Linux System Adminstrator

Valiant Technologies LLC; Wilmington (DE); On-site; USD 80,000 - 120,000; Full time

Job summary

Valiant Technologies LLC is seeking an experienced Linux System Administrator to manage Linux-based server environments. The role focuses on installation, configuration, maintenance, monitoring, and security of Linux systems across enterprise environments.

The ideal candidate will have strong expertise in Linux administration, automation, and troubleshooting, with hands-on experience in RHEL/CentOS, Ubuntu, and SUSE, plus web servers like Apache and Nginx.

Qualifications

• Experience installing and configuring Linux servers at scale.
• Strong skills in shell scripting and automation.
• Experience with system monitoring, backups, and disaster recovery.

Responsibilities

• Install, configure, and maintain Linux OS across enterprise environments.
• Manage RHEL, CentOS, Ubuntu, and SUSE servers.
• Perform routine administration, monitoring, and maintenance.

Skills

Ubuntu Administration

Linux Server Setup

Shell Scripting

User & Group Mgmt

Filesystems & LVM

Kernel Patching

TCP/IP & DNS/DHCP

Apache & Nginx

Performance Troubleshooting

Job description

Work Authorization

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Job Summary

We are seeking an experienced Linux System Administrator responsible for managing, configuring, maintaining, and supporting Linux-based server environments. The ideal candidate should have strong expertise in Linux administration, server monitoring, system troubleshooting, security management, networking, and automation.

Key Responsibilities

• Install, configure, and maintain Linux operating systems across enterprise server environments.
• Manage Red Hat Enterprise Linux (RHEL), CentOS, Ubuntu, and SUSE Linux servers.
• Perform daily system administration, monitoring, and maintenance activities.
• Manage user accounts, groups, file permissions, and access controls.
• Configure and maintain file systems, disk partitions, LVM, and storage devices.
• Perform operating system upgrades, kernel patching, and security updates.
• Monitor system performance, CPU utilization, memory, disk space, and network activities.
• Troubleshoot server issues, system failures, and application performance problems.
• Configure and manage DNS, DHCP, SSH, NFS, FTP, and TCP/IP services.
• Implement backup, restoration, and disaster recovery procedures.
• Manage system security, firewall configurations, and vulnerability remediation.
• Automate routine administration tasks using Shell and Bash scripting.
• Configure and maintain Apache and Nginx web servers.
• Support production environments and resolve infrastructure-related incidents.
• Maintain system documentation and operational procedures.

Required Technical Skills

• Ubuntu and CentOS Administration.
• Linux Server Installation and Configuration.
• Shell Scripting and Bash.
• User and Group Management.
• File Systems, LVM, and Disk Management.
• Kernel Management and OS Patching.
• TCP/IP, DNS, DHCP, SSH, NFS.
• Apache and Nginx.
• Linux Performance Monitoring and Troubleshooting.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.