We provide IT Staff Augmentation Services!

Linux Systems Administrator Resume

SUMMARY:

  • An accomplished Linux Systems Administrator, with a strong performance background in a wide variety of professional support and solution - based IT services for Linux Systems (or administrating) including, monitoring, configuration, troubleshooting, and maintenance of operating systems. A skilled problem identifier and troubleshooter, who is comfortable managing systems.

PROFESSIONAL EXPERIENCE:

Confidential

Linux Systems Administrator

  • Mainly Responsible for keeping the servers (VM and BM which includes HP and Dell) up and running as well as providing direct user support for any technical issues.
  • Installing, maintaining, and troubleshooting of Linux and Unix Systems
  • Automated installations of operating systems over the network BY PXE Boot for various flavors, such as RHEL, CentOS, Ubuntu, Fedora as well as Server Provisioning by kickstart.
  • Keeping track of system inventory, commissioning and decommissioning servers.
  • Ensuring data destructions before decommissioning.
  • Setting up a secure password less SSH authentication using SSH key pairs
  • Setting up NFS and AUTOFS for home directories in different domains
  • Providing direct user support for level 2 and level 3 issues by email and ticket system
  • Working knowledge in Amazon web services such as EC2, ECS, S3, Elastic Load Balancing, VPC, Route53, Cloud Watch, Cloud Formation, AIM, Elastic Bean stock, and IAM.
  • Experience with writing ansible playbook to automate tasks such as patch systems, install and configure application, add users and run ad-hoc commands.
  • Working with different servers and storages, creating RAID levels (0, 1, 5, 6, and 10) to achieve redundancy and performance.
  • Working with different file systems such as ext3, ext4, XFS and NFS, partitioning using fdisk, parted to create different partitions, creating and fixing file systems.
  • Maintaining the YUM repository server for patch management as well as securing Linux systems by setting up and using local repository and installing, upgrading applications on Linux Systems.
  • Performing daily system monitoring, verifying the integrity and availability of all hardware, server resources, systems and key processes, reviewing system and application logs, and verifying completion of scheduled jobs such as backups.
  • Responsible for backing up all systems using NetBackup 7.5 and restoring files in the event of data loss.
  • Setup cron jobs schedules for various backup and monitoring tasks, supported with enterprise backups using Netbackup
  • Responsible for User management which includes creating, modifying, renewing user accounts and groups on Linux (NIS, Ldap) as well as Active directory.
  • Setting up NIS domains, master server, slave and clients and resolving authentication issues.
  • Mounting user home directories through automount and setting up quota system.
  • Solid understanding and working knowledge of storage technologies such as SAN, NAS and ISCSI
  • Attaching NAS, DAS storage to Linux and ESXI servers, creating standard partitions BY fdisk, gdisk and parted, creating filesystem and mounting across boot time
  • LVM Management, creating physical volumes, volume groups, logical volumes and extending/reducing logical volumes
  • Installing, configuring and managing Linux VMs on VMWare ESXi using VSphere, Vcenter, Vmotion
  • Installation of ESXi Hypervisor Servers, VSphere clients and Vcenter Servers
  • Installing ESXI servers 5.x, 6.x
  • Building Vcenter, Data center, Clusters and adding ESXI servers to it.
  • Creating, moving, and cloning VMs using Vcenter, Vsphere as well as Vmotion.
  • Enabling HA/DRS in Clusters and enabling hot plugs to add cpu and memory on fly.
  • Patched servers using Red Hat Satellite and BladeLogic.
  • Perform software package installation, upgrades and updates using yum and rpm commands
  • Monitoring the infrastructure health using Nagios monitoring tools

Confidential

Linux Technician

  • Installing and configuring servers (DNS, DHCP, NIS, HTTPD) and general-purpose servers using PXE-boot with kickstart
  • Installed different flavors of Linux (RHEL 5/6/7, CentOS 5/6/7 and Ubuntu 12, 14) servers and VMware ESXI 5.5, 6.0 using PXE with kickstart
  • Attaching NAS, DAS storage to Linux and ESXI servers, creating standard partitions BY fdisk, gdisk and partd, creating filesystem and mounting across boot time
  • Installing and configuring Ansible configuration management system and in writing playbooks for Ansible and deploying applications users, patch systems, install vm’s and ad-hoc commands.
  • Managing systems routine backups, scheduling jobs like disabling and enabling cron jobs, enabling system logging, network logging of servers for maintenance, performance tuning, testing.
  • Managing file systems utilization using Du command.
  • Adding users, created groups, added Users to a group as a primary or secondary group, removing Users from a group as well as adding users in sudoers file
  • User management such as creating, modifying and disabling accounts. I set up home directories on servers, added users to appropriate groups and assigned sudo access when requested.
  • Created and managed Logical Volume using LVM to create volumes on the volume groups, and file systems
  • Used vi editor to edit a variety of configuration files
  • Configure NTP client on servers to synchronize time zone with the NTP server
  • Responding to the alerts generated by Nagios such as network connectivity issues, critical system services, application availability, high CPU spikes and systems resources being maxed out. working knowledge on file system and host security using chmod, chown, chgrp, iptables
  • Maintaining of TCP/IP, Apache HTTP/S, SMTP, and DNS applications.
  • Creating/updating iptables rules on Linux systems using host-based firewall
  • Solving issues related to user logon, NFS and server connectivity
  • NFS Administration, exporting file systems, mounting exported file systems, working NFS daemons and fixing any mounting issues
  • Configuring NFS server and mount exported NFS shared at the client side
  • Experience with creating basic bash shell script to automate my daily tasks.
  • Providing support for samba file shares and updating configuration file when necessary
  • Monitoring system processes using top, renice, kill, etc
  • Monitored system logs and activity on all servers
  • Hand on experience resolving systems and process issues reported
  • Working experience on iLO and iDRAC setup and configuration
  • Configuring network adapters for IP addresses and resolving routing related issues
  • Configuring and managing VSFTP servers
  • Ticket assessment/prioritization on daily basis on RT platform
  • Actively monitoring Systems health using Nagios and Solarwinds products and responding to tickets generated by Nagios and users on RT platform
  • Solid 4 years of experience in IT industry including architecting, managing, configuring and maintaining Linux Red HAT and CentOS servers.
  • Strong problem solving approach, monitoring and 24/7 production support in mission critical environments.
  • Expertise in Installation, Configuration, Integration, Tuning, Backup, Upgrades, Patching, Monitoring System Performance, System and Troubleshooting of Linux Servers.
  • Experience in virtualization specifically VMware ESXI 5.x Installation & Configuration.
  • Experienced with the installation and configuration on Apache 2.x,
  • Troubleshooting in Performance Monitoring of CPU, Memory, Disks, Network using various monitoring tools like Nagios XI.
  • Expert level skill sets in different flavors of Linux Red Hat 5/6/7, CentOS 5/6/7 as well as Ubuntu and Fedora.
  • Managing bare metal servers (HP, DELL) servers as well as Virtual servers (VMWare and KVM).
  • Technical support, testing, troubleshooting and configuration of naming services like NIS, DNS etc. on Linux
  • Experience in Designing, Installing and Implementing Ansible configuration management system and in writing playbooks for Ansible and deploying applications.
  • Hands-on experience on Ansible as Configuration management tool, to automate repetitive tasks, quickly deploys critical applications, and proactively manages change.
  • Experience in Installation & Configuration of Network Print Servers on Red Hat Linux.
  • Experience in setting up a PXE boot environment with Red Hat Linux.
  • Installed and configured various LINUX Operating Systems (CentOS 6x, SUSE, Ubuntu, Red Hat) as well as Microsoft Operating Systems (Windows 7, 8, XP, Vista, Server 2008 R2).
  • Experienced with installation of packages, patches, maintenance & RPM updates on Red Hat Linux.
  • Extensive hands-on experience in Logical Volume Manager (LVM), OS Upgrades.
  • Configured services like DNS, NIS, NFS, LDAP, Send Mail, FTP, Remote access on Red Hat Linux.
  • Server building and configuring expert using automation tools on VMWare as well as PXE-boot (Kick start).
  • Experience in computer system maintenance, systems security, software upgrade and network administration of servers running Linux (Red hat Linux 6, 6.X, 7.X)
  • A good team player with strong communication skills and an inquisitive mind to learn more.
  • Ability to manage and prioritize multiple related projects, including troubleshooting, operations, and maintenance of the enterprise in a team environment

Hire Now