Linux Administrator

Key Responsibilities

Linux System Administration &

• Infrastructure

• Install, configure, administer and maintain enterprise Linux servers.
• Conduct daily infrastructure health checks, including CPU, memory, disk usage, inode utilisation and system services.
• Review system logs, identify failures and proactively address potential outages.
• Ensure high availability, system reliability and optimal infrastructure performance.
• Perform regular system updates, patching and security remediation.

Virtualisation &

• Platform Support

• Support Linux virtual machines hosted on Red Hat and Nutanix platforms.
• Assist with migration activities involving RHEV, Red Hat OpenShift Virtualisation and Nutanix AHV.
• Troubleshoot virtualisation-related incidents and infrastructure issues.

Automation &

• Configuration Management

• Install and configure Red Hat Satellite and Ansible.
• Develop, maintain and update Ansible playbooks.
• Automate patching, configuration management and routine administrative tasks.
• Deploy and support infrastructure monitoring agents, including Xymon and IRIS.

Incident Management &

• Technical Support

• Investigate and resolve incidents, service requests and change requests.
• Troubleshoot Linux operating system, infrastructure and application-related problems.
• Escalate complex technical issues to senior support teams or vendors.
• Administer and support Zimbra email services.
• Participate in standby and after-hours support for critical P1/P2 incidents.

Security, Access &

• Backups

• Manage Linux user accounts, LDAP authentication, permissions and password policies.
• Maintain secure access controls in line with security requirements.
• Monitor NetBackup jobs, resolve backup failures and perform restore testing.

Documentation &

• Vendor Engagement

• Maintain technical documentation, system configurations and operational runbooks.
• Participate in vendor technical engagements and infrastructure improvement initiatives.

Required Technical Skills

• Strong hands-on Linux system administration and troubleshooting.
• Red Hat Enterprise Linux (RHEL).
• Linux virtualisation environments.
• Ansible automation and configuration management.
• Red Hat Satellite administration.
• Linux installation, maintenance, patching and security.
• LDAP authentication and user access management.
• Enterprise monitoring, backup and incident management.
• Production infrastructure support.

Advantageous Experience

• Red Hat OpenShift Virtualisation / OpenShift Kubernetes Engine (OKE).
• Nutanix AOS / Nutanix AHV.
• Oracle administration or related Oracle technical skills.
• Zimbra email server administration.
• Veritas NetBackup.
• Entuity and AppDynamics monitoring.
• Xymon and IRIS monitoring tools.

Additional Requirements

• Ability to work on-site in Centurion every Monday, Wednesday and Friday.
• Availability for standby or on-call support when required.
• Strong troubleshooting, communication and problem-solving abilities.

How to Apply

Interested candidates should email an updated CV highlighting their Linux, Red Hat, automation and virtualisation experience to:

? charlene@osourceint.com

Email Subject: Application – Linux Engineer – Centurion