Core Linux System Administration

Install, configure, and maintain Linux servers (Oracle Linux, RHEL, CentOS, Ubuntu, etc.).
Manage users, groups, filesystems, partitions, LVM, and permissions.
Apply system patches and kernel upgrades.
Maintain services like SSH, DNS, NTP, DHCP, FTP, NFS, etc.

Package & Service Management

Use package managers (yum, dnf, apt) to install and manage software.
Configure and maintain application and database servers (Apache, NGINX, MySQL, PostgreSQL, etc.).

Security & Compliance

Secure servers via firewalls (iptables, firewalld, nftables).
Perform system hardening and vulnerability mitigation.
Configure SELinux, audit logs, and security tools.
Enforce compliance with security policies and best practices.
Support Security Tools installation and troubleshooting like EDR, Antivirus and Malware.

Backup, Recovery, and DR

Implement and monitor backup strategies using rsync, tar, Bacula, or enterprise tools.
Perform disaster recovery testing and scripting.

Monitoring & Performance

Automation & DevOps

Kubernetes (K8s) Responsibilities

Deploy and maintain Kubernetes clusters (using kubeadm, K3s, RKE, or managed services like EKS/AKS/GKE).
Manage containerized applications using Docker and Kubernetes.
Monitor Kubernetes clusters with Prometheus, Grafana, and Kube-state-metrics.
Implement Helm charts for application deployment.
Configure networking (CNI plugins like Calico/Flannel), ingress controllers (NGINX, Traefik), and service discovery.
Manage secrets and config maps, RBAC, namespaces, and quotas.
Handle persistent storage (using NFS, Ceph, or CSI drivers).
Troubleshoot pods, nodes, and deployments using kubectl, logs, and metrics.
Automate deployments via GitOps tools (ArgoCD, Flux).
Enforce policies using tools like OPA/Gatekeeper.
Participate in cluster scaling, upgrades, and capacity planning.

Documentation & Support

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