Sr Systems Administrator Resume
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Chicago, IL
SUMMARY
- 8+ of extensive experience in Unix/Linux systems as a System Administrator on versions of RHEL 4/5/6/7, SUSE, CentOS and AIX 5.2/5.3/6.1/7.1
- Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
- Experience in System Administration Driver Configuration.
- Experience in Virtualization Technology such as VMware, Virtual box and ESxi
- Experience in working with Storage Area Network (SAN), EMC Clariion CX, EMC Symmetrix DMX, EMC MirrorView, HP Storage, and Hitachi data storage
- Experience in installation and configuration of Hadoop cluster
- Used cloud server instances and storage from Amazon AWS, Rackspace Cloud, and Linode, to enable client web applications to scale horizontally and vertically
- Expert in load balancing techniques, puppet management and automating builds using Puppet.
- Experience in creating Puppet manifests and software patch installation.
- Wrote puppet manifests for deploying, configuring, and managing collectd for metric collection and monitoring.
- Build automatic provisioning system with kickstart and Puppet.
- Developed Puppet modules to automate deployment, configuration, and lifecycle management of key clusters.
- Automated system configuration using Puppet.
- Excellent in Configuring and Administering NFS, SMTP, DHCP, samba in heterogeneous environment.
- Supporting Level2 and Level 3 for Datacenters contains 3000 + servers.
- Coordinating with Vendor Support engineers to resolve high priority issues..
- Setup and configure LDAP servers for home directory location and authentication.
- Experience in networking (TCP/IP, Ethernet), NIS, DNS, NFS, DHCP, SMTP and RAID.
- Resolving all software application problems in the production, test, and development environments.
- Experienced with installation of packages, patches, maintenance & RPM updates on Red Hat Linux.
- Extensively worked on Logical Volume Management (LVM) and disk space allocation per user (Quotas).
- Proficient in Storage, Disk Management, Logical Volume Management (LVM) on P - series systems Precisely P770, P750, P720, P690, P650, P595, P570 and P520.
- Configured services like DNS, NIS, NFS, LDAP, Send Mail, FTP, Remote access on Red Hat Linux.
- Knowledge of Switches, Routers and Firewalls in Networking Area.
- Custom build of Windows 2003 and Windows 2008 servers which includes adding users, SAN, network configuration, installing application related packages, and managing services
- Strong analytical skills in both the technical and business arenas.
- Quick learner, excellent problem solving skills, highly motivated and adaptable.
- Strong Analytic ability and Capable of working in a large project Team.
- Experience working with various tools such as top, nmon, vmstat, iostat, netstat, tcpdump etc
- Provided production support in an on-call rotation in a 24x7 environment.
- Extensively worked on Logical Volume Management (LVM) and disk space allocation per user (Quotas).
- Proficient in Storage, Disk Management, Logical Volume Management (LVM) on P-series systems Precisely P770, P750, P720, P690, P650, P595, P570 and P520.
- Configured services like DNS, NIS, NFS, LDAP, Send Mail, FTP, Remote access on Red Hat Linux.
- Knowledge of Switches, Routers and Firewalls in Networking Area.
TECHNICAL SKILLS
Operating Systems: RHEL 4/5/6/7, Suse, Windows 2000/2003, Sun Solaris, IBM AIX 7.1, 6.1, 5.3
Hardware: IBM X Series, Dell, Fujitsu, IBM P Series.
Web/Application Servers: WebSphere Application Server 5.0/6.0,WebLogic Server, IBM HTTP Server, Java Script, JSP, Servlets, EJB
Databases: IBM DB2, Oracle 9i/10
Networking: TCP/IP, NIS, NFS, DNS, DHCP, SMTP, POP3, VPN, IMAP, SAN, NAS Cisco Routers/Switches, LAN.
Programming: C, C++, VB, HTML, Shell programming
PROFESSIONAL EXPERIENCE
Confidential, Chicago, IL
Sr Systems Administrator
Responsibilities:
- Administration of RHEL 5/6 which includes installation, configuration, testing on both physical and virtual machines.
- Monitored Linux servers for CPU Utilization, Memory Utilization, and Disk Utilization for performance issues.
- Developed puppet recipes for automation of Hadoop Installation and configuration of nodes.
- Wrote Puppet Manifest files to deploy automated tasks to many servers at once
- Deployed Puppet for automated management of machine configurations.
- Managed Puppet infrastructure through major version upgrades.
- Refactored Puppet code to leverage new features.
- Deployed Puppet for configuration management to existing infrastructure.
- Maintained Puppet-based configuration management in operational and production environments
- Capturing the image of production server, Configuring RAID and build the new server using the image on system imager server with PXE boot.
- Updating YUM Repository and Redhat Package Manager (RPM).
- Performing software installations using yum and RPM.
- Installed and configured Veritas, Volume Manager Server to improve levels of centralization, control, automation, network manageability and protect data loss.
- Created disk groups, volumes, volume groups, and RAIDs using Veritas Volume Manager
- Administration and maintaining of Veritas Cluster Server
- Create and maintain Datacenter, Cluster, Storage Domains using RHEV-M and Vsphere
- Setting up cron schedules for backups and monitoring processes.
- Installation and configuration of Redhat Device Multipathing.
- Installation, Maintenance, Administration and troubleshooting of Linux and AIX.
- Installed the Operating System on Linux servers and Blades over the network.
- Built servers according to standards specified as per individual applications
- Built virtualized Linux servers on ESX and Blade servers to host multiple applications on same chassis across different server hosts
- Set up Linux servers for iSCSI LUN boot instead of using local hard disks
- Created File systems from local storage as well as NFS partitions for application portability.
- Build LPAR system and Installed AIX 5.3 and 6.1 on LPAR using NIM Power 4, 5 and 6 systems and Upgraded Maintenance level as well.
- Installed and verified that all AIX/Linux patches or updates are applied to the servers.
- Used Korn Shell, Bash for scripting
- Migrating the application from WebSphere to Jboss
- Managing systems routine backup, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
- Worked and performed data-center operations including rack mounting, cabling.
- Installed, configured, and maintained WebLogic 10.x and Oracle 10g on AIX & Redhat Linux.
- Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
- Installing and configuring Apache and Tomcat and supporting them on Linux production servers.
- Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
- Preparing servers for Oracle RAC installation which includes tuning the kernel, agent installation, adding NAS storage.
- Worked on resolving production issues and documenting Root Cause Analysis.
- Monitored server and application performance & tuning via various stat commands top, vmstat, nfsstat, iostat, tuned I/O, memory, etc.
- Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM)
Confidential, Chicago, IL
UNIX Systems Administrator
Responsibilities:
- Installation, Configuration, Maintenance and Administration of Red Hat Enterprise Linux 4/5/6 and Suse Enterprise Linux.
- Knowledge of system security, system integration principles and technologies of multiple operating systems.
- Gathering & Understanding the functional specification from the functional document.
- Administrated DHCP, DNS and Samba services in Linux System.
- Troubleshooting Day - to-Day issues with various Servers on different platforms.
- Configuring Backup solutions on SAN/NAS storage.
- Configuration, Administration and Maintenance of NFS, DNS, NIS & NIS+ on Linux Servers.
- Installation, configuration, and administration of VMware, Solaris Zones, Containers, and Ldoms
- Responsible for Patches for the operating system, building startup shell scripts, managing the automation of Cron jobs and managing file systems.
- File system Administration, Setting up Disk Quota.
- Implementing & troubleshooting NFS in Prod/ QA/ Dev environment.
- Setup virtual host for new application setup and creating documents.
- Working on evaluating new hardware and software.
- Installed/setup and maintained Splunk app for various platform of Operating system.
- Experience in System Administration Driver Configuration.
- Familiarity with message brokers such as ActiveMQ and/or RabbitMQ.
- Understanding of common data structures (arrays, hash tables, trees, linked lists).
- Hashing and cryptographic techniques.
- Configuring different systems such as: Oracle ASM (RAC), VCS and CFS, and middleware applications.
- Provide remote support for Linux servers and maintaining SLAs, Performance tuning and enhancing.
- Production Support for 600+Linux Servers
- Customizing the applications according to the business requirements.
- Involved in troubleshooting the performance issues related to web application running on virtual machines
- Responsible for Connectivity Issues among various Servers and Switches and also responsible for installation of various hardware components on various servers.
- Work with Onsite and Offshore development teams for application development and delivery.
- Provide management reporting on daily/weekly/monthly basis.
Confidential, Dublin, OH
Unix Systems Administrator
Responsibilities:
- Installation, Configuration, Upgrade and administration of AIX, RedHat Linux.
- User account management and support.
- Responsible for configuring and managing Level1/Level 2 issues on Unix servers and escalate to Level 3 team when needed.
- Configuration and Administration of NIS environment.
- Involved in Installing and configuring of NFS.
- Installed, configured and managed VMware infrastructure (ESXI, Virtual Center)
- Responsible for reviewing all open tickets, resolve and close any existing tickets.
- Document solutions for any issues that have not been discovered previously
- Ensure safe and secure backup and storage of organizational data and all the servers.
- Evaluate IT equipment and plan for future hardware needs & software needs.
- Ensure safe and secure backup and storage of organizational data.
- Troubleshooting network problems such as routing, repairing systems in case of crash.
- Installation of Technology levels/patches, APARs on AIX.
- Performed routine checks on nodes by monitoring syslogs and error logs for system and hardware errors.
- Managed mksysb backups, worked with backup team on data migration and disaster recovery related issues.
- Configured SSH, Managed Logical volumes, file systems, paging space issues.
- Monitored trouble ticket queue to attend user and system calls.