System Administrator Linux

Ephraim Ojo Linux System Administrator/Engineer

Champaign, IL ***********@*****.*** 404-***-****. Professional Summary

Dedicated and skilled Linux System Administrator with 4 years of practical experience in deploying, configuring, and managing secure and optimized Linux systems across on- premises and cloud platforms. Proven ability to automate processes, troubleshoot complex issues, and enhance system performance and security. Certifications

- AWS Certified Solutions Architect - In view

- Red Hat Certified System Administrator – In view Skills

- Operating Systems: Linux (RHEL/CentOS 7 & 8), Windows (2016, 2019, 10)

- Applications: Apache Web Server, Active Directory, Domain Controller, Red Hat, Ansible Tower, Zabbix, Qualys, NFS, SFTP

- Programming: Bash/Shell scripting

- Monitoring Tools: Zabbix

- Networking: DHCP, TCP/IP, DNS, SSH, TCP/UDP, SMTP

- Virtualization: VMWare VCenter, VMWare ESXi

- Automation: Ansible, Bash scripting

- Others: Microsoft Office 365, Microsoft Outlook, Jira, Confluence, Veeam, Microsoft Teams

Professional Experience

Linux System Administrator

Infosys, Atlanta, GA

September 2021 – Present

- Planned, installed, configured, managed, and troubleshooted virtual and physical servers.

- Developed Ansible playbooks to manage system configurations and automate repetitive tasks.

- Automated routine system tasks with Bash scripting.

- Deployed Linux operating systems on physical Dell servers.

- Installed and managed Windows operating systems on physical Dell servers.

- Installed and administered VMware ESXi on physical hosts.

- Deployed and managed virtual Linux machines on VMware ESXi and VMware vCenter.

- Configured RAID storage on physical servers for redundancy and improved performance.

- Launched virtual machines via AWS EC2.

- Integrated and administered users and servers using Microsoft Active Directory.

- Performed system capacity planning and performance testing.

- Deployed and maintained highly available, scalable, and fault-tolerant systems on AWS using Elastic Load Balancing and Auto Scaling.

- Established and managed local file systems with standard and LVM methods.

- Created and managed user accounts and groups locally and centrally with Microsoft Active Directory.

- Monitored system resource usage with Zabbix and resolved issues proactively.

- Enforced user security policies through password aging and sudoers configurations.

- Secured systems by configuring firewalls to allow only necessary ports and services.

- Implemented system lockdown procedures to enhance security.

- Configured and managed networking on RHEL systems using TCP/IP.

- Troubleshooted and solved network and performance issues.

- Integrated Linux systems with Red Hat Satellite for package management.

- Applied system updates and patches monthly, addressing critical vulnerabilities highlighted by the cybersecurity team.

- Created and managed NFS file systems and shared them across multiple client machines.

- Installed and configured LAMP stacks for development environments.

- Conducted critical system administration tasks in single-user mode.

- Set up and managed Samba servers to share data between Linux and Windows machines.

- Established secure, key-based, password-less SSH authentication on servers.

- Used Atlassian Jira to track and resolve issue tickets.

- Documented server configurations and procedures with Atlassian Confluence and Microsoft SharePoint.

- Performed regular system backups using Veeam Backup and Replication tools.

- Provided weekly system performance and health reports to management.

- Participated in a 24/7 on-call rotation for production support. Linux System Administrator

Providence Solutions, Atlanta, GA

July 2020 – September 2021

- Set up servers and applied server patches.

- Diagnosed and fixed TCP/IP network problems.

- Handled user account management on both local and domain-joined servers.

- Prevented direct SSH root access on servers.

- Managed file systems and maintained security on Linux servers.

- Personalized user shell environments with shell initialization files.

- Used cron to schedule and automate tasks.

- Supported software developers with various needs.

- Secured dedicated servers by disabling unnecessary services.

- Set up RAID storage on physical servers for enhanced data redundancy and performance.

- Configured password aging policies on servers.

- Addressed system and process issues reported by Prometheus. Education

AS in Engineering, Maritime Academy of NG, Oron - 2014

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