System Administrator Linux

Francis Antwi-Boateng

ad20qm@r.postjobfree.com, 305 Barnwell Dr., Stafford VA,2254

Cell: 571-***-****

PROFESSIONAL PROFILE

Well experienced Linux System Administrator with a strong background in Installation of RHEL, Upgrading, Configuration of Servers - NFS, DNS, LDAP and HTTP, remote trouble shooting, Management of RHEL, performance analysis and monitoring of Linux systems. Proven to be an enthusiastic, dependable team player, problem solver, and teachable employee to lead or follow. Works well under pressure, learns new concepts easily and is passionate about solving business needs with technological solution.

SUMMARY OF QUALIFICATIONS

Over 5 years Knowledge of installation, configuration and management of RHEL /6/7/8 and Cent OS

Experience in configuring and administering NFS, DNS, VSFTP, LDAP, and HTTP on Linux environment.

Extensive experience in Kerberos, KCL and RHEL

Extensive knowledge in creating users and groups with advance permissions and managing quotas.

Knowledgeable in hardware and software installations, upgrades, and maintenance, patch administration, kernel modification/upgrades using rpm and yum.

Extensive knowledge in file system management, monitoring CPU, memory, disk space, standard partitioning logical volume manager, VDO, and performance capacity analysis

Experience in managing Windows servers.

Experience with KDC and Identity Management

Experience in ticketing with ServiceNow,

Experience in firewall configuration and installation

Knowledge in trouble shooting Linux Servers, resolving boot issues and maintenance of server issues using rescue mode and single user mode.

Knowledge in Linux Shell scripting

Experience in automation and scheduling jobs, scripts and administering task using cron

Experience in native RHEL system back up and data archiving tools

Experience in administering VMware Infrastructure Client, Webclient and Vsphere 6.7

Experience in supporting software developers and Database Administrators in large enterprise environments.

Server Virtualization – (ie. vmware - bonus Oracle Virtual Server or Linux KVM/oVirt)

Security

SAN: NFS, snapshots

Network – VLAN’s, complex configurations, troubleshooting.

Edge - Firewall, WAN Optimizer and Load Balancer

Audit Vault and Oracle DB and Clustering

EDUCATION

Bachelor of Science, Kwame Nkrumah University of Science and Technology, Ghana

TECHNICAL SKILLS/PROFESSIONAL DEVELOPMENT

Operating System: RHEL 7/8 and CentOS 5.x/6.x/7.x

Hardware: HP Proliant, Dell R Series Servers, SCSI

Software: Nagios XI, Chef, Microsoft Office, Apache, LDAP

Network Protocols: DNS, Nslookup, Netstat, TCP, IP, UDP, FTP, HTTP

Visualization: VMWare, Hardware Manager console

Web Application: Tomcat, Apache

Training : Linux System Administration, Customer Service Support, Troubleshooting

PROFESSIONAL EXPERIENCE

Linux System Administrator, August 2021- Present

B & C Tech Consult, Baltimore, Maryland

Install, configure, maintain and administer Linux System using Kickstart and interactive installation on many servers.

Create and configure file systems and file system attributes such as permissions, encryption, access control lists and network file systems

Manage users and groups, including use of a centralized directory for authentication.

Manage security, including firewall and SELinux configuration.

Set kernel runtime parameters.

Produce and deliver reports on system utilization.

Deploy, configure, and maintain systems, including software installation, update, and core services.

Operate running systems, including booting into different run levels, identifying processes, starting and stopping virtual machines and controlling services.

Configure local storage using partitions and local volumes.

Install hardware, software and monitor application performance and availability.

Perform a variety of maintenance and end-user support to ensure that all workstations, servers and Logical Volume, Physical Volume, Volume Groups and Resizing

Support user management, create user and group accounts, profiles, configure appropriate access for overall network performance meet the State’s standards and requirements.

Administer and configure Logical Volume Manager which involves creating and modifying File Systems, users and groups, and manage quotas.

Configure and Administer NFS, LDAP, HTTPD, and DNS on Linux server environment.

Perform daily backup operations, ensuring all required files systems and system data are successfully backup to appropriate media, disk and recovery tapes.

Administration and monitoring infrastructure consisting of Nagios server as web interface for configuration and display of performance data.

Assist in developing strategic technical documentation and written communication relative to IT and State policies and procedures

Plan new hardware acquisitions, interact with vendors, educate customers and collaborate with others on working on projects

Work with engineers to help them use work stations and and servers to solve computationally intensive problems and trouble shooting

Monitor Service Desk tickets from queue providing assistance and customer maintenance and testing with ServiceNow

Install, configure, and update software and hardware on servers and network devices, using tools such as Chef, CFEngine and Kickstart

Monitor and troubleshoot system performance and availability issues using tools such as Nagios, Zabbix, and Splunk

Implement and enforce security policies and best practices for IT systems and networks using tools such as iptables, SELinux, and PKI

Perform backup and recovery of IT systems and data using tools such as rsync, tar

Manage and support virtualization technologies, such as OpenStack, VMware, or Azure

Monitoring alerts constantly to ensure effective management and task execution with Elastalerts

Monitoring logs and data with Elastic Search

Hands on Experience in tracing data collection, log file analysis for network, application, middleware and troubleshooting general problems.

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.

Install and configure firewall.

Install and configure Nagios to monitor network bandwidth, memory usage and hard drive status.

Compressing files and folders for backup

Manual update with Yum and automated configuration and server updates.

Analyze, design, and implement modifications to system software to improve and enhance system performance by correcting errors.

Troubleshoot boot issues and maintenance of server issues using rescue mode and single user mode.

Configuring system logging, including remote logging

Extensive experience in ansible to engineer infrastructure automation that eliminate time consuming manual processes, development and configuration

Create python flask inventory application to keep track of compute nodes and hardware.

Linux System Administrator January 2017– July 2021

T.R. Klein and Company, LLC, Baltimore, Maryland

Installed new physical and virtual servers using VMware Virtual Center and configure hardware, settings, directories, storage in accordance with standards and project/operational requirement

Designed firewall rules for new servers, deploy patches associated with Linux Operating System and hardening the system to ensure a consistent secure platform

Administered and configured DNS, NFS, FTP, APACHE and LDAP on newly installed servers

Automated and scheduled jobs, scripts and administer task using Cron, and enable system network logging for maintenance and testing

Performed RPM and Yum package installation

Installed and configured Logical Volume Manager, perform hard disk and storage allocation and management

Monitored and evaluated logs and data with Prometheus and Log Stash

Created user and group accounts, network configuration, manage password and permissions and administer quotas

Performed daily system monitoring, verifying the integrity and availability of all hardware, server resources, system processes, viewing system and application logs and verify completion of scheduled jobs

Ensured proper recording, documentation and closure of tickets

Document and update all customer correspondence relevant to internal information via ticketing system

Provided first level contact, troubleshoot application issues on the platform and convey resolutions to customer issues

Provided telephone and in-person support to end users for network and application issues

Ensured resource optimization regarding memory CPU and disks

Ticketing system- jira, Service now,Remedy

Collaborated with Datebase administrators for turning and preparing Linux Kernel for installations

Provided professional support for development and production servers

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