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Sr. Linux/unix Administrator Resume

TX

SUMMARY:

  • Seven years of experience in UNIX /Linux System Administration extensively worked on Linux (RHEL 7/6/5/4/3), Solaris (11/10/9/8), HP - UX (11.x/10.x), and Windows (2008/2003/2000 ) administration.
  • Experience in installation, support, configuration, performance tuning, troubleshooting maintenance of Linux using Kick start and Interactive installation.
  • Experience in RPM Package Administration for installing, upgrading, and checking dependencies. Reconfiguring RPM database using RPM Build and creating YUM repository in Red hat Linux.
  • Experience in implementation of services like NFS,NIS, NIS+, DNS, DHCP, LDAP, Mail servers and Samba servers.
  • Involved in installation, configuration and administration of Apache Web server, Oracle Servers.
  • Developed UNIX shell scripts using Korn, C Shell Scripting, SED, and AWK to ease the administration tasks
  • User profile management and IIS administration on windows servers.
  • Worked on intergrating LDAP with Windows Active Directory Server.
  • Knowledge of selinux concepts in RHEL5&6.0, Network monitoring tools (netstat, nmap, tcpdump), partition creation, Boot process, File permissions, sudo, ACL, SSH, Telnet and SCP.
  • Involve in administration and maintenance of ISA server, Exchange Server, Active Directory Service, DHCP, DNS, FTP, Web server in Windows environment.
  • Good experienceon installation/upgrade VMware ESXi 4.1/5.0/5.1
  • Configuring VMware Virtual Hardware, Memory, NIC and VDISK
  • Good experience on VMware, migrating P2V/V2V using Vmotion and DRS, HA configurations
  • Experience in Configuring, Administering & maintaining Veritas Logical Volume Manager (VxVM)&Cluster Server.
  • Experience in using Veritas Net Backup, Proficient in System Backup and Recovery from tapes using ufsdump, ufsrestore, tar and cpio
  • Managed Cisco based network, administration of routing and switching.
  • Strong working knowledge of Routers and Switches, Subnetting, VLAN, TCP/IP, VPN, OSI model, Firewall (checkpoint).
  • Experience in creation & maintenance of file systems, and User & Group Administration.
  • Performed memory and process management and troubleshooting.
  • Administering operating systems, hardware, and peripheral components, and maintain databases.
  • Capable and experienced in managing personnel, customer relationships, and request fulfillment.
  • Excellent communication, analytical, and problem solving skills. Experience in logical troubleshooting and root cause analysis.
  • Enjoy being part of, as well as managing, motivating, successful and productive team, and thrives in highly pressurized and challenging working environments.

TECHNICAL SKILLS:

Operating System: Red Hat Linux 6/5/4/3 Solaris 10/9/8, HP-UX 11.0, 11.11, 11.23, 11.31, Confidential AIX 5.x/4.3, Windows 2008/2003/2000.

Hardware: Sun Fire 280R/V 480/3800/4800/10 K/12K/25K Server, Sun Enterprise 6500/4500/450/ 420 R/250 Servers, T-Series, M-Series, SunBlade 6000, HP-9000 K,L,N series, Proliant DL585/360/380 G5, G6, p3440/rp7440/rp 8440 Server, Confidential RS/ / M80 / H70 / H50 Series server and pSeries, HP/Dell/ Confidential /Sun Blade Servers.

Network and Security: ISA Server, Exchange Server, Active Directory Service.

Broad experience with: VMWare, Firewalls and VPNs. Comprehensive knowledge of security protocols: IPSec, L2TP, PPTP and WEP (Wireless Encryption Protocol) NFS, NIS, NIS+, DHCP, Proxy Server, DNS, LDAP.

Web Servers: Apache 2.x/1.3x, Tomcat, WebLogic 10/9/8 & Web Sphere 6.0/5.0/4.0

Programming Language: Object Oriented C++ (MFC/Windows API/Networking),Visual Basic, Java, HTML/Web development, Active Server Pages and Java Server Pages, ColdFusion

Database: Oracle, UDB, MS SQL Server, MySQL, MSAccess

EXPERIENCE:

Confidential, TX

Sr. Linux/Unix Administrator

Responsibilities:

  • Installation, configuration and upgrade of RHEL 5&6, SUSE Linux 10/11, Solaris 8/9/10, HP-UX 11.11/11.23/11.31 , Windows(2008/2003) operating systems.
  • Installing, configuring and maintaining the VMwareESXi 5.0/5.1 andUpgrades.
  • Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back usingVMWARE Cluster Server in SAN environment.
  • Upgraded Windows 2003 R2 to 2008 R2. Used Windows P2V converter.
  • Hands on experience in Virtual standard switch, Virtual Distributed switch, VLAN mapping into VMware
  • Experience VMware clustering, HA, DRS rules,
  • Creating Virtual Machine Template for Golden Client, based off of which VM’s are deployed.(ESX, VMware)
  • Building virtual Linux machines in VSphere client.
  • Resource allocation and guest OS specifications and change in VSphere Client.
  • Member to a team of professionals responsible for the day-to-day administration and maintenance of the IT infrastructure to include onsite administration and support, scheduled installation, configuration and troubleshoot activities.
  • Installed, Update patches and other software packages using rpm and yum repositories.
  • Installation, configuration and administration of Redhat Cluster Server and Veritas Cluster Server
  • Installed, configured and managed Oracle Real Application Cluster (RAC) in Solaris, HP-UX and Linux servers.
  • Patch and Package administration for installation of patches as per company policy and installation of packaged application.
  • Expertise in Global File System (GFS), Creating, configuring and managing clusters in Redhat LinuxServers using GFS.
  • Configured I/O multipathing and NIC multipathing/Bonding.
  • Maintaining, and configuring services like NFS, NIS, NIS+, DNS, DHCP, LDAP, Mail servers, proxy servers, and Samba servers.
  • Disk and file system management thru Logical Volume Manager (LVM), Veritas Volume manager (VxVM) and Solaris Volume Manager (SVM).
  • Knowledge of Puppet configuration management tool.
  • Installed, configured and maintained the Apache, MySQL and PHP in Linux and Windows environment (LAMP/WAMP).
  • Built high-end servers, creating and loading images on Solaris, HP-UX and Linux servers.
  • Worked on group/user administration, start up and shutdown scripts, crontabs, file systemmaintenance and backup scripting and automation.
  • Analyzing & monitoring system performance through various system tools such as netstat, vmstat and iostat.
  • Troubleshooting and analysis of hardware and software failures for various Linux servers (core dump and log file analysis).
  • Conduct research to identify possible solutions and write technical documentation.
  • Actively involved in technical meeting and provide reports and presentation to upper level management.
  • Work in a team for network design and security implementation.

Confidential, PA

Sr. Unix/Linux Administrator

Responsibilities:

  • Installation, Configuration & Upgrade of Solaris, Red-hat Linux, AIX, HP-UX operating systems.
  • Installation of patches and packages, Installation & configuration of Jumpstart/Flash archive, Ignite and kickstart servers.
  • Administered DNS, NIS, NIS+ and NFS, Send Mail and involved in troubleshooting.
  • Installing, configuring and maintaining the VMware ESX / Virtual Center servers.
  • Experience in VERITAS Cluster Server, Redhat Cluster Server, Zone administration and configuration.
  • Installation and configuration of Veritas Volume Manager, Veritas File System and Veritas Netbackup.
  • Configured GFS (Linux) and ZFS (Solaris) filesystems.
  • Responsible for creating, cloning Linux Virtual machines using VMWare virtual client 3.5.
  • Disk and File system management through Veritas Volume Manager, Solaris Volume Manager, Logical Volume manager.
  • Worked on Solaris 10,Service management on Solaris 10 through SMF; User administration and managing file systems; Created Oracle/UDB users and assigned appropriate permission.
  • Configuring & handling Samba servers on Linux, Managing file system.
  • Installation, Configuration and Administration of Websphere and Apache Servers.
  • Having production experience supporting and deploying to web application servers such as BEA WebLogic, Red Hat JBoss, Apache, Tomcat, and Apache HTTPD servers.
  • Worked on Solaris container Technology; Created local and global zones.
  • Solaris zones configuration for application; Server Build from the scratch with CD and Automated Installation; Implemented Security Hardening per company policy; Trouble shooting system and user problems.
  • Added Service Groups and resources based on the requirement with appropriate dependencies, Documented the in change design/Architecture diagram of Veritas Cluster Servers.
  • Planning and implemented Disaster Recovery sites from the scratch; Involved in disaster recovery testing every quarter.
  • Experience of Storage Area Network/SAN, EMC Symmetrix/ Clarriion.
  • Worked on configuring & troubleshooting of SuSE Linux 10.x/11.x.
  • Involved in on-call pager rotation for production support; Demonstrated skill in supporting end users and proven ability to plan, organize and work as a member of a technical project team, both in small groups as well as large corporate areas.

Confidential, Madison, WI

UNIX Administrator

Responsibilities:

  • Installation, Configuration & Upgrade ofLinux,Solaris, AIX, HP-UXand Windows operating system.
  • ConfiguringNFS, NIS, NIS+, DNS, Auto-mountand disk space management onSUN servers.
  • Installation and configuration ofHP-UX Serversthru ignite server, patch depot management for ignite server.
  • Worked on Data Center Migration Project. MigratedLinux/UnixServers from one data center to other data center with minimal downtime.
  • Configuring andAdministering NFS, SMTP, DHCP, Samba Serverin heterogeneous environment.
  • Performed automated installations of Operating System usingJumpstartfor Solaris.
  • Installation of patches and packages.
  • Installation and configurationof Veritas Volume Manager, Veritas File System.
  • Experience in installation, configuration and administration ofWebLogic and Websphere Servers.
  • Extensive use of volume management tool usingVeritas Volume Managerto create disk groups, volumes withRAIDarchitecture and layered volumes.
  • Experience with configuring and managing Virtual disks, Disk Mirrors andRAID 0,1and5levels.
  • UsedVxVMto add disk, create new disk groups/volumes, resize, deport and import disk groups between servers.
  • Worked onSolaris 10 container technology,createdlocal and global zones, modified local zone parameters, created file systems on local and global zones.
  • CreatedZettabyte file system (ZFS) in Solaris 10. Created zpools. Exported ZFS from local zones to local zones.
  • Supported Oracle RAC (Real Application Cluster) database.
  • Managed resources for zones using Solaris 10 container technology.
  • Created/used LDOM in Solaris 10 and installed multiple OS.
  • Configured and administeredMail Server/SMTP server on Linux.
  • Experience in Red Hat Cluster Suite and Global File System, RedHat Network Satellite Server.
  • Package management usingRPMand Errata usingUP2DATEin Linux
  • Creatingmetadevices, soft partitions, mirroring the devices and metasets.
  • Space allocation to themetadevices,detachingandclearingthe devices if not in use.
  • Troubleshooting and building high end serversE15K,E25Kand midrange serversSunfire 6800
  • Performed automated installations of Operating System usingJumpstartfor Solaris andKickstartforLinux.
  • Configured new service group and resources for new application in Veritas Cluster Servers.
  • Maintaining theCPU & Memory utilization of Servers reports on the WEB.
  • Participation in change control activities and involved in Memory sizing of different applications.
  • Complete periodic checks of production and development systems;CPU utilization, memory profiles, disk utilization, network connectivity, system log files, etc.
  • Worked on server consolidation and migration.
  • Configuration and Administration ofVeritas Cluster Server.
  • Extensively worked in data and database migration from older machine to latest configurations.
  • Installation, setup, configuration, security administration and maintenance for flavors of servers.
  • Proactive maintenance on systems by timely upgrading Patches to the systems and Scheduling of batch jobs andCron jobs.
  • Monitor performance and resource utilization of key systems and provide ongoing trend analysis for forecasting future resource requirements.
  • Preparation of performance acceptance criteria drafts for newer applications.
  • Implemented Security Hardening per company policyusingSolaris 10 features.
  • Involved in disaster recovery testing every quarter.
  • Supported 24/7 high availability production servers.
  • Verify successful completion of daily incremental and database backups, following developed procedures.

Confidential

Linux/Unix System Administrator

Responsibilities:

  • Administration and auditing the SUN servers and installation of the patches on production and development systems.
  • Configuring NFS, NIS, DNS, Auto-mounter and disk Space management on SUN servers.
  • SENDMAIL configuration and administration, testing the mail server.
  • User administration, management & archiving.
  • Installation of VERITAS Netbackup on Client side.
  • Troubleshooting the network issues and response problems
  • Creating new file systems, managing and checking data Consistency of file systems.
  • Dealing with user id deletion with removing entries from CRONTAB.
  • Maintaining the CPU & Memory utilization of SUN Servers reports on the WEB.
  • Experience with OS upgrades and installation of third party software, packages and patches.
  • Scheduling full and incremental backups using NetBackup on daily, weekly and monthly basis.
  • Experience with adding and configuring devices like Hard disks and Backup devices etc.
  • Experience with configuring and managing Virtual disks.
  • Mirrors and RAID 0, 1 and 5 levels.

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