SUMMARY:

• Around 9+ Years of experience in Redhat Linux, SUSE Linux, Unix Administration on Cisco UCS, HP Servers, SUSE Manager for Mission Critical and Enterprise applications.
• Experience in installation and implementation of Red hat Linux and SUSE Linux.
• Expertise in creating and managing Logical Volume Manager in Redhat Linux.
• Expertise in Installation, Configuration of Package and Patch Management through Redhat Satellite Server.
• Experience with Cloud stack such as Amazon Web Services, Verizon Terremark, Openstack, IaaS / PaaS.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, sendmail, ftp, remote access, security management and Security trouble shooting skills.
• Experience in Redhat directory server and Redhat identity management.
• Experience in Disaster Recovery and Planning.
• Experience on backup and recovery software like Net backup 5.0 and 6.0 on Linux environment.
• Experience in Logging framework such as Elastic Search, Logstash, Kibana (ELK).
• Experience with Veritas Volume Manager (VxVM), Veritas File System (VxFS), Veritas Net Backup, Veritas Clustering with SAN, NAS environment.
• Experience working in SAN environment like EMC Symmetrix DMX3, DMX4 and Clariion CX3 series arrays.
• Experience with load balancing.
• Installation, administration, implementation, testing and maintenance of complex and heterogeneous networks consisting of Linux (Red Hat)
• Hardware configuration, installation and management on Cisco UCS, HP servers and Workstations.
• Experience with Samba, autofs, Kerberos, LDAP, SSL certs, Apache HTTPD experience a plus.
• Experience with Shell scripting, bash scripting, Perl, Python languages.
• Experience with automation tools like Puppet.
• Handling and generating tickets via the Remedy ticketing tool.
• Configured ILOs and Console connections for HP and SUN servers.
• Knowledge of Routers, Switches, Hubs, Firewalls, LAN, WAN Intranet, Internet and Load balancers.
• Maintained high availability of data using Oracle Real Application cluster Server.
• Excellent Project Management experience.
• Systems and network Planning and Administration.
• Backup and Restore Management like backup, Tape library and Disk library and EMC.
• Excellent verbal communication skills and strong documentation skills.

TECHNICAL SKILLS:

Operating System: SLES 10, 11, Red Hat Linux (3/4/5/6)

Hardware: Cisco UCS C240 M3 and C240 M4, HP Gen 8 Blade and Rack mount Servers, Sun Fire 280R/V 480/4800/3800/12 K/15K, TSeries, MSeries Server, Sun Enterprise 6500/5000/450/420 R,, HP 9000 K,L,N class server, rp8xxx/7xxx, IBM RS/6000, pSeries, Xseries, HP/IBM/Blade Servers, IBM BladeCenter Platform.

Storage: NetBackup, SAN EMC Symmetrix 800/ DMX1000, 2000 & 3000, EMC Clariion 500, 600, 700, NetApp NAS 2000/ 3000 series

Cluster: Oracle Real Application Cluster, MapR Hadoop Cluster.

WORK EXPERIENCE:

Confidential, Chevy Chase, MD

Linux Systems Engineer

Responsibilities:

• These advisories are based on research from Google Project Zero that identified new methods for side - channel analysis in modern computer processors.
• Because these methods target foundational technology, namely speculative execution, that is part of many manufacturers processors, this research has wide-reaching implications: from hypervisors to operating systems to web browsers, and from your phone to servers running in datacenters that make up the cloud.
• Educated the team that RHEL 7, RHEL 6, SLES 12 kernel/microcode updates were to be available relatively fast than as compared to RHEL 5 and SLES 11; since as these kernel code was 10+ year old code and Redhat/SUSE support were very cautious about ensuring there are no unforeseen regressions the newer code could introduce.
• Educated the team that Kernel updates were half of the solution. BIOS/Firmware updates must be paired with the kernel updates. Red Hat provided microcode updates for a small subset of tested processors.
• Furthermore, informed the team that we would need to contact VMware, Cisco and HP support to provide us with the relevant firmware updates for applied to ESXi hypervisors and physical servers respectively.
• Lead and coordinated the effort to get these Kernel updates and firmware updates applied to servers without causing downtime or outage to customers.
• Successfully validated the updates and the users confirmed to us that they did not observe meaningful performance impact for majority of servers.

Confidential, Phoenix, AZ

Linux Systems Engineer

Responsibilities: -

• Built, Configured, Administered, Maintained and Supported 1800+ servers of Redhat Linux on Cisco UCS hardware for MapR Hadoop.
• Utilizing the StackIQ/Salt configuration management tool for building huge number of servers at once to comply/fulfill with capacity requirement. It involves creating hosts and attributes excel sheet, checking out current hosts/attr file in SharePoint, updating the content, checking in the file on SharePoint server, saving locally in csv formats, loading the csv file into StackIQ FE, comparing existing hosts/attrs files with this new one, taking backup of old host/attrs file and finally loading the new file into the StackIQ FE database, then rebooting the servers from Cisco UCS KVM console of each server the for OS installation, validating the built server and for any issues and resolve them before handing built server to application team.
• Corrected the Security Misconfigurations for the MapR Hadoop Big data Infrastructure which included directory permissions, openssl package upgrades, sshd configuration & apache configuration.
• Hardware maintenance: Blacklisted Hadoop node, after running tasks were zero then put the node in maintenance in MapR Control System for 120 mins, stopped mapr-warden, shutdown the server, after replacing failed hardware part, start warden and wait till volume low data replication alarm goes away.
• Submitted firewall requests to network team for opening up of ports for proper communication.
• Salt & StackIQ configuration management tool: Involved in updating the /etc/issue file with proper contents and editing /etc/sshd/ssh config with Banner /etc/issue and restarting the ssh service from the StackIQ front end server for all the servers in the existing environment.
• Involved with the enabling sftp logging on edge and datatransfer Hadoop nodes.
• Created Request for Change (RFC) & Incident Tickets on Service Now for hardware changes including replacing Failed HDDs, Failed Memory module, failed storage pools, Power pull server, Server builds, faulty LSI raid card replacement, firmware upgrades, link speed change for Cisco UCS production, Test & Dev servers.
• Scheduled downtime for production servers before implementing or executing any changes to production, Test & Dev servers on Nagios monitoring tool.
• Provided on-call production support on 12x7 on rotational basis for resolving Nagios alerts.
• Ensured the effective delivery of servers within the stipulated SLA.
• Provided patching support & upgrading of RHEL OS on monthly basis for applying the security patches for Linux servers.
• Coordinated & communicated patching effort for the Linux OS with application users/owners for the smooth transition from old kernel to new kernel of Linux OS.
• Provided sudo access to application users on day to day basis for their continuous implementation of mission critical tasks.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, sendmail, ftp, remote access, security management and Security trouble shooting skills.
• Conducted and coordinated hardware replacements of hard drives on daily basis with datacenter team and MapR team on Cisco UCS hardware; finding slot numbers of faulty HDDs from faults summary tab in UCS central for the server in all the UCS environments.
• Opened support tickets with Cisco TAC for providing replacement parts for the failed hardware components including hard drives, DIMMs, Raid controllers.
• Experience working on Electronic Password Vault (EPV).
• Successfully configured sftp logs in /var/log as per requirement for users sftp logging information as we were disabling ftp and sftp was enforced upon to be used as per the security team directives and so as to pass security audits.
• Experience with Samba, autofs, Kerberos, LDAP, SSL certs, Apache HTTPD experience a plus.
• Resolving MapR Hadoop Issues: Successfully resolved customer issues individually and/or working with the MapR support.
• Experience with load balancing.
• Experience with Shell scripting, bash scripting, Perl, Python languages; Involved with scripting tomcat auto start, auto unlock of user accounts and patching scripts.
• Opened tickets with IBM support for replacing failed hardware including failed hard drive, failed DIMM; by providing the DSA information from the servers.
• Attended team meetings, change control meetings to update installation progress and for upcoming changes in environment.
• Expertise in Installation, Configuration of Package and Patch Management through Redhat Satellite Server.
• Successfully configured secure logs on all the servers for finding duration of time it takes after user puts in his password to command prompt to appear; since users where complaining frequently about the slowness of the environment.

Environment: Cisco UCS Servers C240 M3 and C240 M4, MapR Hadoop, Redhat Enterprise Linux 6.x, IBM servers, Nagios monitoring, Service Now.

Confidential, Waltham, MA

Linux Systems Engineer

Responsibilities: -

• Built, Configured, Administered, Maintained and Supported 1200+ servers of Redhat Linux on Verizon Terremark.
• Worked on Proof of Concept for deploying Identity Management Services such as Redhat IDM for the Infrastructure.
• Migrated several physical and virtual servers from existing datacenters to Cloud: Verizon Terremark.
• Experience with Cloud stack such as Amazon Web Services, Verizon Terremark and Openstack.
• Installed, Configured and Administered Oracle database, apache on servers.
• Created Oracle database instances for Oracle database administrators.
• Architected, Deployed and administered Redhat IDM into the infrastructure for user management.
• Ordered, configured and administered 200TB storage appliance for copying data required for migrating the datacenter servers to Terremark.
• Facilitated tasks associated with moving of the 200TB storage appliance from datacenter to Terremark.
• Experience with Cloud stack such as Amazon Web Services, Verizon Terremark, Openstack, IaaS / PaaS .
• Experience with Shell scripting, bash scripting, Perl, Python languages.
• Worked on the AWS Vulnerability / Penetration Testing Request Form for security scanning of websites which were running on load balanced instances.
• Worked on various Logical Volume Manager tasks that included adding disks to the volume groups, increasing the size of the logical volumes and creating new file systems on those logical volumes.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent, installation, adding NAS storage on 2,3, 4 node clusters.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, sendmail, ftp, remote access, security management and Security trouble shooting skills.
• Experience with automation tools like Chef/Puppet.
• Expertise in Installation, Configuration of Package and Patch Management through Redhat Satellite Server.
• Experience working in SAN environment like EMC Symmetrix DMX3, DMX4 and Clariion CX3 series arrays.
• Experience with load balancing.
• Build, scale and support Load testing environments.
• Ensuring the effective delivery of servers within the stipulated SLA.
• Network administration and monitoring on Linux using native UNIX commands like netstat, ifconfig, ethtool, traceroute and tcpdump.
• Acquired SAN storage and configured it under Logical volume manager in Linux environments.
• Migrations of servers from physical to virtual.
• Worked with Linux (DM) Multipathing.
• Experience with Azure Configurations.
• Experience with Samba, autofs, Kerberos, LDAP, SSL certs, Apache HTTPD experience a plus.
• Documented various procedures for installation, upgrades, and bug fixes and troubleshooting for all types of Linux environments.
• Confidential is into the health care business.
• Worked on-call L3 Support 24x7 on a weekly basis.
• Attended team meetings, change control meetings to update installation progress and for upcoming changes in environment.

Environment: Verizon Terremark, Amazon Web Services, Vmware Vsphere 4.x 5.x, Redhat 4.x 5.x 6.x, CentOS 4.x 5.x 6.x, Fedora 18 19, Ubuntu 10.x 12.x, Amazon VPC, Cloudfront, CloudWatch, RDS, S3, ELB.

Confidential, Chevy Chase, MD

Linux Systems Engineer

Responsibilities: -

• Provided system support for 1000+ servers of SUSE Linux and Redhat Linux including routine maintenance, patching, and system backups and restores, and software and hardware upgrades.
• Install and configure RHEL 5.x and 6.x on virtual machines as well as physical server.
• Worked on building new SUSE & Redhat Linux servers, support lease replacements and implementing system patches using the HP Server Automation tool.
• Experience with VMware Virtualization using ESX hypervisor of VSphere 4.1.
• Experience in installation and implementation of SLES 10, SLES 11 and Redhat Operating Systems.
• Configuration, implementation and administration of Clustered servers on SUSE Linux environment.
• Experienced in system administration, System planning, co-ordination and group level and user level management.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, sendmail, ftp, remote access, security management and Security trouble shooting skills.
• Expertise in Centrify Authentication services.
• Expertise in creating and managing Logical Volumes in SLES Linux.
• Performed automated installations of Operating systems SUSE Linux using autoyast.
• Experience on backup and recovery software like Net backup on Linux environment.
• Systems and network Planning and Administration.
• Supported production systems 24 x 7 on a rotational basis.
• Understanding of Microsoft System Center: Creating and Implemented Changes on servers and documented the change in the
• Resolved Security Access Requests via Peregrine Service center to provide the requested User access related requests.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent, installation, adding NAS storage on 2,3, 4 node clusters.
• Expertise in Installation, Configuration of Package and Patch Management.
• Handling and generating tickets via the BMC Remedy ticketing tool.
• Experience with HP Gen 8 blade servers and rack mounted servers.
• Coordinated Hardware configuration, installation and management as well as. Configuration of ILOs and Console connections for HP Gen 8 Blade and Rack mounted servers.
• Experience with setting up Linux servers for Oracle Real Application Clusters and configuring SAN based mount points.
• Excellent Project Management experience.
• Expertise in Performance Monitoring and Performance Tuning using Top, prstat, sar, vmstat, ps, iostat etc.
• Experience with load balancing.
• Creating new file system, managing & checking data consistency of the file system.
• Created new file systems using Raw Device Mapped lun’s, Virtual Disks and SAN storage as per required.
• Experience working in SAN environment like EMC Symmetrix DMX3, DMX4 and Clariion CX3 series arrays.
• Experience with Shell scripting, bash scripting, Perl, Python languages.
• Successfully Migrated virtual machines from legacy Virtual environment Vmware Vsphere 4.1 to new Vmware Vsphere 5.1.
• Successfully upgraded SUSE Linux 10 to SUSE Linux 11 on an Oracle production standby server without losing any of the database information.
• Documented the procedure of Obsoleting servers resulting in considerable reduction in time and mistakes for this process as well streamlining the existing process.
• Communicated and Coordinated with customers internal/external for resolving issues for reducing downtime.
• Supported after-hours to meet deadlines as well as for operational support as required.
• Proven experience in end-to-end problem determination/troubleshooting system issues.

Environment: SUSE Linux 10, 11; HP Gen 8 Blades and Rack mount Servers, HP Server Automation, Vmware Vsphere 4.1 and 5.1, Microsoft System Center, IBM Storage, and NetBackup Storage.

Confidential, Jersey City, NJ

LINUX Administrator

Responsibilities: -

• Installation, Configuration and upgrade of Redhat Linux (2,3,4,5), CentOS, Oracle Linux, SUSE, Solaris, AIX, HP-UX & Windows 2000 / 2003/2008 Operating System.
• User Administration, management and archiving.
• Install and configure RHEL 5.x and 6.x on virtual machines as well as physical server.
• Configuring NFS, NIS, NIS+, DNS, Auto Mount & Disk Space Management on SUN Servers.
• Experience in Configuring and Managing Virtual Disks, Disk Mirrors & RAID Levels.
• Data Center Migration support for CX, DMX attached hosts.
• Worked with OVF "Open Virtual Machine Format" supported tools VirtualBox, Redhat Virtualization (XEN), and VMware Workstation.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat, Web Sphere, Weblogic and Jboss servers in Sun Solaris and Linux environment.
• Experience with Puppet and Chef Configuration management tool.
• Experience with VMware Virtualization using ESX hypervisor of Vsphere 4.0.
• Installation, Configuration and Maintenance of Samba, Apache Tomcat, Web Sphere and Jboss servers in AIX, Sun Solaris and Linux environment.
• Experience in Active directory configurations and support.
• Experience with setting up Linux servers for Oracle Real Application Clusters and configuring SAN based mount points.
• Experience with Samba, autofs, Kerberos, LDAP, SSL certs, Apache HTTPD experience a plus.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent, installation, adding NAS storage on 2,3, 4 node clusters.
• Experience working in SAN environment like EMC Symmetrix DMX3, DMX4 and Clariion CX3 series arrays.
• Experience with Shell scripting, bash scripting, Perl, Python languages.
• Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, sendmail, ftp, remote access, security management and Security trouble shooting skills.
• Configuring and maintaining network services such as LDAP, DNS, NIS, NFS, Web, Mail, FTP
• Experience in storage administration support with EMC Symmetrix / DMX, Clariion, NetApp NAS filer and Brocade / Cisco Fiber Switches for zoning purposes.
• Troubleshooting host-based connectivity issues related to EMC software like PowerPath, Navisphere, ECC client software and third-party HBA's (Emulex and Qlogic).
• Emulex and QLogic HBA cards installation and configuration of the host servers.
• Experience with Connectrix Manager and Data Fabric manager, Zoning, LUN allocation, Storage allocation to storage groups.
• Experience with Installation, Configuration and Administration MySQL.
• Expertise in Performance Monitoring and Performance Tuning using Top, prstat, sar, vmstat, ps, iostat etc.
• Expertise in creating and managing Logical Volume Manager in AIX, HP-UX and Redhat Linux.
• Experience with Veritas Volume Manager (VxVM), Veritas File System (VxFS), Veritas Net Backup, Veritas Clustering with SAN, NAS environment.
• Server Consolidation and Migration of Applications on Oracle Enterprise and Java Applications.
• Experience in building Production Servers and validation for new build releases.
• SENDMAIL configurations and administrations, testing the mail servers.
• Creating new file system, managing & checking data consistency of the file system.
• Monitor, Modify and Optimize NetBackup activity, backup schedules and reporting to proactively avoid issues.
• Performed automated installations of Operating systems using Jumpstart, Flash Archive for Solaris and Ignite for HP-UX.
• Installation of Packages and Patches for AIX, Solaris 8/9/10, Redhat Linux 4/5, HP 11.X.

Environment: Redhat (2,3,4,5), CentOS and SUSE Linux, Solaris 8 / 9 / 10, Sun Enterprise Server, HP 9000 K, L, N Class Server, IBM RS/6000, pSeries Server, NetBackup 5.0, SAN EMC Clariion CX 700/ CX 600/ CX 500, EMC DMC 2000/ 3000, NetApp NAS 3000, Windows NT 2003/2000/ XP.

Confidential

UNIX/Linux Systems Administrator

Responsibilities:

• Responsible for day - to-day System Administration for SUN SOLARIS servers.
• Build the E450 and 6000 Servers with Solaris operating system.
• Storage setups, RAID, Logical Volume Manager, system backup design and disaster recovery
• Systems performance monitoring.
• Experience with VMware Virtualization.
• Solaris Operating Systems upgrade, package installations, updates, patches and software fixes.
• Veritas File system and Veritas Volume Manager 2.5 are used to configure the RAID 1 and RAID 5 Storage Systems.
• Creating User accounts, Mail account, groups, printer etc
• Installing operating systems, patches, hardware, vendor software packages, system customization and documentation of all departmental UNIX, PC-based workstations and Terminal.
• Preparing servers for Oracle RAC installation which includes tuning the kernel, agent, installation, adding NAS storage on 2,3, 4 node clusters.
• Maintained high availability of data using Oracle Real Application cluster Server.
• NFS Management - Take care of user accounts/groups, setting up of NFS Environment.
• Solving the problems as & when created when NFS data being accessed.
• Configured auto mounts/maps for the user accounts.
• Administration/Configuration of Print Servers/Clients in the Network
• Worked closely with database administration staff to ensure optimal performance of databases, and maintain development applications and databases.
• Assembling the systems and installing operating system and application software.
• Designing computer displays to accomplish goals using flowcharts and diagrams.

Environment: Solaris 10/9/8/2.x, HP-UX 11.0/11i, AIX 4.3, 5.1/5.3L,Sun E10K and E15K Servers, Sun Enterprise 6500/500/4500/450/ 420 R/250 Servers, Ultra Enterprise 2/1 Servers, SPARC server 1000, SPARC server 20 Enterprise Servers, SPARC server 1000/20