Lucknow, Uttar Pradesh
Job Summary
The Linux L3 Engineer is responsible for advanced administration, troubleshooting, and optimization of Linux systems across on-premises and cloud platforms. The role includes owning complex incidents, driving automation, ensuring system reliability, and supporting hybrid infrastructure services integrated with storage, cloud, virtualization, and enterprise tooling.
Key Responsibilities
Perform advanced administration of Linux servers (RHEL, CentOS, Ubuntu) in enterprise environments. • Handle L3-level troubleshooting for OS, CPU, memory, disk, kernel, and performance issues. • Manage OS patching, upgrades, kernel tuning, and image lifecycle. • Perform server provisioning, decommissioning, and configuration management. • Own and resolve P1/P2 incidents related to Linux systems. • Perform root cause analysis (RCA) and implement preventive actions. • Support change, release, and configuration management processes. • Proactively monitor system performance and ensure availability. • Analyze CPU, memory, IO, filesystem usage and optimize system performance. • Implement proactive measures and automation for self-healing systems. • Support Linux workloads on AWS and OCI, including: o VPC, networking, load balancers, storage (ZFS, EBS-like services) o Monitoring and alerting • Manage Linux-based workloads on IaaS and PaaS platforms, including container hosts. • Build and support infrastructure provisioning using Terraform (IaaS). • Develop automation scripts (Shell/Python) for operational efficiency. • Support Kubernetes-based platforms (SRE/PRE scope). • Manage and troubleshoot container host environments. • Support Linux integration with NAS solutions such as Nasuni Filers. • Monitor filer health, cache utilization (
Skill Requirements
Operating Systems: RHEL, CentOS, Ubuntu • Core Linux Skills: • LVM, filesystem management, systemd, networking • Kernel tuning, performance troubleshooting • Scripting & Automation: Shell scripting, Python • Cloud Platforms: AWS, OCI • Infrastructure as Code: Terraform • Containers: Kubernetes, Docker • Monitoring Tools: Nagios, Prometheus, CloudWatch, OEM tools • Storage & NAS: Nasuni, NFS, CIFS • Virtualization: VMware (basic integration knowledge) Strong experience in: • Experience in hybrid cloud environments (on-prem + cloud) • Exposure to DevOps/SRE practices • Knowledge of configuration management tools (Ansible, Puppet, Chef) • Familiarity with enterprise backup solutions (Dell ABS, Data Domain) • Understanding of networking concepts (DNS, TCP/IP, firewall basics) • Experience in event correlation and monitoring optimization Hands-on with: • VMware Aria Operations (vROps), Aria Automation, Log Insight • Dell VxRail / PowerEdge infrastructure • Storage (vSAN, NAS, Dell Unity, ZFS – basic integration) • Lifecycle Manager (LCM), patching & upgrades • Monitoring & alerting tools (Datadog, SolarWinds, etc.) • Basic scripting: PowerCLI / PowerShell
Other Requirements
Experience in: • Hybrid cloud environments (AWS, OCI basics) • Terraform / Ansible automation • Backup tools (Data Domain, Veeam, Commvault) • Security & vulnerability remediation (Qualys, patching cycles) • Familiarity with: ITIL processes & ServiceNow Certifications • RHCE / RHCSA (Preferred) • AWS Certified SysOps / Solutions Architect (Preferred) • Certified Kubernetes Administrator (CKA) – Good to have
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