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Unix System Administrator Resume

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Mount Laurel, NJ

SUMMARY

  • 8 Years of Experience in UNIX/LINUX Systems and Network administration for Sun Solaris 9, 10, Linux RedHat (RHEL 4, 5, 6), CentOS, SUSE, Debian, OEL & HP - UX 10.x, 11.x.
  • Experience in installation, configuration file system management through Logical Volume Manager (LVM), VERITAS Volume Manager (VxVM), Solaris Volume Manager (SVM).
  • Configuring and maintaining virtual server environment using VMWARE ESX/GSX, VSphere, VCenter.
  • Volume and Filesystem management using Veritas Volume Manager (VxVM) and Veritas Filesystem (Veritas Storage Foundation).
  • Clustering solutions for High Availability using tools such as Veritas Cluster Server (VCS), RedHat HA (RHCS), and MSCS.
  • Good knowledge of RAID groups and setting up NFS, CIFS and iSCSI protocols in SAN/NAS environment on HPUX 11.23/11.31 and Redhat LINUX.
  • Experienced in system administration, System planning and design, co-ordination and communicate at group level and user level.
  • Configuration, implementation, troubleshooting and administration of NFS, NIS, DNS, and LDAP on Solaris and Linux environment.
  • Installation, Configuration and Maintenance of Samba, Apache Tomcat, Web Sphere and Linux environment.
  • Experience in Patch management, Disk management, Security, troubleshooting, Disaster Recovery and Planning.
  • Experience in SAN and VERITAS NetBackup administration.
  • Performing regular day-to-day Systems Administration activities such as User Administrations, Disk Management, Package Install, Patch Management, Storage Management, Performance Monitoring; Log files Monitoring, Jobs Scheduling, NFS Administration and Disaster Recovery/fail-over exercises.
  • Proficient in Shell Scripting (Bash), Sed & Awk.
  • Ability to plan, schedule and execute projects on time.

TECHNICAL SKILLS

Operating Systems: Linux (Red hat - RHEL 3/4/5/6), Fedora Core 17.x/16.x, Ubuntu 12.x/13.x, HP-UX, Solaris, Windows 03/00/NT4.0.

Hardware: HP DL380 G5/G6/G7/Gen8, Dell Poweredge 1950, 2300, 2450, R810. IBM RS/6000, IBM Blade center, JS20, JS21, HS20, pSeries 570, 590, 595, 650, 630, 670, 780, 770, 750, 740, 730 SUN Enterprise 450.

Web Servers: Apache (httpd), apache-tomcat, jboss, weblogic. Tomcat, Apache, WebSphere, Apache Http Server, IIS 4.0/5.0, MQ Series.

Languages: C, Clearcase, Shell scripting Ksh & Bourn Shell, JavaScript, HTML, JAVA, C, C++, Korn Shell programming, PL/SQL

Databases: Oracle 8i/9i/10g, DB2, MS SQL SERVER 7.0/2000, SyBase.

Networking: NIS, NFS, AutoFS, DNS. TCP/IP, DNS, DHCP, Cisco Routers/Switches, and LA

Other Skills: VMware, VCenter Server, VMware Server, Xen, Solaris Zones. LPAR, NIM, TSM IBM tape libraries.

PROFESSIONAL EXPERIENCE

Confidential, Mount Laurel, NJ

Unix System Administrator

Responsibilities:

  • Worked as Linux Administrator Supporting the Server farm in 24X7 Production Environment.
  • Supported Red Hat Linux (RHEL 5.7, 5.8 and 6.4)
  • Installation/Administration of RHEL 5.7 5.8 and 6.4 on Multiple Servers (configuration, testing on both physical and virtual machines).
  • Install and configure various services like DHCP, NFS, DNS, Apache Web Server, NIS, LDAP, Samba, SSH, FTP/SFTP, Sendmail/SMTP, Telnet, RPM Package Management, File System Management.
  • Developed Shell Scripts for automation of daily tasks.
  • Develop Linux shell scripts to accomplish redundant tasks to simplify in distributed administration.
  • Worked on Security/Authorizations; Created users with limited and full root privileges. Create and manage sudoers.
  • Perform day to day Linux administration such as user accounts, logon scripts, directory services, file system shares, permissions. Support Oracle database.
  • Setup NFS and Samba File sharing on Linux and Windows servers.
  • Develop and maintain the documents, library and procedural documents of the system.
  • Utilized Remedy for data center service requests (Network requests for IP’s, ILO’s, and DNS changes).
  • Acquired comprehensive requirements from Project Managers, Team Leads pertaining to the servers to be migrated.
  • Responsible for resolving network issues using network tools like ping, tcptraceroute, traceroute, tcpdump.
  • Performing change management as per company standards in accordance with the hardware provider.
  • Horizontal and Vertical Clustering. Setup Node Managers and Admin Servers.Attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.
  • Setting up cron schedules for backups and monitoring processes.
  • Automated server building using System Imager, PXE, Kickstart and Jumpstart, for Solaris and RHEL Servers.
  • Upgrades, installs, configuration and administration security and monitoring tools on Linux.
  • Excellent in patches and packages installation on Linux/Unix Environment.
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
  • Experience in Linux kernel configuration.
  • Updating YUM Repository and Redhat Package Manager (RPM).
  • Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.
  • Building Customized Scripts / LVM for the SAN (HOST) based migrations.

Confidential, Irving, TX

Linux System Administrator

Responsibilities:

  • Designed, set up, installed, configured and performed administration of Red Hat Linux servers.
  • Setup automated installs for Linux servers (Redhat, Fedora and Ubuntu) using Kickstart.
  • Used Nagios for Deployment on Server Farm of over 300 Linux Servers and monitoring.
  • Setup NFS and Samba File sharing setup on Linux and Windows servers.
  • Setup and configured Apache in Redhat servers RHEL 5.6/5.5/Ubuntu.
  • Configured virtual switches, network interfaces, port groups, data stores using GUI and CLI.
  • Installed Apache HTTP Server 2.4 and MySQL Database on Linux Boxes.
  • Used VMware P2V to migrate from physical to virtual
  • Worked on Solaris servers supporting all the OS administration, application and hardware issues.
  • Very good working experience on Redhat Satellite Server upgrading and patching.
  • Building Linux servers by using VMware ESX 3.0 and also involved in channels and pushing the packages in Redhat Satellite Server.
  • Implemented upgrade of servers using Redhat Satellite Server.
  • Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using Veritas Cluster Server in SAN environment.
  • Setup NFS file systems and shared them to clients.
  • Troubleshooting and configuring NAS and NFS mount points.
  • Troubleshooting network, application, and server related issues.
  • Scheduling of automatic repetitive Jobs, and Shell Scripts with Crontab.
  • Monitoring Virtual memory, Swap management, and Disk and CPU utilization by using various monitoring tools.
  • Installed, configured and managed VMware infrastructure (ESXi, Virtual center).
  • Perform standard system administration tasks, such as patching, software and hardware upgrades, troubleshooting and problem resolution.
  • Install and configure various services like DHCP, NFS, DNS, Apache Web Server, NIS, LDAP, Samba, SSH, FTP/SFTP, Sendmail/SMTP, Telnet, RPM Package Management, File System Management.
  • Responsible for resolving network issues using network tools like ping, tcptraceroute, traceroute, tcpdump.
  • Develop Linux shell scripts to accomplish redundant tasks to simplify in distributed administration.
  • Create users with limited and full root privileges. Create and manage sudoers.
  • Perform day to day Linux administration such as user accounts, logon scripts, directory services, file system shares, permissions. Support Oracle database.

Confidential, Lakewood, CO

Solaris/Linux System Administrator

Responsibilities:

  • Involved in UNIX/LINUX System and Network administration in Sun Solaris (9/10), HP-UX 11.31, Linux (RedHat 5/6) servers running different Database and Middleware Applications.
  • Storage Provisioning, Volume and Filesystem Management using LVM, Veritas Volume Manager and Veritas Filesystem (Veritas Storage Foundation), Configuring ZFS filesystems.
  • Build two new VMware ESX Server 4.x/5.x on HP HW running Red Hat Enterprise Linux & Created different virtual machine like Debian, windows 2003 & 2008 server, SuSE enterprise Linux using VMware Virtual Infrastructure Client tool and configured with EMC storage box.
  • Supported around 200+ whole root zones running on Solaris 10 environment.
  • Maintained 15 VMware ESX server connected with two EMC VNX SAN box and managed of two Cisco MDS switch using Fabric & Device management tool.
  • Clustering solutions for High Availability using tools such as Veritas Cluster Server (VCS), MSCS, RHCS.
  • Configuring and maintaining virtual server environment using VMWARE ESX, VCenter VSphere, and Solaris 10 Zones.
  • Installation and Configuration of Sun Enterprise Servers, HP and IBM Blade Servers (C6000 & C7000), HP Itanium, Configured Enterprise UNIX/LINUX systems in heterogeneous environment (Linux, Solaris, HP-UX) with SAN/NAS infrastructure across multiple sites on mission business critical systems.
  • Setup, Implementation, Configuration, documentation of Backup/Restore solutions for Disaster/Business Recovery of clients using OMNIBACK on UNIX and LINUX platform.
  • Performed quarterly patching of Linux, Solaris and HPUX servers on regular schedule. Involved in up Network/SAN based ignite images for HPUX PA RISC and integrity servers.
  • Good knowledge of RAID groups and setting up NFS, CIFS and iSCSI protocols in SAN/NAS environment on HPUX 11.31 and Redhat LINUX.
  • Implementation of oracle RAC 10g on HPUX blades and Itanium servers with Redhat linux RHEL 5.x/6.x along with SAN storage on EVAs.
  • Also implemented and support HPUX Service guard on Linux servers.
  • Involved and set up migration for UNIX/Linux server and SAN storage between data centers and also application migration and testing.
  • This included SAN/Application migration and testing various functionalities of key applications.
  • Installing, setup of proliant blade BL,DL series with fiber channel connectivity, Cisco GESM interconnect switch, configuring the connectivity, setting up JBOSS cluster, setting up oracle RAC cluster, configuring load-balancing on apache, on Redhat Linux 5.x Setting up NIS/NFS on RedHat servers.
  • Setting up JBoss cluster and configuring apache with JBoss on RetHat Linux. Proxy serving with Apache. Troubleshooting Apache with JBoss and Mod jk troubleshooting for the clients.
  • Setting up the lab environment with Tomcat/Apache, configuring the setup with F5 virtual load balancer for customer application.

Confidential, Dallas, TX

Solaris/Linux System Administrator

Responsibilities:

  • Installed, upgraded, Mirrored and configured RHEL 4.x and Sun Solaris 10/9.0/8.0 using Kickstart, Jumpstart Installation respectively.
  • Upgraded Solaris 8 to 9 and 9 to 10 on Sun servers and workstations. Added necessary patches using patchadd utility and scripts.
  • Controlled disk operations, disk group operations, volume operations and volume configurations using vxdisk, vxdg, vxassist, vxmake and vxvol in Veritas Volume Manager.
  • Configured Printers, Print Server and Print Clients using commands like lp, lpstat, lpadmin, lpfilter & GUI.
  • Configured and administered Samba to provide file services, resolved various inter-operability issues between Windows NT & Solaris platforms.
  • Installation, Setup and Configuration of WebLogic 9.0/8.1 application server.
  • Deployed Portlets manually using Admin Console.
  • Disk Management using different RIAD technologies in Solaris and Linux using Veritas Volume Manager and LVM.
  • Veritas Cluster Installation and Configuration along with Resources and Service Groups Configuration in VCS.
  • Configuration and administration of DNS, LDAP, NFS, NIS and Samba in RedHat Linux, and Sun Solaris.
  • Network trouble shooting using ndd, traceroute, netstat, ifconfig and snoop.
  • Administered and Managed Network Applications and Services like NFS with Hummingbird connectivity V7.1.
  • Involved in Configuring DHCP server and giving IP addressing dynamically.
  • FTP Server configuration in Linux and done kernel tuning on Linux for play out software.
  • Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software and directories & files using access modes.
  • Written Shell scripts to run Batch Jobs on Sun Solaris and RedHat Linux servers.
  • Provided system performance reporting on a regular basis along with keeping all software at current version levels, and maintaining a log of changes for tracking.

Confidential, Phoenix, NV

Solaris/Linux System Administrator

Responsibilities:

  • Worked on migration Project from Solaris 9, 10 to Redhat EL6x.
  • Configured and Troubleshoot Network Interface NIC on Linux environment.
  • Experience in adding swap and updating under /etc/fstab.
  • Worked on installing and deleting kernel modules.
  • Performed Disk administration using LVM’s and implemented file system expansion.
  • Worked on Disk replacement, Root mirroring in Solaris on HP-UX servers.
  • Performance Analysis of resources like CPU, Memory, Disk and Swap from command line using commands like prstat, vmstat, sar, iostat, swap.
  • Modifying/ Writing scripts in Bash and Korn shell for optimizing day to day administration like (system checkout, monitoring and reporting scripts).
  • Worked on LUN Mapping using multipath on Linux server.
  • Worked on RAID implementation using mdadm utility.
  • Extensively used RPM and YUM.
  • Extensively used svcs commands on Solaris.
  • Extensively used chkconfig in LINUX.
  • Worked with database team and modified Oracle database scripts.
  • Configuring password less login through SSH. Generating key using ssh-keygen.
  • Experienced on Installing, Compiling various source code for the application.
  • Worked on system backups using Rsync.
  • Worked on Job scheduling using CRON.
  • Worked on web/app application like Apache GemPak, LDM for weather applications.
  • Experienced on different monitoring tools HP, AWSTAT.
  • Worked on Change management, ticket SLA’s using Remedy.
  • Worked on Project management using Gantt chart identifying critical path.
  • Have done many root cause analysis with the team and management with BP
  • Have done Documentation on different SOP’s ( Standing operating procedures)
  • Worked with various groups on resolving issues with User management.

Confidential

UNIX/Linux Systems Administrator

Responsibilities:

  • Responsible for day-to-day System Administration for Linux RedHat servers.
  • Build the E450 and 6000 Servers with Solaris operating system.
  • Storage setups, RAID, Logical Volume Manager, system backup design and disaster recovery.
  • Systems performance monitoring.
  • Solaris Operating Systems upgrade, package installations, updates, patches and software fixes.
  • Responsible for troubleshooting end user and application problems.
  • Veritas File system and Veritas Volume Manager.
  • Creating User accounts, Mail account, groups, printer etc.
  • Monitoring system resources, logs, disk usage, scheduling backups and restore.
  • Set up Quotas for the user accounts & limiting the disk space usage.
  • Creation/Configuration of Additional swap/ tmp dynamically as and when required.
  • NFS Management - Take care of user accounts/groups, setting up of NFS Environment.
  • Solving the problems as & when created when NFS data being accessed.
  • Worked closely with database administration staff to ensure optimal performance of databases, and maintain development applications and databases.
  • Assembling the systems and installing operating system and application software.
  • Training for users to use the program.

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