
Linux System Administrator
2 days ago
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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