Job Role: Oracle Linux and Red Hat Linux L3 Administrator (24×7, Remote)
Designation: Linux Technical Specialist
Location: Hybrid Work Mode (India)
Client: UAE-Based Client
Job Type: Full-Time / Contract / Shift-Based
Experience: Minimum 5 Years
Positions: 3 (Three)
Contract: Minimum 5 years (Will be renewed every 2 years)

Overview

Seeking a Linux L3 Administrator with extensive experience in Oracle Linux 7.x/8.x/9.x and Red Hat Linux, responsible for managing complex, multi-server, and clustered environments in a 24×7 operational setup.

Key Responsibilities

• System Administration: Manage and troubleshoot critical Linux servers, including web servers (Apache, Nginx), application servers (Tomcat, WebLogic), database servers (MySQL, PostgreSQL, Oracle DB), and file servers (NFS, SMB, SAN/NAS).
• Patch Management & Upgrades: Apply patches, updates, and security fixes; perform kernel upgrades and rollbacks with minimal downtime.
• Clustering & HA: Configure and maintain HA clusters, load balancers, and failover solutions using Oracle Clusterware, Red Hat Cluster Suite, Pacemaker, Corosync, Keepalived.
• Critical Linux Activities:
  • Kernel tuning and parameter optimization for performance and stability.
  • Troubleshoot disk space, memory leaks, and high CPU utilization using tools like top, htop, iostat, vmstat.
  • Resolve boot issues, filesystem corruption, and network outages.
  • Implement security hardening, SSH key management, and access control policies.
• Multi-Server Management: Administer and optimize large-scale deployments with multiple web servers, databases, and application servers.
• Monitoring & Optimization: Deploy and monitor servers using Nagios, Zabbix, Grafana, ELK Stack, and analyze logs for proactive issue detection.
• Automation & Scripting: Develop and maintain scripts in Bash, Python, Ansible, Shell for tasks like log rotation, backup automation, and configuration management.
• Backup & Disaster Recovery: Implement comprehensive backup and recovery plans for databases, application data, and system configurations. Test and validate recovery procedures regularly.
• Security Compliance:
  • Manage firewall rules, SELinux, IPTables, and TCP Wrappers.
  • Mitigate security vulnerabilities through regular scanning, patching, and log analysis.
  • Implement and monitor SSL/TLS certificates and manage secure communications.
• Documentation: Maintain detailed SOPs, runbooks, and troubleshooting guides for critical incidents and complex environments.

Required Qualifications and Skills:

• 5+ years in Linux Administration (Oracle Linux, Red Hat, CentOS, Ubuntu).
• Expertise in clustering, HA, load balancing, and multi-server management.
• Strong scripting skills in Bash, Python, Ansible, Shell.
• Advanced troubleshooting for Apache, Nginx, Tomcat, WebLogic, MySQL, PostgreSQL.
• Monitoring using Nagios, Zabbix, Grafana, ELK Stack.
• Security hardening and incident response management.
• Certifications: RHCSA, RHCE, Oracle Linux Admin (Preferred).

Work Schedule:

• 24×7 rotational shifts, including weekends and holidays
• Remote work with on-call support as required.

Contract: Minimum 5 years (Will be renewed every 2 years)