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Senior Linux System Admin Resume

Franklin, TN

SUMMARY

  • Experience of 8+ Years in System Administration, Kernel Tuning, System planning, co - ordination and group level and user level management.
  • Network Operations Center (NOC), Databases and Data Center Migration.
  • Setting up Network Environment using UFS, ZFS, NFS, NIS, DNS and DHCP.
  • Expertise in creating and managing Logical Volume Manager in Red Hat Linux.
  • Red Hat Enterprise Linux (RHEL) VMWare, and Unix/Linux Engineer, Ubuntu.
  • Expertise in Installation, Configuration of Package and Patch Management through Redhat Satellite Server.
  • Deployment, patching and troubleshooting of middleware application environments and systems.
  • Experience in Installed, configured JBoss 4.x/5.x/6.x software binary in all environments.
  • Remarkable experience wif JBoss EAP administration and good understanding of J2EE architectures, J2EE technologies and SOA.
  • Familiarity wif RHEL 5, JBoss EAP, JBoss AS 7.0, Apache 2.4, Tomcat 6.0, JON and proficient wif JBoss EAP 5.0 to 6.0.
  • Disaster Recovery and Planning.
  • Tuning Kernel parameters based on application requirement.
  • Experience in configuration of NIS, NIS+, DNS, DHCP, NFS, LDAP, SAMBA, SQUID, postfix, send mail, ftp, remote access, security management and Security trouble shooting skills.
  • Software Development Life Cycle (SDLC) including Analysis, Design, Implementation, Testing and Maintenance of Web and Enterprise based applications using Core Java/ J2EE technologies, JVM and Linux/ Unix Redhat 5,6,7.
  • Redhat directory server and Redhat identity management.
  • Back-up and recovery software like Net backup 5.0 and 6.0 on Linux environment.
  • Experience wif Veritas Volume Manager (VxVM), Veritas File System (VxFS), Veritas Net Backup, Veritas Clustering wif SAN, NAS environment.
  • Installation, administration, implementation, testing and maintenance of complex and heterogeneous networks consisting of Linux (Red Hat)
  • Experience wif Shell, Python and Bash scripting languages.
  • Configured ILOs and Console connections for HP and SUN servers.
  • Knowledge of Routers, Switches, Hubs, Firewalls, LAN, WAN Intranet, Internet and Load balancers.

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6/7, SUSE 9/10/11, Solaris 8/9/10, Windows 2003/2008, CentOS, Ubuntu, AIX

Virtualization/Automation: ESXi 3.5, 4.0, 4.1, 5.0. Solar Winds Suite, Office 365, Active Directory, VCOPS, Jenkins, Ansible, Chef

Storage: VERITAS Volume manager 3.5 and 4.x, Logical Volume Manager, Tivoli (TSM), VERITAS NetBackup4.5, EMC Power Path, EMC Symmetrix, Hitachi, IBM arrays, Storage-TEK L700, Dell Power Vault.

Cluster: Veritas Cluster Server (VCS), Vmotion, Hadoop

Web Servers: Apache1.3.x, 1.2, 2.x, JBoss4.0.x, Web Logic, Web Sphere, ATG, Java Web Server, Virtual Hosting, Spelunk 5.0s, Nix, LAMP stack, Tomcat, IIS 5.0/ 4.0, SAMBA v3.0, Drupe, Send mail.

Database Servers: Oracle8i/9i, 10g, 11g, RAC, MS SQL

Network Services: SMTP, SNMP, SSL, DHCP, POP, HTTP, SMB, NIS, NIS+, NFS, SFTP, DNS, FTP/TFTP, LDAP, JDBC, ARP/RARP, SSH, TCP/IP, WEBSM, NAT, NTP, TELNET.

Hardware: HP BL 460, 620’s, 680, C7000. Sun T2’s/T3 Dell Power Edge Servers,730 Dell 2300, 2400, 2450,2850,2950,6300.

Scripting: Bash, KSH, CSH, Power CLI, Perl Scripting, Python, Ruby, PHP, Shell

PROFESSIONAL EXPERIENCE

Confidential, Franklin, TN

Senior Linux System Admin

Responsibilities:

  • Built RHEL 5, 6, 7 servers on ESX 5.x VMware platform through kickstart.
  • Performed Shell and Bash scripting for job automation.
  • User management and server security hardening.
  • RHEL Satellite patching, Yum update and ILOM firmware upgrade for Solaris, Ubuntu.
  • Handled internal and external bridges during maintenance window wif ITSOC and application team.
  • Updating Configuration and troubleshooting of RHEL servers.
  • Co-ordinated wif development teams whenever their was an upgrade/ maintenance window.
  • Was directly involved in resolving booting issues of Linux System (Repair MBR, GRUB).
  • Took care of Migration / Upgradation of client’s server wif minimum downtime. Adding, expanding, multipath disk, teh disks from teh system.
  • Extended teh resources for VM like CPU, Memory, and Disk as per request through change management process. Analyzed Log files such as WebLogic/JBoss server logs, node manager logs, Plug-in logs and thread dumps for troubleshooting and Problem determination to resolve issues.
  • Involved in assisting QA team in Load and Integration testing of J2EE applications on WebLogic/JBoss Application Servers.
  • Developed UNIX shell scripts on Linux and WLST scripts to start/stop admin and manage servers and to deploy different applications like .war or .ear files.
  • Managing and installing patches, upgrades and enhancement on Middleware products.
  • Infrastructural support comprising of RHEL 6.4, 6, 7
  • Linux Admin and work on network implementation as in TCP/IP DHCP, SIP, NTP, IPV6 and RTCP and TIBCO based implementation
  • Worked on VMware ESX4 server, VMware Workstation and upgraded Linux Kernel wif teh latest releases on RHEL servers.
  • Performance tuning and monitoring on Linux, Solaris andHP-UX.
  • Building severs from scratch, installing OS based on App teams requirement, assigning IP, then to DNS servers.
  • Utilized Shell, Python scripting to automate teh regular tasks like removing core files, taking backups of important files, file transfers among servers.
  • Managed administration of teh Domain Name Server and configuration of teh Database Files.
  • Hands of experience in Veritas clustering, Cluster Administration, managing LPARs, and configuring GPFS.
  • Veritas File System (3.x/4.x/5.0), VERITAS Cluster (3.x/4.x), VERITAS Volume Manager and Logical Volume Manager
  • Done various types of clustering like ACIVE-ACTIVE, ACTIVE-PASSIVE etc.
  • Build teh servers from scratch, which include installing RAID, ESXI and assign IPs, assign Network to Physical machines.
  • Assign teh IPs to teh DNS servers.
  • Used various editors like VI, VIM, Pico and Nano.
  • Monitoring and administrating of Red Hat Linux on Enterprise class servers and tuning teh servers for better efficiency.
  • Performed patching of RHEL using Yum, up2date and Blade Logic to latest OS/Kernel version.
  • Hands of experience on various networking Protocols. Done file transfers via FTP.
  • Doing a UAT refresh in order to sync teh Prod topology in UATs so dat app teams can do a rigorous testing wif Prod similar data.
  • Monitor various hosts CPU, Memory utilizations, and find teh culprits for teh issue.
  • Experience in managing and reviewing Hadoop log files.
  • Configured and administered in Various Veritas volume Manger/Veritas file systems
  • Hands of experience on Perl, Shell. Wrote script to check teh health of brokers.
  • Worked on JIRA, Nagios Monitoring, Datadog, Circonus, Zenoss.

Confidential, Westborough, MA

Linux / System Admin

Responsibilities:

  • Managed and administrated all Linux OS and UNIX servers by applying relative patches and packages at regular maintenance periods using Red Hat Satellite server, YUM, RPM tools.
  • Planned and performed teh Linux OS upgrades and hardware maintenance like changing memory modules, disk devices, SAS, SATA & SCSI devices.
  • Installed and configured Red Hat 5.x/6.x on Dell Power Edge server, VMware ESX server on Dell Servers and configured Red Hat Linux 5.0, 6.0 / Windows virtual machines for various applications.
  • Worked on build and deployment of Java application to various client environments.
  • Handled issued related to NFS, Auto Mount, DNS, LDAP.
  • Identified, troubleshoot, and resolved problems wif teh build process
  • Installed, configured, and customized services in Send mail, Apache, FTP servers, as requested.
  • Performed kernel & database configuration optimization to limit I/O resource utilization on disks.
  • Monitored CPU, memory, physical disk, Hardware and Software RAID, multipath, file systems.
  • Checked log files and used cluster commands to troubleshoot cluster related problems.
  • Performed Kickstart installations in Linux.
  • Working on Active Directory for role group and host group configuration setup.
  • Administration and maintenance of RedHat Linux 6.1.
  • Worked on User administration setup, maintaining account, Monitor system performance.
  • Writing Shell and bash Scripting for automation of job.
  • Experience in system Software installation and configuration of NFS shares, Auto-Mounter, DHCP and LDAP.
  • Created and modified Veritas Cluster Service Groups and managed switchover from node to node and just as importantly, from interstate primary and DR sites
  • Manage logical Volume manager on Red hat Servers.
  • Scheduled cluster on Grid and installed applications wif it.
  • Troubleshooting day-to-day server related issues and problems in terms of operating system, applications and network.
  • Creation of VMs, cloning and migrations of teh VMs on VMware vSphere 5.0.
  • Worked efficiently on managing teh RAID, File system through LVM and creating and managing
  • Logical Volume Manager in Red hat Linux.
  • Integrate and implement server solutions and server components such as proxy servers, web servers,
  • Application servers, database servers, directory servers, core infrastructure services (Proxy, DNS,
  • SSH, SMTP, etc.)
  • Involved in troubleshooting Production Server Problems related to web applications, Send mail, diskspace, Filesystem, DNS and network connectivity.

Confidential, Chantilly, VA

Linux Engineer

Responsibilities:

  • Monitored server and application performance & tuning via various stat commands (vmstat, NFS-stat, iostat) and tuned I/O, memory, etc.
  • Managed systems routine backup, scheduling jobs like disabling and enabling Cronjobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
  • Worked in Java and programming in JavaScript, J2EE, JSR, JSF, AJAX, jQuery, JSON, RIDC.
  • Used MVC design pattern wif JSP, HTML for front-end and Servlets and EJBs for Model layer.
  • Mainly worked in presenting data using eBilling reporting Module by configuring teh report in teh report XML.
  • Used Java Message Service (JMS) for sending confirmations to teh passengers about ticket purchases.
  • Configured Database Support for WebLogic Application Server.
  • Oracle Enterprise manager Cloud Control for monitoring.
  • Used Ant Build scripts for compiling and deploying teh application onto Apache Tomcat Web Container.
  • Worked on Configuring JDBC Connection Pools, Data Sources, Executed Threads etc.
  • Used various security roles for maintaining security realms in staging and production environments.
  • Performed File system and Application backups.
  • Performed automated installations of Operating System using kickstart for Red Hat Enterprise Linux 5.
  • Configured Network Concepts NFS, DNS, NIS and DHCP, troubleshooting network problems such as
  • TCP/IP, providing support for users in solving their problem.
  • Performed administrative tasks such as system start-up/shutdown, backups, Printing, Documentation, User Management, Security, Network management. Involved in day-to-day Operations, installed new OS or software, applied patches, managed file systems, monitored performance, and troubleshoot alerts, Solved Server Problems in Linux
  • Handled Logical Volume Manager (LVM) related tasks, Creating, resizing LVM, Veritas Volume manager and managing Cluster environment using Veritas Cluster suite
  • Worked on remote system administration via tools like SSH and Telnet
  • Performed troubleshooting on DNS, DHCP, LDAP and network problems
  • Monitored System Activities like CPU, Memory and Disk space usage to avoid any performance issues
  • Involved in writing and modifying scripts using Bash for day-to-day administration and automation of tasks
  • Adding servers to domain and managing teh groups and users in LDAP, installing, and configuring sendmail

Confidential, Los Angeles, CA

Linux/Unix Admin

Responsibilities:

  • Assisting in planning and implementation of virtual environment.
  • Creating a procedure for teh P2V migration.
  • Analyzing teh servers to be virtualized or migrated.
  • Managed a decent cloud storage environment wifVrealizecloud environment, performed backups and Audit reports based on user log information fromVrealize.
  • UsedVMwarevCenter, created DataCenter Environment by creatingVMwareclusters, adding ESX hosts in teh clusters, and implemented HA and DRS.
  • Performed physical to virtual (P2V) migrations for approximately 500 physical servers utilizing VMwareConverter.
  • Daily provisioning and optimization of storage environment wif NetApp FAS3050, FAS3160, FAS270.
  • Administrating multiple labs in VMwareLab Manager.
  • Worked on deploying Linux SuSE 10, 11 and 12 versions.
  • Upgraded from Linux SuSE version 10 to 11 and from 11 to 12.
  • Deployed RDSH in windows 2008 and windows 2012 server versions.
  • Worked over RDSH in updating operating systems from windows .
  • Installed and upgraded Horizon Client suite environment toVMwarehorizon 6 version.
  • Involved in installing/configuring and troubleshootingVMwareLab Manager and administrating multiple labs in Lab Manager and dealing wif Lab Manager Issues.
  • Troubleshooting &testing of VDI instances.
  • Involved in built and deploy teh windows XP and windows 7 golden image for teh VDI environment.
  • Used HP C7000 blade enclosures wif installing multiple layers of HP blade servers.
  • Upgraded from HP C7000 server to HP C7000 platinum server, which improve transmission speeds at exponentially high level.
  • SCCM Configuring and installing enterprise edition and SCCM backup, maintaining redundancy.
  • Upgrading system severs on SCCM from, SCCM R2 to SCCM R2 SP1 at client level server.
  • Managed EPIC infrastructure, regarding Health care management.
  • Designed work flow and data base architecture using EPIC.
  • Reduced CPU load on NetApp filers from 90% to 55% by optimizing volume configuration.
  • Planned and performed a head swap from a NetApp FAS3050 to a NetApp FAS3160.
  • Installing, configuring and troubleshootingVMwareView.
  • Performed tons of V2V Migration.
  • Performed operation on Team city on tool building at teh application level.
  • Worked on SCSI internet protocol commands and perform data transfer via serial communication, worked on SCSI versions such SCSI-FCP and SCSI-UAS.
  • Discussing wif teh user and team and scheduling migration and monitoring migration.
  • Creating a workflow for Pre/Post Migration.
  • Perform operational turnover on all system implementations.
  • Migrating machines either P2V or from Microsoft Hyper V environment toVMwareenvironment
  • Worked wif Servers like Windows 2000, 2003, 2003R2, 2008, 2008R2.
  • Troubleshoot outlook problems and managed users archives in network.

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