Summary
Overview
Work History
Education
Skills
Websites
Certification
Projects
Timeline
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Ramota Ogunjinmi

Allentown,PA

Summary

Experienced and quality-focused IT professional/engineer with 6 years of hands-on experience in Designing, Configuring and Administering of highly secured and highly efficient Linux infrastructure both in the start-up and enterprise environment. A fast learner and hardworking with a high sense of team spirit.

Overview

6
6
years of professional experience
1
1
Certification

Work History

Linux System Administrator

IntelliSurvey INC
Remote
03.2022 - Current
  • System Installation and configuration: Planning, installation, configuration, management and troubleshooting of Red Hat Enterprise Linux, CentOS and almalinux platform
  • Install and manage virtual Linux machines on KVM and VirtualBox using ansible kickstart
  • Performs Linux server kernel upgrade as required
  • Join servers to forman katello to apply patches and update
  • Perform software/package installation, upgrade and updates using yum/dnf and rpm package managers
  • Set up and maintain user accounts, permissions, and security policies
  • Integrating server with FreeIPA for users’ authorization and authentication
  • Networking: Configure and manage TCP/IP address, network interfaces and routing on Linux servers
  • Troubleshooting and resolving network issue using commands like ping, ifconfig, netstat, tcpdump, and trace route
  • Configure NTP client to synchronize time with the NTP server
  • System Monitoring and performance Tuning: Set up monitoring of system performance on icinga and checkmk monitoring tools
  • Resolve system and process issues reported by icinga and checkmk
  • Troubleshoot and resolve hardware, software and network related issues
  • Monitor and implement system performance tuning as needed
  • Monitored and controlled system processes using top, iotop, iostat, ps, kill and other administrative commands
  • Monitored system logs and activity on all servers
  • Application management: Install and configure apache httpd server for developers to host web applications
  • Install and manage multiple web applications using docker/podman containers
  • Configure web application with nginx and apache http
  • Backup and Recovery: Implement and configure/manage backup recovery process for our servers and critical data
  • Test and verify backup to ensure data integrity
  • Create directory links for users as requested
  • General server Administration task: Perform critical system administration tasks from Single user mode
  • Manage filesystems using LVM
  • Performed file system backups and restores using local archiving utilities to include tar, gzip
  • Configure NFS server and mount exported NFS resources at the client side
  • Configured and managed vsftp servers
  • Schedule and maintain cron jobs
  • Turn-off unused services on systems to strengthen host security
  • Tune Linux kernel using kernel parameters as requested by database administrator
  • Create directory symbolic links for users as requested
  • Sends weekly report to management on overall system performance and health checks
  • Security Management: Disabled direct ssh root login on servers
  • Maintain user-based security via password aging and ssh key rotation
  • Maintain file system and host security using chmod, chown, chgrp, immutable permit, sticky bit iptables and TCP wrappers
  • Configure DNS clients on servers
  • Firewall configuration to control traffic
  • Regular server patches and updates
  • Automation and Scripting: Develop and maintain automation script for repeated tasks
  • Utilize ansible automation tools
  • Set up a CI process to trigger automated builds whenever changes are being added to git repository
  • Manage Jenkins Plugins, updates, and integration with gitea, git
  • Implement continuous integration and continuous deployment (CI/CD) pipeline for efficiency of our software delivery for our saas customers using git repository.

Linux/Unix Systems Administrator

Insight Global/T-mobile
Remote
02.2018 - 03.2022
  • System Installation and configuration: Using template to install virtual machines on VMware
  • Planning, installation, configuration, management and troubleshooting of Red Hat Enterprise Linux 6/7 & 8 platform
  • Install and manage virtual Linux machines on VMware
  • Install and configure VMware esxi-host
  • Managing hosts and clusters on Vcenter
  • Upgrading and applying license to vmware esxi host
  • Upgrading and applying license to vcenter
  • Perform In-place upgrade on rhel 6 & 7 servers
  • Join servers to satellite to apply patches and update
  • Perform software/package installation, upgrade and updates using yum/dnf and rpm package managers
  • Set up and maintain user accounts, permissions, and security policies
  • Integrating server with window’s active directory for users’ authorization and authentication
  • Install and configure log analytic agent for linux on assure portal
  • Networking: Configure and manage TCP/IP address, network interfaces and routing on Linux servers
  • Troubleshooting and resolving network issue using commands like ping, ifconfig, netstat, tcpdump, and trace route
  • Configure NTP client to synchronize time with the NTP server
  • General server Administration task: Perform critical system administration tasks from Single user mode
  • Manage filesystems using LVM
  • Performed file system backups and restores using local archiving utilities to include tar, gzip
  • Configure NFS server and mount exported NFS resources at the client side
  • Configured and managed vsftp servers
  • Schedule and maintain cron jobs
  • Turn-off unused services on systems to strengthen host security
  • Tune Linux kernel using kernel parameters as requested by database administrator
  • Create directory symbolic links for users as requested
  • Sends weekly report to management on overall system performance and health checks
  • Developed functional and technical documentation using Atlassian Confluence
  • Offer various support for other IT teams
  • Cloud Technology: Proficient in configuring and managing AWS services such as EC2, S3, RDS, Lamda function, VPC, IAM, and CloudFront for CDN
  • Strong knowledge of network configuration including TCP/IP, route53, VPN and controlling traffic with Firewalls
  • Participate in the planning and execution of migration projects to move applications and services to AWS cloud
  • Integrating JumpCloud with IAM Identity center for user authentication
  • Monitor system performance and troubleshoot issues, ensuring high levels of performance, availability, and reliability.

Education

BSc Science Laboratory Technology -

Federal Polytechnic Ede, Nigeria
01.2011

Skills

  • Operating Systems: UNIX, Linux (RHEL/CentOS 6, 7,8 & AlmaLinux)
  • Cloud Computing: AWS
  • CI/CD: Jenkins
  • Applications: Apache Web Server, Tomcat, Identity Management Server (IDM), LDAP Red Hat Satellite Server, NFS, SFTP, Postfix Mail Server, Samba
  • Programming: Bash/Shell scripting YAML
  • Monitoring Tools: Zabbix, Nagios, icinga, checkmk
  • Backup Tool: BackupPc, Veam, NetBackup
  • Networking: VPC, DHCP, TCP/IP, DNS, SSH, TCP/UDP, Domain Controller
  • Security/Internet Services: DUO Security, SeLinux, Firewalld, TCP Wrappers
  • Virtualization: VMWare, KVM
  • Containerization: podman, docker, rootless container
  • Automation: Ansible, Satellite
  • Troubleshooting: Unix/Linux (Desktop & Servers) RHEL/CentOS,Almalinux
  • Other Relevant Technology: Active Directory, CenrifyDc, Microsoft Outlook, Microsoft Azure portal, Jira, and Confluence, Slack Git, JumpCloud Identity provider

Certification

  • Red Hat Certified System Administrator
  • AWS Certified Cloud Practitioner
  • CyberArk Trustee Certification

Projects

Migration of legacy application into AWS Build, configuration, and maintenance of Jenkins servers Upgrade of rhle 6 servers to rhel 8 Build, configuration and maintenance of Checkmk monitoring tools. Installation and configuration multiple web applications with podman rootless container

Timeline

Linux System Administrator

IntelliSurvey INC
03.2022 - Current

Linux/Unix Systems Administrator

Insight Global/T-mobile
02.2018 - 03.2022

BSc Science Laboratory Technology -

Federal Polytechnic Ede, Nigeria

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Ramota Ogunjinmi