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Key Responsibilities: Linux System Administration Administer Linux servers (Ubuntu Pro or RHEL/CentOS) in production and staging environments. Configure and secure SFTP, SAMBA, and NFS services for file sharing and data integration. Perform OS hardening, patch management, and automation using scripts or configuration management tools. Manage user accounts, permissions, firewalls, system logs, and process monitoring. Troubleshoot performance, connectivity, and service issues across infrastructure layers. Web/Application Server Management Install, configure, and tune Apache Tomcat and Nginx for high-performance web and application hosting. Deploy WAR files and configure server.xml for Tomcat tuning. Setup reverse proxy, load balancing, and SSL termination in Nginx. Cloud DevOps (AWS) Manage EC2 instances, EBS volumes, and SSH access. Configure VPC subnets, route tables, security groups, and ELB (Application & Network Load Balancers). Setup IAM roles, policies, cross-account access. Manage S3 storage, bucket policies, and lifecycle rules. Setup and mount EFS, configure Route 53 DNS. Optional / Preferred Automation using Bash, Ansible, or Terraform. Monitoring and logging with Prometheus, Grafana, ELK, or CloudWatch.