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Unix System Administrator Resume

Cumberland Rhode, IslanD

SUMMARY:

  • Over 8 years of experience in the administration of IBM AIX, RHEL, CentOS, Sun Solaris, Suse, KVM, VMware on various Hardware Platforms.
  • Extensive Experience in Administration of AIX 4.3/ 5.1/5.2/5.3/6.1/7.1, RHEL 3.x/4.x/5.x/6.x
  • Designed and Performed NIM installation and Kick Start over network and created, maintained installation server, boot server and profile server.
  • Experienced with the installation of Apache 2.x, 1.3.x, 1.2, JBoss4.0.x, ATG Web Servers and, BEA Weblogic 8.x, 9.x servers.
  • Installed Oracle rac,10/11g,9i on IBM AIX and Red Hat Linux and MYSQL on Linux
  • Creating and maintaining user accounts, profiles, security, permissions, disk space and process monitoring
  • Experience in Installation & Configuration of Network Print Servers on Red Hat Linux.
  • Job scheduling using Cron
  • Experience in Installation and Configuration of VERITAS cluster service.
  • Experience in setting up a PXE boot environment with Red Hat Linux.
  • Experienced with installation of packages, patches, maintenance & RPM updates on Red Hat Linux.
  • Configured services like DNS, NIS, NFS, LDAP, Send Mail, on Red Hat Linux and AIX.
  • Responsible for setting up disaster recovery environment for IBM AIX and Red Hat Linux servers and implemented all the DR procedures as per the guidelines.
  • Networking communication skills and protocols such as TCP/IP, Telnet, FTP, SSH, DHCP.
  • Worked with VMware ESX 3.5/4.0/5.0 servers and KVM to create virtual guests.
  • Ensured system security by hardening and auditing the systems as per guidelines in IBM AIX and Red Hat Linux also experienced in system analysis, troubleshooting and performance tuning of operating systems.
  • Scripting done in Korn, Perl, Bash, CSH, Bourne shell and for automated tasks.
  • Extensive use of VI editor for day - to-day system admin work.
  • Possess strong analytical and troubleshooting capabilities, proactive listener and team player with positive approach and excellent grasping power.
  • Experience in leading/working with a team, onsite-offshore models and independent environment. Very good coordinating experience with program managers, testing teams, database administrators and end users.

TECHNICAL SKILLS:

Operating Systems: Linux (RHEL 3.x/4.x/5.x/6.x, Red Hat 8/9 & Debian), IBM AIX 5.1/5.2/5.3/6.1/7.1, Sun Solaris 8,9,10.

Virtualization: VMware ESX 3.5/4.0/5.0, VMware Workstation.

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

Cluster: HACMP.

Web Servers: Apache1.3.x, 1.2, 2.x, JBoss4.0.x, WebLogic, Web Sphere, Java Web Server, Tomcat, IIS 5.0/ 4.0, SAMBA v3.0, Send mail.

Database Servers: Oracle8i/9i, 10/11g, RAC, MS SQL 2000/ 7.0.

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

Servers: IBM RS/6000, and P-series servers ranging from F50,H80,F85,P610,P615,P630,P510,P670,P690,P550, P570, P590, P595,P770. HP DL 320, HP DL 330, HP DL 380s, HP DL 580’S, Dell Power Edge Servers, dell 2300, 2400, 2450,2850,2950,6300.

Programming languages: C, C++, java, HTML programming.

Monitoring tools: Nagios, BMC(Patrol), Tivoli

Scripting: Bash, KSH, Shell Scripting on Red Hat Linux

PROFESSIONAL EXPERIENCE:

Confidential, Cumberland, Rhode Island

Unix System Administrator

ENVIRONMENT: Red Hat Enterprise Linux 5.x/6.x, AIX 6.x/7.x, VIO 2.0, VMware ESX server 5,, LPAR, Oracle 11g, Kickstart, LVM, NIS, DNS, SAN/NAS, BMC, HP DL 380’s, Power 6/7, BL460 c.

Responsibilities:

  • Installed and configured RHEL 5.X/6.X servers using Kickstart.
  • Administered, maintained Red Hat Enterprise Linux 5.X/ 6.X and IBM AIX 6.X/7.X troubleshooting hardware, operating system, applications & network problems and performance issues.
  • Deployed latest patches for RHEL servers, Application servers, database servers and AIX servers, performed RHEL and AIX kernel Tuning.
  • Installed, configured and maintained VNC servers.
  • Created users, managed user permissions, maintained User & File System quota on RHEL and AIX.
  • Experience in automation using tools like Puppet and chef.
  • Management of Puppet automation tool including installation of Puppet agent on client.
  • Configured VMware shell provisioning to install Red Hat Linux guest.
  • Performed server consolidation and virtualization using VMware virtual infrastructure, VMware ESX, VM tools, VSphere.
  • Defined/setup network protocols, Network File Services (NFS) and Network Information Services (NIS) in RHEL and AIX systems.
  • Manage systems using remote consoles like iLO for HP Hardware and HMC for IBM P-Series.
  • Changed LAN IP addresses when IP scheme or switches were changed.
  • Troubleshoot Network issues and fix them.
  • Created bash shell scripts to automate jobs and maintain servers.
  • Used LVM to add, remove and resize Logical volumes.
  • Installed and configured SSH to enable secure access to the servers.
  • Created and managed new network alias for a Network Interface Card (NIC).
  • Created bash script for installation of applications.

Confidential, Orlando, Florida

Systems Administrator

ENVIRONMENT: Red Hat Enterprise Linux 4.x/5.x, Sun Solaris 10, VIO 2.0, HP UX, VMware ESX server5.0, NPIV, MPIO, ZFS, VXFS, HPSA 7.88, Kickstart, Veritas VCSone, LVM, NIS, DNS, Oracle 10g, Weblogic, SAN/NAS, BMC, HP DL 380’s, Sun T2000, T5240, 6900, 4900.

Responsibilities:

  • Administered, maintained Red Hat Enterprise Linux 4.X/ 5.X troubleshooting hardware, operating system, applications & network problems and performance issues.
  • Installed and Configured RHEL 4.X/5.x Servers/Workstations using HPSA on DL 380’s.
  • Implemented and Enhanced the existing scripts which are developed in Bash.
  • Provided support to JBoss and Weblogic Application servers.
  • Used remote console such as ILO for HP to manage servers remotely.
  • Deployed latest patches for Linux and Application servers, performed Red Hat Linux Kernel Tuning and Performed Servers consolidation and virtualization using VMware virtual infrastructure, VMware ESX, Virtual Center, VM tools.
  • Installation, Configuration and Administration of high availability VCSone for failover and redundancy purpose.
  • Management of Puppet automation tool including installation of Puppet agent on client.
  • Installation and configured Oracle Enterprise Linux on Red Hat 4.X, 5.X servers using HPSA.
  • Install and configure SSH to enable secure access to the servers.
  • Performed user administration & maintained centralized sudoers file replicating managed servers using rdist.
  • Involved in installation and customization of Nagios to perform monitoring task on Unix servers.
  • Created users, managed user permissions, maintain User & File System quota on Red Hat Enterprise Linux.
  • Defined/setup network protocols, Network File Services (NFS), and Network Information Services (NIS) in Red Hat Linux.
  • Network troubleshooting using 'netstat', 'ifconfig' and 'tcpdump' etc.
  • Experience in Shell scripting (ksh, bash) to automate system administration jobs.
  • 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.
  • Documented and maintained the inventory using the inventory management tools.

Confidential, Dallas, Texas

Systems Administrator

ENVIRONMENT: AIX 5.3/6.1/7.1, Red Hat Enterprise Linux 4.x/5.x/6.x, Sun Solaris 10, VIO 2.0, HP UX, VMware ESX server4.0, NPIV, MPIO, ZFS, VXFS, Kickstart, Bladelogic, CFengine, LVM, NIS, DNS, Web sphere, Web logic, SAN/NAS, BMC, IBM P570, P590, P770, HP DL 380’s.

Responsibilities:

  • Installing and Configuring RHEL 4.x/5.x/6.x Servers/Workstations using Kickstart on DL 380’s
  • Configuration and Administration of Fiber card Adapters and handling of SAN (Storage array’s, HP EVA, EMC)
  • Worked on planning and configuration of LPARS/D-LPAR’s on IBM P-Series P570, P590, P770
  • Configuring virtual machines using VMWARE to install Linux guest operating systems
  • Implemented hardware Raid on HP DL servers
  • Perform server Virtualization using IBM P-Series servers and Dual VIO’s
  • Configured NPIV and MPIO on VIO servers and their client Lpars.
  • Conducted planning, Implementation and management of NIM Master server and NIM Clients.
  • Installation, Configuration and Administration of high availability Veritas Cluster Servers for failover and redundancy purpose
  • Applied new patches for Linux servers, and installed packages using RPM and YUM
  • OS upgrades to higher Tech level in IBM AIX 5.3, 6.1
  • OS Migration from IBM AIX 5.3 to AIX 6.1, with coordination from application team
  • Migrated IBM Lpars from p570 frame to p770 frame
  • Configuring & Managing disks using LVM on Red Hat Linux and IBM AIX
  • Configuring & Managing disks using VERITAS Volume Manager on Solaris
  • User account management in a complete NIS and DNS environment, with all user home directories automounted.
  • Provided support to Websphere and Weblogic Application servers.
  • Implemented and Enhanced the existing scripts which are developed in Bash and Korn.
  • Scheduling the jobs using CRON tab
  • Used remote consoles to manage servers remotely, ILO for HP and HMC for IBM Lpars.
  • Worked with IBM in replacing failed power supplies, DIMMS, Fiber cards.
  • Provided 24 x 7 System Administration support for AIX 5.3/6.1/7.1 based servers and Red Hat Linux 4.x, 5.x servers and resolved trouble tickets on shift rotation basis.

Confidential, Minneapolis, MN

Systems Administrator

ENVIRONMENT: AIX 5.1/5.2/5.3, Red Hat Enterprise Linux 4.x/5.x, Red Hat Linux 8/9, Logical Volume Manger for Red Hat Linux and AIX, SAN/NAS Apache 2.0, Web Logic, Web Sphere, Nagios, IBM P570, p590, 595, Dell 2400, 2450, 2850, 2950.

Responsibilities:

  • Installing, Configuring, Monitoring and Troubleshooting IBM AIX 5.1, 5.2, 5.3, RHEL 4.x/5.x, servers on P-Series, Dell and Compaq hardware platforms.
  • Add, remove and resizing Logical volumes using LVM in Red Hat Linux and implementing software RAID at installation time.
  • Define/setup network protocols, Network File Services (NFS), and Network Information Services (NIS) in Red Hat Linux and IBM AIX systems.
  • Configuring Virtual Machines under VMware ESX Servers to install Red Hat Linux guests.
  • Configure and Implementation of Samba v3.0 to help printing and file sharing in the mixed environment.
  • Maintenance level upgrades and software administration on AIX & RPM installation on Red Hat Linux using up2date and yum.
  • Administered Red Hat Linux servers for several functions including managing Apache/Tomcat server, mail server, FTP/TFTP, My-SQL database, and firewalls using IPTABLES in both development and production.
  • Configuring Kick Start Servers and booting the images using PXE in Red hat Linux.
  • Implementation and Management of Disk Quota on Red Hat Linux as well as NetApp filers.
  • Implementation of SSH for secure transfers and implementation of PKI between servers to enable password less logins between Servers.
  • Configured IP bonding for failover load balancing.
  • Configured multipath for SAN.
  • Configuration of Apache web server and JBoss for web applications.
  • Setup, installation and participation in the ongoing development of WebSphere Application Server on AIX machines.
  • Performing O/S and kernel upgrades on IBM AIX from 5.1 to 5.2 and Red Hat Linux servers.
  • Installing, configuring and deploying applications on Weblogic Application Server 8.x, 9.x.
  • Installation, Configuration, troubleshooting & maintenance of ATG application server for e-commerce clients.
  • Scripts written in Perl shell for daily monitoring of servers regarding the number of hits, database connections and middle tier connections.
  • Diagnosed hardware and software problems using DIAG and ERRPT and provided solution to them.
  • Manage systems using remote consoles like ILO for HP Hardware and HMC for IBM P-Series.
  • Troubleshoot backup issues, Perform manual backups & restore on VERITAS Net Backup.
  • Document and maintain the inventory using asset management techniques.

Confidential, Northhaven, CT

Systems Administrator

ENVIRONMENT: IBM AIX 5.x, Red Hat Enterprise Linux 4.x/5.x, Suse, VMware ESX Server4.0, JBoss4.0.x, Apache2.0, SAN/NAS, Web Logic, IBM P570, P590, P595, Dell 2400, 2450, 2850, 2950,HP DL460c.

Responsibilities:

  • Installation and Configuration of Red Hat Linux and used Kick-start for unattended Installation.
  • Installation and Configuration of IBM AIX Servers and Suse.
  • Administered multiple IBM machines (P570, P590, P630, P670, P690) running on AIX 5.1/5.2, coordinated with application team to Upgrade from AIX 5.1 to AIX 5.2.
  • Administered UNIX Systems for clustered AIX Servers running Dynamic LPARs with fiber attached SAN storage.
  • Maintaining Red Hat Enterprise Linux 5 servers in development, test and Production environment and proactively monitoring and administering production and development servers.
  • Involved in applying new patches and packages for Linux Servers and handled issues arising out of them.
  • Implementation of advanced partitioning schemes using Software Raid and LVM.
  • Implemented Virtualization using VMware ESX Server 4.0 in Red Hat Linux on HP-460C Blade, Dell-2950.
  • Performed Servers consolidation and virtualization using VMware virtual infrastructure, VMware ESX, Virtual Center, VM tools.
  • Implemented high-availability applications based on the Unix/Java stack, mainly the JBoss Application server on top of Red Hat Linux OS.
  • Provided support for JBoss 4.0.x and apache 2.0, ATG applications for operation related to installation and configuration.
  • Worked with Database administrators to tune kernel for Oracle installations on Red Hat Linux.
  • Involved in troubleshooting the performance issues related to web application running on virtual machines.
  • Interacted with different hardware and software vendors to troubleshoot the hardware and software problems
  • Prepared Technical Design Specification Documents (TDS) and SOW required for datacenter migration.
  • Drafted shell scripts for automated installations, to extract logs.
  • Configuration of IPTABLES, NIS, NFS, SENDMAIL, FTP, SSH, SAMBA and DHCP Server.
  • Supported Web sphere and Web logic Application servers.
  • Configuring Storage to Red Hat Linux systems using Multipath.
  • Worked with engineering team to resolve tickets related to engineering issues like firewall change requests.
  • Worked with Red Hat support personnel to troubleshoot red hat satellite server regarding updates.
  • Provided Round the clock support to solve Production issues.

Confidential, Overland Park, Kansas

UNIX - Linux Administration

ENVIRONMENT: RHEL 4.x/5.x & Windows 2003/XP Professional, KVM, Sun Enterprise 4500, Sun Enterprise 250, IBM RS/6000, Genicom Printers and Laser Jet Printers, VERITAS volume manager 4.1, VCS 4.0, VERITAS Net Backup 4.0, ZFS

Responsibilities:

  • Installing and Configuring of hardware and OS on servers/workstations and I/O devices on E25k environment.
  • System builds from the scratch for RHEL 4.x/5.x and Solaris 8,9 systems.
  • Installing and configuring new hard drives on Red Hat Enterprise Linux systems.
  • Installed virtual machines on KVM.
  • Management and migration of Packages and Patches on Linux and Solaris systems.
  • Performed user administration & maintained centralized sudoers file replicating managed servers using rdist.
  • Created disk groups, volume, volume groups and RAIDs using Veritas Volume Manager.
  • Involved in disk configuration and disk crash recovery using format and fdisk. Bad spots on disk were repaired using repair and analyze. Created new slices, mounted new file systems and unmounted file systems.
  • Installation, Configuration and Administration of High Availability Veritas Cluster Servers for failover and redundancy purpose.
  • Created Korn shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation
  • Involved in preparation of functional and system specifications. Estimated storage requirements for applications.
  • Installed all the required Software, patches, documentation, licensing trouble shooting.
  • Setup various user profiles, environment variables/security to ensure smooth operation.
  • Installed and configured VMware.
  • Changed LAN/WAN IP addresses and speed of servers when customers IP scheme or configuration of switches were changed
  • Installing and configuring Oracle 8/9i database on Sun Solaris Servers.
  • Applied patches on Oracle owned software.
  • Plan, document and implement for Disaster Server Recovery and documenting Maintenance process and change management.

Confidential, Atlanta, GA

Systems Administrator

ENVIRONMENT: RHEL 3.x,4.x, VMware, Windows Server 2003, NIS, DNS, SAMBA, RAID, LVM, MSSQL. Dell PowerEdge and HP Proliant Servers and Blades

Responsibilities:

  • Installing and Configuring RHEL 3.x & 4.x.
  • Implementation and administration of kickstart.
  • Day to day maintenance of our IBM servers as well as deployment and upgrades of current production servers to RHEL4.
  • Implemented Xen and VMware environments.
  • User account Management using NIS
  • Package management using RPM and errata using UP2DATE.
  • Performed Kernel upgrades and configuration
  • Scripting done in Bourne Shell.
  • Trouble shooting the problems regarding NIS, DNS, SAMBA and DFS.
  • Configured and maintained system security using IPTABLES and TCPWRAPPERS
  • Managing disks involving adding new disks to the system.
  • Configured samba server for windows clients.
  • Mounting, un-mounting, Partitioning and creating new file systems.
  • Implemented mail server with send-mail servers.
  • Knowledge and configuring and setting up cluster management.
  • Worked on web servers in load balancing environment.
  • Installed RHEL 3&4 on HP Blade BL20p servers.
  • Setup Linux workstations with hardware and software RAIDS and implement LVM. Configure and maintain clustered RAID subsystems.
  • Creation of crontabs and scheduling tasks.
  • Maintained uptime of production servers in 24x7 environments.

Confidential, Richmond, VA

Systems Engineer

Environment: IBM RS/6000, RHEL 3.x,4.x, LVM for Linux/AIX, Apache 2.0, Send Mail, NFS, Kick Start, IIS, Squid, and Samba.

Responsibilities:

  • Installing & Configuring Red Hat Linux, IBM AIX operating systems .
  • Upgradation of Operating System Environment/ kernel patches, packages, web server, and applications.
  • Building Servers using Kick Start.
  • Performing routine backup and restore using VERITAS Backup-Exec manager/ manual of all enterprise servers.
  • Installing and configuration of IIS, Apache, and Samba.
  • Installing, configuring and updating LDAP, DNS, DHCP, NFS, NIS and NIS+ on red Hat Linux & IBM AIX servers.
  • Configuration of network using Squid to increase network performance.
  • Configuring & Managing disks using LVM on Red Hat Linux and IBM AIX.
  • Review server loads and recommend load balancing for optimization.
  • Configuring IP connectivity, routing, checkpoint firewall and network interfaces. Also maintaining network connectivity of servers.
  • Run scripts to check system connectivity, database connectivity, file system usage and log files.
  • Assisting the Network Engineer in evaluating software for security bugs and networking up gradation in vendor software.
  • Performing capacity planning and performance tuning swap space, paging, share memory file systems, disk space, Daemons, web server processes, & SSH.
  • Interact with Third Party Vendors for support and escalation of cases.

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