Linux System Administrator

VUI SYSTEMS PTE. LTD.; Singapore; In loco; SGD 75.000 - 120.000; Tempo pieno

Descrizione del lavoro

VUI SYSTEMS PTE. LTD. in Singapore seeks a hands-on Linux systems administrator to manage enterprise Red Hat based environments. You will install, configure, monitor, patch, and harden servers, and implement automation using Bash and Ansible across on-prem and cloud platforms.

The role requires 5+ years of hands-on Linux administration in production, RHCSA/RHCE is advantageous, and a Diploma/Degree in CS/IT/Engineering. Strong problem solving and collaboration skills are expected.

Competenze

• Diploma/Degree in Computer Science, Information Technology, Engineering, or a related discipline.

Mansioni

• Install, configure, administer, and maintain Linux servers (RHEL and others).
• Perform day-to-day Linux administration (user/group management, file systems, permissions, services, processes, packages, configuration).
• Manage server provisioning, configuration, upgrades, migrations, decommissioning.
• OS patching, vulnerability remediation, security hardening, CIS compliance.
• Monitor server availability and performance.
• Troubleshoot Linux OS, connectivity, performance, storage, network incidents.
• Root-cause analysis for recurring incidents and permanent fixes.
• Manage LVM, filesystem expansion, NFS, storage configurations.
• Support LDAP/Active Directory/Kerberos/SUDO/PAM auth.
• Configure Linux networking (DNS, routing, firewall).
• Develop Shell/Bash scripts to automate tasks.
• Support monitoring, backup, enterprise schedulers and infra tools.
• Maintain runbooks, inventory, architecture docs.
• Participate in incident, problem, change, vulnerability, capacity processes.
• Support disaster recovery exercises and business continuity.

Conoscenze

Linux administration

Bash scripting

RPM/YUM/DNF

LVM

NFS

SSH

TCP/IP

DNS

LDAP/Kerberos

security hardening

patching

vulnerability remediation

VMware/Nutanix

AWS

Ansible

automation tools

monitoring platforms

CyberArk

backup technologies

enterprise schedulers

Formazione

Diploma or Degree in CS/IT/Engineering

Strumenti

None

Descrizione del lavoro

Key Responsibilities

• Install, configure, administer, and maintain Linux servers, primarily Red Hat Enterprise Linux (RHEL) and other supported Linux distributions.
• Perform day-to-day Linux administration, including user/group management, file systems, permissions, services, processes, packages, and system configuration.
• Manage server provisioning, configuration, upgrades, migrations, and decommissioning.
• Perform regular OS patching, vulnerability remediation, security hardening, and CIS compliance activities.
• Monitor server availability, CPU, memory, disk, filesystem, network, and overall system performance.
• Troubleshoot Linux OS, application connectivity, performance, storage, filesystem, and network-related incidents.
• Perform root-cause analysis for recurring or major incidents and implement permanent corrective actions.
• Manage LVM, filesystem expansion, mount points, NFS, and storage-related configurations.
• Support authentication and access management technologies such as LDAP, Active Directory, Kerberos, SSH, sudo, and PAM.
• Configure and troubleshoot Linux networking, including DNS, routing, firewall rules, ports, and connectivity.
• Develop and maintain Shell/Bash scripts to automate repetitive operational and administrative activities.
• Support monitoring, backup, enterprise scheduling, security, and infrastructure management tools.
• Maintain server build standards, operational procedures, architecture documentation, inventory, and technical runbooks.
• Participate in incident, problem, change, vulnerability, and capacity-management processes.
• Support disaster recovery exercises, backup/recovery validation, and business continuity requirements.
• Provide production support and support for critical incidents and planned maintenance where required.

Technical Skills:

Strong knowledge of RHEL/Linux administration, Bash/Shell scripting, system, RPM/YUM/DNF, LVM, NFS, SSH, sudo, TCP/IP, DNS, LDAP/Kerberos, performance troubleshooting, patching, vulnerability remediation, and security hardening is expected.

Experience with VMware/Nutanix, AWS or other cloud platforms, Ansible or similar automation tools, monitoring platforms, CyberArk, backup technologies, and enterprise schedulers would be advantageous.

Experience & Qualifications:

Diploma/Degree in Computer Science, Information Technology, Engineering, or a related discipline, with approximately 5+ years of hands‑on Linux system administration experience in a production or enterprise environment. RHCSA/RHCE or equivalent Linux certifications are advantageous.