Linux System Administrator

2 weeks ago

ajit, India FINVASIA Full time

Job Summary:

We are looking for a knowledgeable and proactive Linux System and Networking Administrator with strong experience in virtualization (especially Proxmox and VMware vCenter) and a deep understanding of enterprise networking. You will be responsible for maintaining our Linux systems, managing virtualized environments, and ensuring robust and secure network operations across the organization.

Key Responsibilities:

Linux System Administration

  • Install, configure, and maintain Linux servers (Ubuntu, CentOS, RHEL) in physical and virtual environments.
  • Manage web, database, file, and directory services, including Apache/Nginx, MySQL/PostgreSQL, Samba, and LDAP.
  • Develop and maintain system automation scripts using Bash, Ansible, or similar tools.
  • Ensure system uptime, performance, and reliability through proactive monitoring and maintenance.

Virtualization & Infrastructure Management

  • Administer and maintain Proxmox VE and VMware vCenter/ESXi virtual environments.
  • Provision, clone, snapshot, and manage virtual machines and containers.
  • Monitor and optimize virtual resource utilization (CPU, memory, storage).
  • Assist in planning and implementing scalable, redundant virtualization infrastructure.

Network Administration

  • Design, configure, and manage LAN/WAN environments, including VLANs , routing , trunking , and link aggregation .
  • Administer and maintain firewalls (e.g., pfSense, iptables, FortiGate), VPNs , and secure remote access solutions (OpenVPN, WireGuard).
  • Monitor network performance and troubleshoot issues using tools like tcpdump , Wireshark , and NetFlow .
  • Maintain DNS, DHCP, NAT, and port forwarding rules in both physical and virtualized networks.

Security and Compliance

  • Harden Linux systems and network infrastructure based on best practices.
  • Conduct periodic audits, patching, and updates for operating systems, hypervisors, and firewalls.
  • Implement and maintain intrusion detection/prevention systems (IDS/IPS) and network access control.

Support & Documentation

  • Provide tier 2/3 support for Linux, network, and virtualization-related issues.
  • Document infrastructure, network diagrams, system configurations, and SOPs.
  • Work closely with IT security, DevOps, and cloud teams to ensure a consistent and secure infrastructure.

Requirements:

Experience

  • 3–5+ years of experience in Linux system administration and networking.
  • 3+ years’ experience managing Proxmox or VMware vCenter environments.

Technical Skills

  • Proficient in Linux (RHEL, CentOS, Ubuntu).
  • Hands-on experience with Proxmox VE , vSphere , and VMware vCenter .
  • Deep understanding of networking fundamentals : TCP/IP, DNS, DHCP, VLANs, routing protocols, and NAT.
  • Experience configuring and managing firewalls and VPNs .
  • Strong scripting and automation skills (Bash, Ansible, or Python).
  • Familiar with monitoring/logging tools: Zabbix, Grafana, ELK, or similar.

Preferred Qualifications

  • Certifications: RHCE, VCP, CCNA, CompTIA Network+, or equivalent.
  • Experience with SDN, high availability setups, and network segmentation.
  • Familiarity with hybrid cloud infrastructure or on-premises to cloud migrations.

Soft Skills

  • Strong analytical and troubleshooting skills.
  • Ability to work independently and under pressure.
  • Good communication and documentation abilities.
  • Willingness to participate in an on-call rotation.

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