Performing tape backups, archiving and checking data integrity through Shell Scripts and job automation.
• Supported back office systems environments.
• Used Puppet tool for managing system configurations.
• 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.
• 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.
• Scheduling jobs through cron - frequent modification to crontab.
• Writing Shell Scripts for managing day-to-day transactions & for automation of routine tasks.

Confidential

System Administrator

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

Responsibilities:

• Handling L1/L2 tasks and managing prod issue in US off hours.
• Server monitoring thru HP/Tivoli/RTview/Ganglia.
• Escalating the issue to onsite when required.
• Recruiting resources to offshore team and guiding/grooming them to bring them to the speed.
• Building the servers which include OS kick start/File system carving/App & DB installation and configuration/System tunings.
• Troubleshooting, ensuring system security, Backup/restore, Disaster Recovery, Performance Monitoring/Fine-tuning on UNIX (SUN Solaris 10, Red Hat Linux/AIX) Systems.
• Installing/configuring ESXi servers and adding them to the cluster for Fault tolerance (FT) and managing them through Vsphere client.
• Creating VMware cluster and enabling HA/DRS features to enable fully automatic failover.
• Configurtion of VMotion, Virtual switch and VLAN in virtual centers.
• Applying VTMs/Firmware updates on the hardware and VM clients.
• Managing user logins/requests such as deployments/SSH key setups/troubleshooting issues.
• Administrative tasks periodically like cleaning of system log files, var files, removing temp files, checking file system and scheduling job automation.
• Worked on EMC SAN tech refresh on both host based and array based migration.
• Implementing the work around and applying permanent solution and updating the business on the closure of the problems.
• Disk Management, partitioning tools like fdisk, sfdisk etc.
• File system management ext3 file system & utilities (mke2fs, e2fsck, and tune2fs).
• Installed & Configured Red Hat Enterprise Linux 5 Network servers with SAMBA file server, FTP server and SMTP server.
• Installation and configuration of Squid proxy and Samba Server and web server.
• Configured NFS and autofs clients for file sharing on about 40 clients.
• Configured different RAID (Redundant Array of Inexpensive Disk) on Linux.
• Configuring LVM and managing the volumes.
• Diagnosing and monitoring performance issues using ps, top, sar, vmstat, instate
• Patching of the operating system and package updating across various OS.
• Firmware updates for OS/ILO/Frames as and when required.
• Working with various vendors for the Root cause analysis and deploying action plan based on the scenario.