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Linux System Administrator Resume

Columbia, MO

SUMMARY:

  • 3+ years of IT industry experience in System administration and production support of various applications on Red Hat Linux 5/6/7, Solaris 8/9/10, Standalone, clustered, and VmWare.
  • Worked extensively in package management using YUM, and Red Hat RPM used in several Linux and Unix distributions such as Red Hat Enterprise Linux and Sun Solaris environment.
  • Linux system Administration skills in Red Hat Linux, Sun Solaris & VMware ESXi.
  • Installation, configuration & administration of Red Hat Enterprise Linux 5x, 6x, administrated server consolidation program through use of VMware Virtual Center.
  • Experience in working with Virtualization Technologies like VMware in building and configuring Linux, Solaris servers as a part of cost effective solutions.
  • Network, DNS configuration and file systems creation and maintenance.
  • Expertise in Networking concepts (VLAN, Routing, Firewalls, Sub netting).
  • Experience in installing, configuring, supporting and troubleshooting UNIX/Linux Networking services and protocols like NIS, NIS+, LDAP, DNS, NFS, DHCP, NAS, FTP, SSH, and SAMBA.
  • Troubleshooting NFS servers, NFS clients in Auto Mounts Environment.
  • Participated in scheduled Disaster Recovery test and Power Down Test.
  • Experience in User & Security administration, multiple backup & recovery technologies (Snapshots, Disaster Recovery plan) and maintenance of various activities.
  • Experience working with Red Hat Satellite Server for upgrading and patching Linux Servers.
  • Installing, configuring and maintaining Web logic Server, WebSphere Application Server, Apache, Tomcat web servers on UNIX.
  • Expertise in Disk Management tools like Disk suite, SVM, LVM, VxVM.
  • Worked on network connectivity, creating LVM and taking backups.
  • Proficient in IBM - Tivoli Storage Manager for system backup, recovery, restoring and troubleshooting.
  • Implementation of High availability solutions using VERITAS cluster server 5,6 and SUN cluster server 3.2, Red Hat clustering.
  • Experience in Performance Monitoring of CPU, Memory, Disks, Network using various monitoring tools like Nagios, BMC for UNIX.
  • Good understanding of OSI Model, TCP/IP protocol suite (IP, TCP, UDP, FTP, TFTP).
  • Experience in troubleshooting and solving the issues of different OSI layers.
  • Configured Networking Concepts DNS, NIS, NFS and DHCP, troubleshooting network problems such as TCP/IP, providing support for users in solving their problems.
  • Amazon Web Services (AWS) has provided companies of all sizes with an infrastructure web services platform in the cloud.
  • Having knowledge on DevOps with Puppet, Chef, Jenkins, GitHub, CI and CD.
  • Experienced in writing Perl and shell scripts for compilation and deployment process.
  • Created Jenkins jobs to automatically spin-up Amazon EC2 and Rackspace instances.
  • Automated adding servers to load-balancers on Amazon ELB and Rackspace using Python scripts.
  • Supported proactive maintenance on systems by timely upgrading Patches to the systems and applications, Scheduling batch jobs and corn jobs.
  • Performed and monitored daily tasks such as backups, failed logins, error report checks/required troubleshooting etcetera.
  • Manage ticket queue by assigning and distributing among the team members and working with clients directly for resolving the issue.
  • Good presentation, customer support and trouble shooting skills & experience in providing 24x7 supports.
  • Experience with working in Production, Development and Testing environment.
  • Ability to work as an individual and as a team member.
  • Excellent communication, mentoring, written and problem-solving skills.
  • Creating and updating the documentation for future reference.

TECHNICAL SKILLS:

Operating System: Red Hat Linux 5.x, 6.x, 7.x, SUSE Linux 10.x,11.x, 12.x, Solaris 10, 9,8 HP (11.0, 11.11, 11.23 and 11.31), VMware (ESX Server, Workstation).

Hardware: Sun Fire V280, V480, V880, V6800 SUN Blade 6000. Sun Ultra Enterprise Servers (E10K, E25K, E3500, E4500, E450, E420R, E250), Dell Power edge 1650, 2850, 2950, 6400, IBM RS6000

Backup/Monitoring Tools: BMC Remedy ticketing tool, TSM v5.3, v5.4, cpio, tar, SMIT, WSM, SAR, topas, tcpdump, Windows NTBackup/restore, Nagios, AppDynamics, CitrixApp.

Clustering Solutions: Veritas Cluster Server, Red hat Cluster Server 6.x, HP Service Guard, and Oracle RAC.

Storage & Networking: Veritas Volume Manager, AIX/Linux Logical Volume Manager, IBM SAN, EMC powerpath, Naviagent, NAVICLI, Cisco Router, Cisco Catalyst Switch, TCP/IP, NIM, NFS, NIS, DNS

PROFESSIONAL EXPERIENCE:

Confidential, Columbia, MO

Linux System Administrator

Responsibilities:

  • Installation, configuration and upgrade of RHEL 5/6/7, AIX, HP-UX, Solaris and Windows operating systems in physical and virtual environment.
  • Automated installation of Linux servers using Kick start and Installation of Solaris using Flash, live upgrades and Jumpstart Servers.
  • Creating and managing file systems, Creating and managing Logical volumes in Linux and VERITAS Volume manager in Solaris & Linux.
  • Installation of patches and packages using RPM and YUM in Red hat Linux and suse Linux and using patchadd and pkgadd in Solaris 10 Operating System.
  • Usage of Service Management Facility for enabling, disabling and troubleshooting services in maintenance mode.
  • Experience with handling of resource groups and service groups in the cluster environment.
  • Installation, Configuration and Administration of High Availability using Redhat cluster and Veritas Cluster Servers for failover and redundancy purpose.
  • Implemented in Red Hat Cluster Suite and Global File system, Red Hat Network Satellite Server.
  • Experience with configuring and Installing Zones for running applications in different zones in Solaris 10.
  • Installation, configuration and Operating System upgrade on Sun Solaris 8,9,10, on sun Servers.
  • Configuration of Clusters using VERITAS &Redhat Cluster Services in Solaris and Linux.
  • Expertise in monitoring servers using Nagios monitoring tool and troubleshoot the servers if necessary and solve the issues.
  • Implementing and controlling the flow of data to and from AWS.
  • Migrating an existing on-premises application to AWS.
  • Backups of systems and restoration using Net Backup on both Solaris and Linux.
  • Creating Disk Volumes, Install and Configure RAID controllers RAID 0, RAID 1 and RAID 5.
  • Expert in generating public and private keys of ssh.
  • Create/extend LVM and non LVM partitions and RAID groups.
  • Experience in using Perl, shell and python scripting for creating users, changing permissions and monitoring server security.
  • Troubleshooting and administering High Availability using VERITAS Cluster Server and Redhat cluster on various business critical database & application production servers.
  • Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.
  • Managed file permissions & ownership for important directories & files.
  • Setup and configure failover load balancing using IP bonding for network cards.
  • Adding of new Luns to the servers and configured them for the creation of file systems.
  • Configured Network teaming and Network bonding in Linux and Solaris servers.
  • Developed automated processes that run daily to check disk usage and perform clean-up of file systems on UNIX environments using shell scripting and CRON.
  • Manage ticket queue by assigning and distributing among the team members and working with clients directly for resolving the issue.
  • Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
  • Configured the systems for TCP/IP Networking with the existing LAN, Setting up SSH and SCP.
  • Configuring, troubleshooting, YUM repository Server and Client.
  • Responsible for monitoring and working on problem tickets. Following it up with business and technical teams, and ensuring the problem is successfully resolved.
  • Daily Linux sever monitoring eg. check disk space, storage space, processes.
  • As Unix/Linux systems administrator configuring, monitoring, upgrading and maintaining systems hardware, software and related infrastructure.
  • Worked on Firewall implementation & Load balance between various Linux servers.

Confidential, Atlanta, GA

Linux/Solaris Administrator

Responsibilities:

  • Installation, configuration and Administration of Red Hat Enterprise Linux 4x, 5x, 6x and Solaris 9.x, 10.x, 11.x.
  • Applied appropriate support packages/patches to maintain system integrity.
  • Managed services supporting clients running Redhat/Centos 5/6/7, SuSe, Ubuntu Linux.
  • Excelled on Linux kernel, memory upgrades, and swap area. Red hat Linux Kickstart Installation.
  • Configuring DNS, DHCP, NIS, NFS in Red hat Linux other Network Services.
  • Installation, configuration and Operating System upgrade on Sun Solaris 8, 9, 10, onsun Servers.
  • Experience in Servers consolidation and virtualization using VMwarevirtual infrastructure, VMwareESX.
  • Created and configured VMware 5 virtual clients.
  • Patched the Solaris 10,11 and Redhat Linux 5, 6 boxes at the latest patch cluster and patched the local zones using parallel patching.
  • Good knowledge on SAN Integration withVMwareESX server.
  • Wrote Shell Scripts as cron jobs and deployment scripts for various reasons.
  • Configured and implemented Redhat Clusters, VERITAS clusters and Sun Clusters.
  • Automated server building using System Imager, Kick start and Jumpstart.
  • Configured the yum repositories for installing and updating the packages on the Red Hat Linux.
  • Create/extend LVM and non LVM partitions and RAID groups.
  • Configured the Raid disks from the bios for creating the File systems.
  • Network monitoring using NAGIOS, Introscope & Splunk tools.
  • Network trouble shooting using ‘ndd’, 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc.
  • Install, configure, and manage Red Hat Enterprise Linux OpenStack Platform networking service.
  • Production support of Apache and JBoss including installation, configuration, management and troubleshooting.
  • Managed file permissions & ownership for important directories & files.
  • Setup and configure failover load balancing using IP bonding for network cards.
  • Adding of new Luns to the servers and configured them for the creation of file systems.
  • Configured Network teaming and Network bonding in Linux and Solaris servers.

Confidential

System Administrator

Responsibilities:

  • Worked on Operating Systems: Solaris 8, Red Hat Linux 5.
  • Installing, Configuring and Managing Linux and Solaris Servers.
  • Resolving day to day end user issues using ticketing tool Remedy.
  • Monitoring day-to-day system performance including memory disk space, alerts and other system resources.
  • Experienced in basic level system administration support to the client in production environment.
  • Creating incidents, changes and assigning to the concern teams.
  • Creating System Disk Partition, Mirroring root disk drive using VERITAS Volume Manager.
  • Installing and Configuring of Apache MySQL and managing web hosting including name-based.
  • Create, Change and delete user accounts per request as necessary.
  • Administrations of Users and Groups. Linux Package management tools (rpm, yum etc.) Scheduling jobs using Crontab.
  • Worked as a part of server build team.
  • Experienced in network configuration file system creating.
  • Creating and resting user passwords, updating user password aging parameters.
  • Installation, Configuration and Troubleshooting of SSH, FTP, NFS, SAMBA and APACHE Server.
  • Daily Linux sever monitoring checking disk space, storage space, processes etc.
  • As Unix/Linux systems administrator configuring, monitoring, upgrading and maintaining systems hardware, software and related infrastructure.
  • Strong analytical skills, able to work with technicians from various engineering disciplines to troubleshoot complex system-level issues.
  • Experience providing Unix support to maintain systems in world-class production data centers.

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