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Unix/linux Administrator Resume

New York, NY

EXPERIENCE SUMMARY:

  • Over seven years of experience in the administration of IBM AIX, Red Hat Linux, RHEL, VMware on various Hardware Platforms.
  • Extensive Experience in Installation and Administration of AIX 4.x/5.x/6.x/7.1, Red Hat Linux8/9, RHEL 4.0/5.0/6.0 Server family.
  • Designed and Performed NIM installation and Kick Start over network and created, maintained installation server, boot server and profile server.
  • Experienced with the installation and configuration on Apache 2.x, 1.3.x, 1.2, JBoss4.0.x, ATG Web Servers and, BEA Web logic 8.x, 9.x servers.
  • Expertise in configuration and pre - installation tasks of RDBMS Installation including Oracle rac,10g,9i on IBM AIX and Red Hat Linux and MYSQL on Linux
  • Proficient in installation and configuration of Web Sphere Applications on Red Hat Linux and the Unix Flavor of IBM AIX.
  • Experience in Installation & Configuration of Network Print Servers on Red Hat Linux.
  • 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.
  • Extensive hands-on experience in AIX Logical Volume Manager (LVM), OS Upgrades and Servers Disk Crash Recovery using mksysb (AIX).
  • Worked on installing AIX on an LPAR environment P-Series including configuring VIOS.
  • Configured services like DNS, NIS, NFS, LDAP, Send Mail, FTP, Remote access 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.
  • Worked with VMware ESX 2.x servers, and Virtual Infrastructure client to create virtual guests.
  • Good experience in Storage Area Network (SAN),EMC Symmetrix/ Clariion, NAS, Experience inMulti-pathingusingEMC Powerpath, VeritasandMPIO.
  • 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.
  • Basic scripting done in Korn, Bash, and CSH for automated tasks.
  • Responsible for reviewing and providing technical support for technical documentation of UNIX server builds and disaster recovery operations.
  • 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 System: Red hat Linux 8, 9,10, RHEL 3/4/5, Solaris 10/9/8, HP-UX (11.0.11.11 , 11.23, 11.31), IBM AIX (5.1, 5.3), Windows NT 4.0/2000/2003/2008/ XP,VMware ESX 3.5,4.0

Hardware: Sun Enterprise E 5000/5500/4500/450/420 R/250/6500Sun Fire 280R/V 480/ 3800/4800/6800 , E10K/15 Series server, TSeries, MSeries Servers, HP-9000, rx8640, rp7420, rp8420, N-Class, L-Class, D-Class, K-Class, IBM e-Server Regatta P690, P570, RS6000, IBM/HP/DELL Blade Servers, SAN, NAS Storage Box, SAN switch etc.

DE Storage: SAN, NAS, DAS EMC Storage, HP and IBM Storage, HDS

Third Party Tools: Veritas Volume Manager, Logical Volume Manager, RAID, Veritas Cluster, Sun Cluster, HP Service Guard, Redhat Cluster SAR, LVM, FTP, SSL, VMware virtualization, VMware ESX, RAID Technologies.

Web /Application Server: Apache, iPlanet 4x/5x. Web sphere Application Server (WAS)3.5,4.0, Netscape/iPlanet Server, MQSeries, Web Logic, JBoss, Server, IBM HTTP Server, HTML, DHTML, XML, Java Script, JSP, Servlets, EJB

Languages: Perl, Shell Scripting and knowledge in C/C++,Matlab, HTML

Network/Naming Services: NIS, NFS, AutoFS, DNS, DHCP, NIS+, LDAP

Database: Oracle (9i, 10g, 11g) with RAC and Dataguard, DB2/UDB 7/8.

PROFESSIONAL EXPERIENCE:

Unix/Linux Administrator

Confidential, New York, NY

Responsibilities:

  • Installed/configured/managed/Administrated of all UNIX/LINUX servers, includes the design and selection of relevant hardware to Support the installation/upgrades of Red Hat (5/6), CenOS 5/6, Fedora core operating systems
  • Performed Building up of servers, deployment activities, and environment support including installation, configuration diagnostics, planning and upgrades.
  • Configured 4 Node oracle and 6 Node Mysql Redhat Cluster on Redhat EL 5
  • Responsible for design and implementation of IT infrastructure such as data center, servers, storage, backup, and virtualization.
  • Support for Linux/Unix systems administration, operational support and problem resolution for server systems Created shared NFS files system, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting &Stopping the NFS services.
  • Responsible for Installation, configuration, Maintenance, Deployments, Update,, Monitoring, performance tuning on Linux.
  • Experienced in monitoring and debug performance issues on different OS Linux (RHEL & Centos),
  • Systems log management, Data backup and restoration with UNIX native tools (tar/dd).
  • Managed DNS server. Updated forward and reverse lookup files for all the new machines added in the domain. Created reverse lookup files for the new subnets added into the network.
  • Created Storage Group, Zones, volume groups, and different RAID’s using EMC Utility and responsible for backup and recovery using NetApps Snapshot.
  • Repaired bad spots on the disk using repair and analyze. Used format and fdisk/Parted for disk configuration and disk crash recovery.
  • Design and Deploy In house (Private Cloud) using eucalyptus and Openstack on Centos and Ubuntu OS
  • Installed and maintain puppet-based configuration management system
  • Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure.
  • Deployed mcollective for orchestration.
  • Using Puppet configuration management to manage site on EC2 Amazon, Rackspace public cloud.
  • Configuring Caching technologies like Aicache internally, and Akamai externally for better site performance.
  • Configure and managing LVM on Linux using tools like lvextend, lvcreate, resize2fs etc
  • Performed daily housekeeping functions, such as establishing new accounts, creating and resetting passwords, developing, scripts, performing system backups and recovery, and installing software patches and updates.
  • Developed Cron jobs and Shell Scripts (Shell, Python) for automating administration tasks like file system management, process management, backup and restore.
  • Wrote Python and Shell scripts to monitor installed enterprise applications and to get information from the logs and database in the required format and other daily activities and jobs.
  • Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, FTP, TCP/IP, ARP, Applications and print servers to insure optimal networking and printing functionality.
  • Worked on FTP servers for sending and receiving files between local and remote servers.
  • Configured Open source tools like Nagios, Cacti, OSSEC, Zabbix, Centreon for Monitoring
  • Providing 24*7 on-call support on rotation basis and Handling High priority incidents through bridge calls.

Environment: Red-Hat Linux Enterprise servers (HP Proliant DL 585, BL 465/485,ML Series, SAN(Netapp), BladeLogic, Veritas Cluster Server 5.0, Windows 2003 server, Shell programming, Jboss 4.2, JDK 1.5,1.6,, VMware Virtual Client 3.5, VMware Insfrastructure 3.5.

UNIX System Admin

Confidential, Dallas, Texas

Responsibilities:

  • Implementations, troubleshooting, analyze and proactively monitored Red Hat systems for the Enterprise.
  • Applying the Server Hardening procedure to all the company owned servers to reduce the risk to the company’s business systems by implementing Security standards on servers from falling victim to both internal and external attacks.
  • Worked on server hardening for: Linux, Red Hat Enterprise Linux 3/4/5, Solaris 8/9/10, Windows server 2000/2003/2008.
  • Installation of Patches on the servers which are running different applications
  • Validate that the server is fully patched with all firmware and OS critical updates
  • Troubleshooting, Patching, Upgrades and Back-ups when required
  • Modify the Kernel Tuning parameters based on the application requirements
  • Create users, manage user permissions, maintain User & File system quota on Linux servers.
  • Failover clustered servers for RED HAT clusters.
  • Configured Multipath for SAN .Recompile the RDAC driver once harden the server.
  • Worked on migration of VMware ESXi 4.0 to vSphere ESXi 4.
  • Performed server rack mounting and managed /retired old rack optimized servers
  • Administering NFS Mounts
  • Writing Shell Scripting for checking the security setting of the server and changing the server settings
  • Acquiring & Initializing LUNs in clustered & stand alone environments.
  • Installation and configuration of Apache Web Server 1.3 for Various intranet/extranet websites
  • Configuring IP connectivity, routing, checkpoint firewall and network interfaces. Also maintaining network connectivity of servers.
  • Implemented Network File System(NFS) for file sharing and network installation
  • Day to Day activities included handling Security issues like stale UNIX account Cleanups, 90 day password changes, setting max age and min age, creating a list of umask permission for various users
  • Responsible for backup of all servers and recovery of all servers
  • Configured clustering by using Veritas Cluster Server (VCS).
  • Managed Storage Area Networks (SAN). Managed nodes running under SAN environment through HACMP
  • Tuning the kernel parameters based on the application/database requirement
  • Collect and analyze current system settings. Evaluate, test, and deploy audit remediation settings.
  • Monitor ticket queue to attend user and system calls, attend team meetings, change control meetings to update installation progress, and for upcoming changes in environment
  • Documentation of all the steps done as part of the Server Hardening process
  • Install ITCM agent after the Server Hardening process
  • Create change order request and exception request for Hardening production servers and resolve it once Hardening is completed.
  • Collect and analyze current system settings.
  • Installed Agent to ITCM using automatic as well as manual procedure.
  • Implementation of Samba to help printing and file sharing in the mixed Environment
  • Document and maintain the inventory using asset management techniques.
  • Make recommendations to improve and maintain audit processes
  • Work closely with A. H. Belo IT teams to document system settings
  • Research, evaluate and recommend improvements for the A. H. Belo Red Hat environments.
  • Document and maintain the inventory using asset management techniques.

Environment: Red Hat Linux (RHEL 4/5), Logical Volume Manager, Veritas Cluster Server, Global File System, Red Hat Cluster Servers, Oracle, mysql, Sun Solaris 8/9/10,AIX 5.3L,Windows, Veritas Volume Manager, Veritas Net backup, Ksh/Perl programming, DNS, NIS, NFS, Apache, Tomcat, CA IT Client Manager (CA ITCM), CA Patch Manager, CA Service Desk Manager, Varnish servers 2.1.4, 2.1.5,windows server 2000,2003, 2008, VMware ESX 2.x,HP-UX.

UNIX System Admin/Engineer

Confidential, Houston, TX

Responsibilities:

  • Installation, Configuration & Upgrade of Linux, AIX, HP-UX, Linux operating systems
  • Installation of patches and packages.
  • Upgraded Solaris 8 to Solaris 9 and 10. Configuring SAN Sun Storage. Through Brocade Silkworm Switches. Fiber Optics Switch for redundancy with multi-path.
  • Cloud Computing: Experience with VMware Virtualization using ESX hypervisor of Vsphere 4.0.
  • Configured Solaris Jumpstart Server. Maintained Server 6.0. Backup data of Servers using VERITAS Net Backup. Maintained Security of the Solaris Servers.
  • Configuration of VERITAS Cluster Server, Service Guard from the scratch and maintained service group/packages for failover and redundancy purpose.
  • Worked on high performance applications in a clustered environment.
  • Worked on Solaris 10 container technology, configured separate zones for various applications.
  • Involved in Implementing and Administrating enterprise level data backup and recovery.
  • Implemented Backup solution for the Network
  • Installed and configured file and Application servers running on Sun servers
  • Configuring and maintaining network services such as LDAP, DNS, NIS, NFS, Web, Mail, FTP
  • Implementation of RAID 0/1/5 for creation of logical volumes using VERITAS Volume Manager in SAN Storage Area Environment
  • Managed Network troubleshooting applications TCP/IP including Ethernet, IP addressing & Sub netting, routing
  • Worked on creating user accounts, user administration, local and global groups on Solaris platform
  • Created User Accounts and Network Shares. Configured SUN Workstations as Domain Clients.
  • Administrated NFS, NIS, DHCP and DNS Samba services running on AIX and Red Hat Linux.
  • Worked with Storage team to configure EMC SAN, NAS and iSCSI configuration.
  • Managed Users for AIX, HP-UNIX and Linux Servers and assigned rights to access network resources.

Environment: Red Hat Linux (RHEL 4/5), Logical Volume Manager, Veritas Cluster Server, Global File System, Red Hat Cluster Servers, Oracle, mysql, Sun Solaris 8/9/10,AIX 5.3L,Windows, Sun Fire 3800/4800/6800 , V890, V880, V490,V480 and V210, VCS, Veritas Volume Manager, Veritas Net backup, Ksh/Perl programming, DNS, NIS, NFS, Apache, Tomcat.

UNIX Administrator

Confidential, Menomonee falls, WI

Responsibilities:

  • Installation, Configuration & Upgrade of Solaris, AIX, HP-UX, Linux and Windows-NT operating systems.
  • Installation Packages and patches.
  • Supported 24/7 high availability production servers.
  • Monitoring System using HP/ITO, Do kernel tuning to enhance the system Performance.
  • Configuration and Administration of DNS, NIS, NIS+, NFS, send mail.
  • Installation, configuration and remediation of various Security software
  • Expertise in VMware Virtualization using Vsphere 4.0.
  • Installation and configuration of Netscape and Apache web server and Samba Server.
  • Jumpstart installation. Writing Shell and Perl Scripting for automation of job.
  • Configuration of Hardware and Software RAID. Disk replacement and File system recovery.
  • Interaction with vendors for Hardware and software supports.
  • Configuration and Administration of Veritas Cluster and MC Service Guard.
  • Day to day maintenance of Veritas cluster Servers and MC Service Guard.
  • Disk and File system management through Veritas Volume Manager, LVM and SVM.
  • Experience in working in high performance applications in a clustered environment.
  • Installation and configuration of Apache and Websphere Server in Linux Platform.
  • Backup management through Veritas Netbackup. Creation of Volumes and pools and scheduling the job.
  • Installation and configuration of Network Printer with Centralized control of print client.
  • Trouble shooting of day to day system and user problems.
  • Arbitrated Customer/User meetings to establish needs, initiated/managed risk assessment team, define expectations and explain capabilities of current technologies.
  • Documented (formally) system requirements
  • Oversaw customer installation and acceptance testing of the product, Product resided on Sun/Veritas configuration.
  • Trained customer user community.
  • Assisted team members in contracts, availability / problem resolution, technical Tier 1/2 support and security.

Environment: Solaris 8/9, Linux, HP-UX, AIX, Sun Enterprise Servers E5500/E4500 and E3500, Sun Sparc 1000, HP N/L Class servers, rp Series Server, HP Superdome, Oracle, Shell Scripting, Apache, Tomcat.

UNIX Administrator

Confidential, Pittsburgh, PA

Responsibilities:

  • Installed, Configured and Supported RHEL 4.6/5.X AS.
  • Installation and Configuration of VMware ESX servers
  • Deploying and maintaining of the Virtual Machines.
  • Configuring Lights Out Management (LOM) for Remote Access
  • Successfully implemented Kickstart-PXE for the First time in the environment
  • Design and set up a three node Oracle 10g Real Application Cluster (RAC).
  • Associated with DBAs for installation of Oracle database (RAC) on Linux servers & for tuning, backup and restore
  • Configured Multipath for SAN
  • Configured IP Bonding for Failover Load balancing
  • Scripts written in BASH for the Automation of Post-Build Steps and Basic Hardening
  • Perform Datacenter infrastructure maintenance including racking, cabling and troubleshooting.
  • Design and implemented Virtual infrastructure 3 (10 ESX Servers, 50VM’s)
  • Troubleshooting, Patching, Upgrades and Back-ups when required
  • Worked on Data Migration from EMC to Netapp
  • Storage Migration in VMware ESX server using VMotion
  • Prepare a standard RUN BOOK for each migration methodology to be used for migrating all Linux/Unix servers.
  • Check and do the Patch upgrade and Firmware Upgrade for each migration server as and when required.
  • Check and do the HBA driver changes for each migration server as and when required.
  • Installation and configuration of Multipath and removal of Powerpath in all the servers.
  • Copy of data outside the realm of NetApp’s tool copies, i.e. set up any necessary Mirroring. Do any necessary File System copying, assist with any necessary Tape Restores.
  • Ensure that the new devices from Netapp are made online and configured on Linux/Unix file system.
  • Ensure that the data is copied by Netapp team and data is 100% integrity and no slippage.
  • Provide post - data migration support for all incidents related to end user access and directory access privileges until final cutover to sustenance team.

Environment: -Solaris 9, 10, Veritas Volume Manager 4.1, Veritas NetBackup 5.0, IBM WebSphere 6.1, ZFS. Sun Solaris 8/9,Redhat Linux 4/5,AIX 5.3L,Windows,Veritas Volume Manager, Veritas Net backup, Ksh/Perl programming, DNS, NIS, NFS, Apache, Tomcat, Oracle 10g.

Linux Administrator

Confidential, Dallas, Texas

Responsibilities:

  • Monitoring and Resolving problems relating to Internet Servers, Services, Databases, Helpdesk queries (Level 2) and interacting with other Internet nodes to resolve issues regarding Internet services, etc.
  • System & Network Administration of large group of systems & network SUN, Linux, Windows Servers, Modems, Routers and Switches.
  • System Monitoring (Heavy Disk I/Os, CPU Utilization of each server, Load on each server.
  • Share folders and assign permissions to those shares, assigning and managing disk quotas.
  • Setting up and sharing the network printer, planning and scheduling backups.
  • Antivirus installation on servers and nodes. Also includes updating and installing patches on servers
  • Implementing, Managing and Troubleshooting hardware devices and drivers, installing service pack and updating drivers.
  • Monitoring Sendmail, Postfix, NFS, NIS, and DNS Servers.
  • Support company mail infrastructure by maintaining multiple mail servers and assisting users with mail related questions.
  • Maintaining the backup of all the logs of users and mail logs for future correspondence.
  • Installation and preventive maintenance regarding system upgrade and implement diagnostic packages, Networking hardware and installation.
  • Configuring and Administration of users, groups, Creation/Deletion, Monitoring Mail Queues, File systems, network printer & device drivers.
  • Administration, Monitoring, Disk space Management, Ensuring Data security and Access control on Servers
  • Managing user Rights, Maintaining data and access security Assigning mail Quotas, Writing Scripts, LVM, RAID.
  • Occasionally Support for Windows
  • Involved in Formatting raw disks and partitioned them using the format utility, installed Solaris operating system, created file system, devices and special files using newfs and mknod.
  • Used fsck and fsdb on file systems successfully when critical data got corrupted. Made use of alternate superblocks to replace corrupted superblock.
  • Managed Systems and Network related issues like Installation, Configuration and Troubleshooting on Solaris platform.

Environment: Red Hat Linux AS3.0/ AS4.0/ AS 5.0, VERITAS Clusters, VERITAS Volume Manager, VMware, Hitachi Disk Array, Apache 2.0, NFS, Software RAID.

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