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Linux System Administrator Resume

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SUMMARY

  • Results - oriented Linux System Administrator with 8+ years of experience impacting organizational performance through expert development, enhancement, and administration of complex technical platforms.
  • Skilled problem identifier and troubleshooter and comfortable managing systems, projects and teams in a range of IT environments, works well with team as well as independently.
  • Hard worker with excellent interpersonal and organizational skills.
  • Able to multitask and set priorities to maximize potential.
  • IT professional with extensive experience as a systems administrator.

TECHNICAL SKILLS

Operating System: RHEL / CentOS 5,6,7, Fedora, Ubuntu14 /16, Windows 2012.

Networking: DNS, LDAP, SMTP, IMAP, Postfix, Sendmail, SAMBA, TCP/IP, DHCP, SSH, FTP, LAN/WAN, VLAN.

Server: Apache, Send mail, Nagios, DNS, DHCP, Password server, Samba, SSH, and FTP.

Hardware: IBM System X3250, X3650, X3750, Lenovo Think Servers RD340 RD440, HP-DL380 G5, G6, G7 & Gen8, Dell PowerEdge R620, R630, R730. Storage administration RAID arrays, SAN (HP EVA-NETapp), NAS, NFS.

Database: MySQL, MariaDB, MogoDB

Application and Web Server: Appache (httpd)

Ticketicking systems: Jira, PeopleSoft

PROFESSIONAL EXPERIENCE

LINUX SYSTEM ADMINISTRATOR

Confidential

Responsibilities:

  • Experience in installing, upgrading and configuring Red Hat Linux 5.x,6x,7x using Kickstart
  • Servers and Interactive Installation
  • Administering production Linux and Windows servers, serving 10000 users and the ability to build Linux software packages from source when needed.
  • CentOS, Ubuntu, RedHat and Debian Linux distributions
  • Virtualization (XEN, VMWare)
  • Nagios system monitoring software
  • Server-class PC hardware (HP, Dell, R630.R720,R730)
  • Git, Apache, nginx, postfix, OpenSSH server software and git/Gerrit source code control/review.
  • Write and edit technical documentation on Enterprise Wiki .Create tickets by Atlassian Jira and Peoplesoft application
  • Configured EC2 instances by writing Terraform templates, Ansible Playbooks, and pushed them on to Ansible server
  • Created and modified users and groups with SUDO permission.
  • Responsible for the 24 X 7 data center operations such as rack installation, server configuration, server health monitoring, switches installation.
  • Supported network hardware such as firewalls, switches and storage hardware such as SAN and NAS systems
  • Administered VMware virtual machines, hypervisors and clusters
  • Supported 24/7 high availability production servers.
  • Trouble shooting of day to day system and user problems including resolving issue tickets and documentation of the issues and their fixes
  • Project: Participated in RedHat7 migration project, which included migration of hundreds of servers from RHEL6 to RHEL7. Built and configured VMs needed for this project, created DNS entries and fully participated in migration.

LINUX SYSTEM ADMINISTRATOR

Confidential, Arlington, VA

Responsibilities:

  • Evaluating performance of systems to see that they meet business needs.
  • Designing an Automation Strategy to deploy RHEL Linux server builds from bare metal and in a virtual environment
  • Integrating automation design with Open Puppet, Vmware, PXEboot, TFTP, kickstart, DHCP, NTP configuration.
  • Run, maintained, and setup schedule works (CRONTAB)
  • Test the design in a DEV environment, ensuring the builds are consistent, quick and easy to deploy
  • Presenting hardware proposals to meet current and future requirements
  • Writing Technical Documents on Standard Operating Procedures (naming conventions, best practices, install procedures)
  • Installing, upgrading and maintaining Linux operating systems.
  • Managing, installing patches and other software packages using YUM and RPM.
  • Logical Volume Management (LVM) Administration.
  • User administration.
  • Set up NFS and Samba File sharing on Linux and Windows servers.
  • Managing and monitoring server using Nagios and custom scripts.
  • Performing daily system monitoring, verify the integrity and availability of all hardware and server resources, and review system and application logs.

LINUX SYSTEM ADMINISTRATOR

Confidential, Silver Spring, MD

Responsibilities:

  • Administration of VMware ESX Infrastructure
  • Creation of Linux Virtual Machines on VMware Virtual Center.
  • Experience in installing, upgrading and configuring Red Hat Linux 5.x, 6x
  • Experience in creating and managing users' and groups' accounts, passwords, permissions, disk space allocations and process monitoring in CentOS and Red Hat Linux
  • Configuration of remote access systems through SSH, and managed system security via TCP Wrappers.
  • Installation and management of packages via RPM and YUM package management system.
  • Installation, configuration and support of Apache (HTTP) on Linux production servers.
  • Creation of new disk partitions and File Systems: Swap, ext4, LVM (Physical Volumes, Volume Groups, and Logical Volumes).
  • Management of system logs (rsyslog server), system automated tasks (cron jobs).
  • Implementation of file transfer systems using FTP, NFS, and SSH (SCP).
  • Configuration and Implementation IPtables rules on new servers.
  • Experience in network monitoring and performance management tools.
  • Administration of HTTP, DNS, DHCP, NFS Servers
  • Maintenance of current infrastructure technologies, timing and features of upcoming releases.
  • Operations enhancement by identifying areas to be improved and documenting the environment and processes.
  • Performance of other systems administration duties as project work and operational necessities require.

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