Linux Administrator

Zkušený seniorní správce systému Linux s více než 12 lety zkušeností v oblasti RedHat Linuxu, virtualizace a cloudových řešení prostřednictvím AWS. Zkušený ve správě uživatelských účtů, monitorování systému a optimalizaci výkonu serverů. Držitel certifikátů RHCE a RHCSA, nadšený do řešení složitých IT problémů a budování odolných infrastruktur. Silné zázemí v oblasti automatizace, skriptování, správy oprav a konfigurace sítě.

Senior Linux System Admin (Lead)
12/2023 - Present
Responsible for installation, configuration, troubleshooting, and administration of Red Hat Enterprise Linux & Rocky Linux, CentOS, Ubuntu, and Windows.
Proficient in Shell scripting and Infrastructure-as-Code (Ansible, Puppet, Chef) for automation.
Deep knowledge of Linux internals, kernel architecture, process and memory management, file systems, and system calls.
Hands-on experience with AWS, Azure, er, Kubernetes, vSphere, vCenter, ESXi, and vSAN.
Designed and implemented automated patch management process using Ansible.
Configured and maintained network hardware, firewalls, and bare metal servers.
Enhanced infrastructure security through server hardening and compliance with regulatory standards.

IT Analyst
02/2017 - 11/2023
Provided end-to-end support for Red Hat Enterprise Linux, AIX, Ubuntu CentOs, HP-UX Oracle PL/SQL.
Expertise in Redhat Satellite management and automation for Patch Management through Ansible scripts.
Configured and provisioned Linux servers for scalable infrastructure solutions.
Expertise in OS hardening, security principles, vulnerability scanning, and intrusion detection.
Configured and administered NFS and SAMBA servers for secure file sharing.
Managed user accounts through centify tool.

System Admin Analyst
09/2014 - 01/2017
Deployed and administered virtual machines using VMware for optimized resource allocation.
Handled user account management and troubleshooting login issues.
Configured and maintained network interfaces, including bonding and SSH troubleshooting.
Maintained and extended logical volume management (LVM) systems for flexible storage.
Handled patch management and servers commissioning/decommissioning.

System Administrator
01/2014 - 08/2013
Collaborated with cross-functional teams to troubleshoot critical system issues.
Utilized ILO console for remote server management.
Created and maintained swap partitions and swap files for optimized system performance.
Managed file system and handled patch management with Ubuntu OS.

Jr. System Administrator
05/2013 - 12/2013
Installed and configured Linux environments on VMware platforms.
Monitored system services and processes for optimal server availability.
Managed Linux servers and implemented monitoring strategies for system health.

Jr. System Administrator
06/2012 - 04/2013
Supported junior-level system administration tasks for Linux and Windows servers.