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Linux / Devops Engineer Resume

Dallas, TX

PROFESSIONAL SUMMARY:

  • Over 8 years of experience in IT industry in the areas of System Administration, System Support, Capacity Planning and Troubleshooting UNIX servers, Managing and Administering Sun Solaris 8,9,10,11, SUSE Linux, RHEL 4/5/6, Windows and AIX, SUSE Linux.
  • Hands on administrative experience on installation of Packages and Patches in Linux using Redhat Satellite server.
  • Installed, configured and implemented automating the provision of OS by using KickStart for Redhat and Jumpstart for Solaris.
  • Extensive experience on configuration and OS installation through network and standalone installation technique, and also installing third party software and services.
  • Experienced in configuring Volume Management by using Logical Volume Manager (LVM) in Linux, Veritas Volume Manager (VxVM), and Solaris Volume Manager (SVM) in Solaris.
  • Proven ability in implementing High Availability environment using Veritas Cluster Server 4.1 with agents of Sendmail, WebLogic and NFS.
  • Working experience with cloud infrastructure of AWS (Amazon Web Services) and computing AMI virtual machines on Elastic Compute Cloud (EC2).
  • Regularly updated all software and operating systems on the instances running in EC2, to eliminate security loopholes.
  • Experience in Installation and configuration of VMware ESX server 3.5 on Dell and HP Proliant servers and configured VMs for Solaris x86 and Linux.
  • Working knowledge of various SMTP Servers - Sendmail 8.12.11, 8.14.2, Postfix 2.x, and Exchange 2000/2003
  • Expert in UNIX shell scripting - ksh, bash, sh and knowledge of PERL scripting.
  • Experience with patch and package administration including building of packages and RPMs.
  • Experience in diagnosing and resolving TCP/IP connection problems
  • Experience in performance tuning, trouble shooting and resolving network issues, related to the servers.
  • Experience with Solaris virtual technologies Zones and LDoms.
  • Experience in administering Webserver Apache and Application server JBoss.
  • Experience with switches and routers from various vendors like Cisco, Dell, and HP.
  • Experience in making Disaster Recovery and Disaster Contingency Plans; DR with SunGard, SRDF devices.
  • Excellent written and verbal communication skills.
  • Experienced in managing and creating all kind of file systems like VxFS, ZFS, Ext3, Ext4, UFS.
  • Expert on Raid-0, Raid-1, Raid-5 and created Logical Volumes, Logical Volume Groups and manipulated them as required
  • Experienced in configuration, installation, and support of JBOSS, Tomcat, Apache Web server, WebSphere, LDAP and mail server.
  • Hands on experience in user Administration, Hardware setup, and managing paging/swap space.
  • Highly experienced in Process automation and Monitoring using Shell Scripts.
  • Accomplished backup procedures using Veritas NetBackup and performing Disaster recovery and patching.
  • Competent in DHCP Server, NIS, NIS+, LDAP, NFS, TCP/IP and Samba.
  • Strong understanding with VMware. Installed and monitored Virtual environments with ESX/ESXi servers and VirtualCenter2.X.
  • Skilled in Storage Area Network (SAN) that consisted of McDataSphereon, HDS 9980v.
  • Dealt with administrative tools like ILOM and KVM to manage change request in data center, and emergency situations.
  • Managed and dealt with system performance and monitoring tools like Nagios, Cacti, and GNOME.
  • Provided support and troubleshoot problems related to bootloaders like GRUB and LILO and performed PXE boot.
  • Managed, configured and installed puppet on various servers.
  • Experienced in writing concise and clear documentation.
  • Effective conflict resolution and problem solving capability.
  • High level of problem solving and conflict resolution capabilities.
  • Ability to lead technical discussions and projects in an organized manner
  • Ability to document strategies and designs and present these ideas to management with cost/benefit analysis.
  • Strong interpersonal skills, including both written and verbal communications.

TECHNICAL SKILLS:

Hardware: Intel Based Servers/PCs, Dell/ HP servers and PCS. Sun Ultra 5/10/60, Sun Enterprise (E250/450, 5000, 6500), Sun A1000/D1000/3310FC Array, Netra T1, Sun Fire (280R, 420R, V210, V240, V250, V440, V480, V490, V880, V890), Linux Server, DellPowerEdge 6300/500, Backup devices, Ethernet Hubs, Routers, LAN Testers, Cable Modems, Terminal Servers and Print Servers

Operating Systems: Linux (Red Hat 4.x, 5.x, 6.x, SUSE 9,10,11, Unix-Sun Solaris 8,9,10,11 VMware ESX 3.5,4.0, Ubuntu 10.04/12.04, AIX 5.x, 6.x, 7.x

Programming Languages: C, C++, Unix Shell scripting ( - ksh, Bash and csh), Python, Perl and Ruby scripting, HTML, PL/SQL

Networking Environment: NFS, AutoFS, NIS, DNS, DHCP, Cisco Routers/Switches, WAN, SMTP, LAN, FTP/TFTP

Disk Management: Logical Volume Manager, Veritas Volume Manager 4x, 5.x, 6.x, Solaris Volume Manager

File Systems: ZFS, UFS, VxFS, Ext, Ext2, ext3, ext4

Monitoring Tools: Nagios, Tivoli, snmp, EM7, splunk, Xymon, Zabbix

Web/Application Servers: Amazon Web servers (AWS), JBoss4.x, 5.x, Web Logic 8.x, 9.0, 10, WebSphere 5.x, 6.x, A pache Server 1.3.x, 2.2.x, Apache Tomcat 5.x, 6.x, 7.x

PROFESSIONAL EXPERIENCE:

Confidential, Dallas, TX

Linux / Devops Engineer

Responsibilities:

  • Installed and configured operating system RedHat Enterprise Linux (RHEL5/6) and Solaris 10/11.
  • Configured and managed groups andUser accounts, setting up User environments in Linux.
  • Performed Root password recovery in the Linux servers.
  • Arranged KickStart for RHEL 5/6 to perform image installation through network.
  • Built system process and supervised the server performance using vmstat, ps, top, netstat,iostat, prstat, free, prtconf.
  • Worked on Configuring Active directory and integrating with Linux Environment
  • Worked on installing and configuring tools like QAS/VAS and integrating with Redhat servers .
  • Managed file servers, directory services, Web servers, and set up user accounts.
  • Administered, Installed, and Configured TCP/IP, NFS, DNS, NIS, NIS+ and DHCP.
  • Worked on Ansible to automate AWS instance creation and also Deploying application.
  • Investigated and resolved diagnostic problems on Linux.
  • Monitored file system usage, investigate and repaired file systems.
  • Secured, monitored, and patched the server using Red hat Satellite Server.
  • Configured/ Installed Solaris 10/11 using jumpstart/ AI, with TPM (Tivoli Provisioning Manager), and configuration management with puppet.
  • Creating, cloning Linux Virtual Machines, templates using VMware vsphere client 5 and migrating servers between ESXi hosts.
  • Installing RedHat Linux using kickstart and applying security polices for hardening the server based on the company policies.
  • Performed package administration on Linux using rpm and yum thru RHN Satellite and subscription manager.
  • Worked on Azure on Microsoft.
  • Build and configure a virtual data center in the Amazon Web Services cloud to support Enterprise Data Warehouse hosting including Virtual Private Cloud (VPC), Public and Private Subnets, Security Groups, Route Tables, Elastic Load Balancer, CloudWatch, CloudTrail, and Security Management VPC.
  • Build application and database servers using AWS EC2 and create AMIs as well as use RDS for Oracle DB.
  • Worked on Docker and created virtual instances with Docker.
  • Worked on Creating API’s on nodejS and AngularJS
  • Worked on AWS opswork, AWS Lambda, AWS code deploy, AWS cloudformation and cloud foundry.
  • Configured, managed, installed, and troubleshoot Solaris Virtual Servers/ Technologies with zones and LDOMs.
  • Managed disk space using various types of file systems, and volume management solutions: VxVM, ZFS, LVM and SVM.
  • Maintained User accounts and groups, setting up User environments in Linux.
  • Removed, Installed, Upgraded, and queried software packages using RPM and YUM.
  • Performed Root password recovery in the Linux servers.
  • Administered KickStart for RHEL 5/6 to perform image installation through network.
  • Managed data stores and vcenters with VMware Installation and ESX hosts configuration.
  • Managed, configured, and Installed Sudo for users to access the root privileges; also familiar with powerbroker environment, for role-based privileges.
  • Install, configure and administer log analyzer tool CloudWatch.
  • Worked with ANT, maven and JIRA.
  • Worked on migrating Vmware to AWS using snowball and VM import/export.
  • Experience with AWS bean stalk
  • Experience working on AWS code deploy, lambda, VPC and CLI.
  • Worked on Nagios instalation and confgiuration.
  • Worked on Splunk install and confguration.
  • Worked on NRPE’s with nagios
  • 24/7 oncall rotation ..

Environment: Solaris 8/9/10/11; Red Hat Enterprise Linux 5x/6x; IBM AIX 5.1/5.2; p series 550, 570, RS/6000 R50, E4500;Veritas Volume Manager; Veritas Cluster Server; VMware ESX 4.x, 5.x;SUN Enterprise 420R, 450, V490, 3500, 4500, 6500, 8800; Nagios; Tomcat6; Oracle 9i;DNS; DHCP; NIS; NFS; Puppet; Apache 2.x.

Confidential, Baton Rouge, LA

Unix/Linux Engineer

Responsibilities:

  • Performed system administration activities using used NFS, NIS, DHCP, FTP, Send mail, and Telnet for Linux.
  • Designed, Built, Configured and Troubleshot RedHat Linux 5/6 and Solaris systems.
  • Managed various file system and added Disk Space on the Linux and UNIX servers.
  • Troubleshot and monitored various performance related issues using performance monitoring utilities like VMSTAT, NETSTAT, TOP, IOSTAT and SAR.
  • Updated and installed packages and patches for all the servers.
  • Installed and configured apache web servers on various Linux and UNIX servers.
  • Monitored system logs and important messages for warnings and errors of the software and hardware failure.
  • Responsible for system administration activities like updating the maintenance page, installing, stopping and restarting the services during the maintenance period; generated daily report physically.
  • Worked with UNIX and Linux servers using internal tools such as who, du, df, top, dmesg, free.
  • Responsible for setting up and managing hardware upgrades, performance tuning, and resource optimization as required.
  • Maintained/ configured LDOMs, Zones, ZFS pools on Sun Solaris 10 Servers, installed and configured Solaris servers using Jumpstart.
  • Administered packages using RPM/ YUM on Red Hat Linux and maintaining patching on Solaris servers.
  • Involved in various SAN Fabrics (FC SAN, iSCSI SAN) and NAS storage for effective and efficient storage.
  • Responsible for setting up and managing Multipath, Powerpath, added SAN, created physical volumes, volume groups, and logical volumes.
  • Configured KickStart and Jumpstart environments.
  • Made backups of the critical files using gzip, tar, zip, gzip and compress utilities.
  • Migrated servers between ESX hosts and Created, cloned Linux Virtual Machines, templates using VMware Virtual Client 3.5.
  • Configured and monitored periodic Disaster Recovery (DR) test activities.
  • Managed NFSconfiguration to set up servers.
  • Developed Chef recipes to configure, deploy and maintain software components of the existing infrastructure
  • Setting up & trouble shooting the nightly/on-demand builds for all Patches/Hot-fixes and for all releases
  • Setting up Jenkins Continuous Integration builds for all releases on windows and Linux.
  • Involved in meetings with Dev managers to Create, manage and maintain the SCM Plan, standards, and procedures
  • Integrated Maven with Subversion to manage and deploy project related tags.
  • Setup Maven Remote Internal Secure Repository with access restricted to team members
  • Installed and administered Nexus repository to deploy the artifacts generated by Maven and to store the dependent jars which are used during the build.
  • Installed and configured Jenkins tools on Linux and windows platforms, Manage slaves and installing Jenkins plugins.
  • Streamlined Build process for Fortify scan of code from Manual to Automated mode by setting up Jenkins Automation environment, thus reducing manual error prone, Build time, No logging to machine is required.
  • Following agile methodology using RTC as a supporting Tool.
  • Administering Hudson/Jenkins CI servers, HP Quality Centre, HP Fortify, Build servers, Code collaborator.
  • Had setup one of the build components as a Developer’s Self-service.
  • Developed Shell script to list recent ‘n’ number of builds for all the components.
  • Installed and configured Sonar server and client configured Jenkins jobs to run Sonar Analysis jobs.
  • Worked on Red hat Linux 3, 4, 5 and 6 / Scientific Linux 5 and 6 and Centos 5, 6, Sun Solaris 8, 9, 10.
  • Involved in the development environment includes Windows Server 2012 R2, Power Shell 4.0, as well as web interfaces for Atlassian Stash, Crowd and Confluence. Public services included GitHub, CentOS, Ubuntu, and Chef.
  • ConfiguredBamboo Build jobs for pre deployment process (DB execution, Environment configuration changes etc.) on both QA and preproduction Environments
  • Performing Build & Release activities for Major releases
  • Worked closely with the development and operations organizations to implement the necessary tools and process to support the automation of builds, deployments, testing and infrastructure (infrastructure as code) using Chef.
  • Worked on AIX to Linux migration .
  • Worked on NPIV setup on AIX
  • Worked on Redhat Linux installation on VMware..
  • Developed Chef recipes to configure, deploy and maintain software components of the existing infrastructure
  • Setting up & trouble shooting the nightly/on-demand builds for all Patches/Hot-fixes and for all releases
  • Setting up Jenkins Continuous Integration builds for all releases on windows and Linux.
  • Involved in meetings with Dev managers to Create, manage and maintain the SCM Plan, standards, and procedures
  • Integrated Maven with Subversion to manage and deploy project related tags.
  • Setup Maven Remote Internal Secure Repository with access restricted to team members
  • Installed and administered Nexus repository to deploy the artifacts generated by Maven and to store the dependent jars which are used during the build.

Environment: Solaris 8/9/10; Red Hat Enterprise Linux 4/5/6; SuSe Linux Enterprise Server (SLES) 9/10; IBM AIX 5.1/5.2; p series 550, 570; VMWARE; DELL PowerEdge 1650,2850,2950,6400; Sun SPARC workstations (A21, A22, A70, A89) and Servers E450, E3000, E3500; HP-Proliant DL 360G5; NFS; NIS; DNS; Shell/PERL scripts; SAN; Tivoli; Puppet; Nagios; SVM; LVM; ZFS; zones; VxVM; Apache 2.x; WebLogic; Oracle 9i.

Confidential, Reston, VA

Unix/Linux Administrator

Responsibilities:

  • Installed, maintained and administered Red Hat Enterprise 5.x, 6.x, Solaris 8/9/10 servers.
  • Configured Jumpstart and Kickstart Servers for Solaris 9/10 and RHEL 4.x/5.x respectively.
  • Added patch and package on Red-hat Linux servers using RPM’s &YUM.
  • Installed and configured VERITAS volume manager, VERITAS file system and VERITAS cluster server; Maintaining and troubleshooting VCS for failover and redundancy.
  • Added and managed disk along with file system through VERITAS volume manager, Solaris Volume manager and Logical volume manager.
  • Created and Configured GFS (Linux) and ZFS (Solaris) file systems.
  • Worked on Oracle/UDB users and assigned appropriate permission.
  • Created local and global zones using Solaris container technology.
  • Installed and configured Websphere and Apache servers.
  • Involved in disaster recovery testing every quarter; Implemented Disaster Recovery sites from the scratch.
  • Deployed NIS and NFS for administrative and project requirements.
  • Worked on Nagios and VERITAS Netbackup for monitoring system resources, logs, disk usage, scheduling backups.
  • Handled and upgraded Storage, coordinating with vendors on EMC Clarion.
  • Registered the new server hardware under Red Hat network for support and downloading software.
  • Configured IP Multipathing on existing servers to avoid the downtime in case of Network Migration.
  • Worked closely with database administration staff to ensure optimal performance of databases, and maintained development applications and databases.
  • Involved in teams handling system performance, capacity planning and SLA compliance

Environment: Solaris 10/9/8, Red Hat Enterprise Linux 3/4/5, HP-UX 11.0/11i, AIX 5.1/5.3L, Sun Fire 4800/3800/V880/ Sun Enterprise 6500/500/4500/450/420 R/250 servers, VERITAS Clusters, HP 9000 K, L, N class server, IBM RS/6000, VERITAS volume manager 4.5, 5, VERITAS cluster server 5, VERITAS Netbackup, Nagios, EMC Clariion/Symmetric .

Confidential, Monroe, LA

Unix/Linux Administrator

Responsibilities:

  • Maintained and Administered SunSolaris 8/9/10, Red-Hat Enterprise Linux 4.x/5.x/6.x, CentOS 5,6 server & troubleshooting hardware, operating system, applications & network problems and performance issues.
  • Carried out Jumpstart and Post Jumpstart Installation with Solaris 10, and kickstart installation on RHEL environment.
  • Configured Virtual Machines under VMware ESXi servers to install Red Hat Linux guests.
  • Migrated Solaris8/9 to Solaris 10 or RHEL environment; also p2v migration projects.
  • Tested Solaris 11 in test/lab environment.
  • Created and executed Shell and Perl Scripts for automation of administration tasks and used Crontab for scheduling repetitive tasks.
  • Created new Volumes, Disk Groups along with addition and removal of disks and resizing of existing volumes by implementing Volume Management with VxVM.
  • Upgraded VCS from version 4.x to 5.1 MP3.
  • Created ZFS file system hierarchy in Solaris implementing ZPOOL.
  • Organized storage in Solaris with Solaris Volume Manager (SVM) and Red Hat with Logical Volume Manager (LVM) in SAN environment and performed File system tuning and resizing.
  • Configured RAID mirroring of Root Disk using Solaris Manager (SVM) on Solaris.
  • Configured Bonding in Linux, IPMP in Solaris and Ether-channel in AIX to provide network interface redundancy.
  • Configured and administered virtual machines using vSphere 4.0, VMware Converter and vCenter Server 4.0.
  • Created virtualized environment using zones in Solaris for efficient management of system resources.
  • Installed and implemented Mail Server using postfix and dovecot.
  • Implemented, configured, and monitored Veritas Cluster Server4.1 for high availability for agents like DNS, NFS and other database applications along with troubleshooting for Cluster Cable Heartbeat and Network Cables.
  • Used Puppet for centralized management of Linux servers/boxes.
  • Implemented Nagios to monitor and set up thresholds on the various system parameters (CPU, Memory, Disk, and Network) and took corrective measures as the usage approaches the thresholds.
  • Configured and managed DNS, DHCP and NIS, NFS, and LDAP, ftp, sshd Servers.
  • Engaged in SAN migration efforts.
  • Installed and configured Apache2.x webserver in RHEL.
  • Co-ordinated with vendors in handling hardware problems and failures.
  • Tuned the kernel parameters based on system requirements.
  • Carried out data backup and disaster recovery operations.
  • Performed documentation processes and troubleshooting steps.

Environment: Solaris 8, 9, 10, Red Hat EL 3, 4.x, VERITAS Volume Manager 5, VERITAS Cluster Server 5.0, VERITAS Netbackup 6.5, VM Ware ESX 3.5, Virtual Center 2.5, BMC Patrol for Unix, Puppet, Apache 2.2.x, Sun Java System Web Server 7, 7, WebLogic 10, KSH, bash, Oracle 10g, Sun SPARC Enterprise T2000, T5120, Sun Fire v890, 6800, x4100, x4150, E6900, M5000, M 8000, 3510, 3511, Hitachi Lightening 9970v

Confidential, Fremont, CA

UNIX/ Linux Administrator

Responsibilities:

  • Configured and administered RHEL 4/5, Solaris 9 operating systems environment.
  • Used Jumpstart for Solaris and Kickstart for RedHat for automatic provision of OS.
  • Worked on Disk Partition, mirroring root disk drive, configuring device groups in UNIX and LINUX environment.
  • Added and managed patch using tools like Yum, Repository and RHEL satellite server and Sun Update manager for Solaris server.
  • Configured Multipathing on RedHat and Solaris using EMC power path and native Multipathing softwares.
  • Managed patching work on Firmware updates for blade enclosures.
  • Managed SAN storage and created different RAID level configuration for application and database server.
  • Installed and configured JBOSS, Apache, Tomcat, and WebSphere.
  • Worked on LDOMs server virtualization with Solaris zones and ZFS file system.
  • Worked on tuning, backup and recovery system.
  • Maintained and configured DHCP, DNS, NFS and automounter.
  • Managed volume and file system using Veritas Volume management, Solaris Volume Management on Solaris and Linux Volume Management in Linux.
  • Worked on Sun Update Manager tools for patching.
  • Established remote and secured connection through SSH gate.
  • Created and implemented clustering topology in WebSphere application server ND V 5.x, 6.x, 7.x, 8.x to achieve Work Load Management, High availability, Load balancing and hardware failover.
  • Worked on Nagios 3.0 to monitor services like CPU, Hard Drive, Memory, Users, http, ssh etc.
  • Experienced on file system management, User account management, data backups and user’s login support.
  • Monitored and debugged day to day issues and problem relating to systems, software and servers.
  • Provided 24x7 on-call /Remote Support to resolve the issues regarding server performance.

Environment: Redhat 4/5, Solaris 9, Puppet, Apache 2.2, JBOSS 4.2, Jumpstart, KickStart, LDOMS 1.2, VMware, Veritas Cluster Servers, Solaris Volume Management.

Confidential

Unix/Solaris Administrator

Responsibilities:

  • Analyzed, maintained, deployed, and modified networks, servers, and other IT resources in a mixed Unix/Windows environment.
  • Administered and configured Red Hat 4, Solaris 8 performing periodic updates.
  • Implemented RAID configuration for redundancy members of a team.
  • Configured Telnet, FTP, sFTP, SSH, iptables, Kerberos, Samba for the servers.
  • Deployed, configured and maintained Open Fiber based SAN/NAS units.
  • Designed, built and maintained disaster recovery data center for company.
  • Provided networking support like routing, WAN/LAN, switching and VPN support.
  • Installed and Configured RHEL 5.x on Dell servers using Kickstart and Solaris 8 on sun servers using Jumpstart.
  • Performed volume management using LVM on Linux.
  • Created Users, Group and file system as per the database requirements.
  • Managed packages, and did necessary patches in the system.
  • Monitored system capacity and performance using tools like Vmstat, iostat.
  • Implemented direct and indirect maps for auto mounts in NIS environment.
  • Configured and administered MySQL database.
  • Tuned Kernel parameters based on application and database requirements.
  • Created zones and added storage to an existing storage pool.
  • Installed and configured Sendmail Utility on Sun UNIX servers.
  • Created, troubleshoot and mounted NFS file systems on different OS platforms.

Environment: Sun Solaris 8, Redhat 4/5, Veritas Volume Manager, Veritas foundation suite 5.0, Apache 2.2.x, Web Server 6.x, 7.

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