Santosh Kumar
Hyderabad
Summary
Dedicated Linux Administrator with over 5.8 years of experience in managing and optimizing Linux-based systems. Proficient in automation using tools like Ansible and Cron. Strong focus on system security, including patching, firewalls, and user permissions. Proficient in system installation, configuration, and maintenance, with expertise in automation tools. Demonstrated ability to enhance system performance, ensure security, and troubleshoot issues. Implemented automation to improve system uptime by 30%.
Overview
10
10
years of professional experience
Work History
Technical Engineer Linux
Varite India Private Limited
Hyderabad
01.2025 - Current
- Providing 24/7 support
- Automated server provisioning with Ansible, achieving a 50% decrease in deployment time.
- Improved system uptime by 30% with NAGIOS, ZABBIX, and OP Manager.
- Responsible for installing, configuring, and maintaining LVM, along with managing RHEL and Ubuntu OS installation, configuration, administration, and upgrades.
- Managing File Systems- Creating, Mounting, Modifying & repairing the file systems (ext3, ext4, & XFS)
- Diagnosing user-related issues and providing solutions via telephone, email, and other tools.
- Experience in patch management for complete Linux (RHEL & CentOS, Ubuntu) infrastructure using Manual or any patching tool.
- Managing and optimizing Jenkins installations on Linux, ensuring high availability and minimal downtime for continuous integration and delivery.
- Maintaining patch updates, security hardening, and software and hardware updates to provide for a stable infrastructure.
- Responsible for monitoring server performance and resource utilization using tools like TOP and PS, and administering servers to maintain system efficiency.
- Basic knowledge of Shell scripting to automate the daily routine tasks
- Prepare System-related issues RCA’s post in-depth analysis done, and fix them for occurrence
- Monitoring of system logs, user usage of system resources, Disk I/O, CPU & memory utilization
- Remote Administration of a Linux server using SSH.
- Skilled in User management by creating, modifying user accounts and groups, assigning permissions, and configuring access to various systems.
- Provided support for building servers, user administration tasks, deployment, resolving issues, software installation and performance tuning.
- Contractual role, Client – ServiceNow
Technology Specialist
Locuz Enterprise Solutions Ltd
Hyderabad
11.2021 - 06.2024
- Escalating critical issues to a higher level to resolve them before the due date.
- Configuring LVM Creating, Extending & Reducing in different Linux flavours
- Hands-on experience on Linux / Unix Operating System, Administration, and Troubleshooting
- Onboarding the servers to monitoring tools and assigning the metric values
- Installation and configuration of NFS, NTP, etc.
- Processes administration and management, including monitoring, starting, stopping, and killing various processes using Ansible scripts.
- Maintain accurate system and troubleshooting documentation.
- Administered and maintained over 200 RHEL and Ubuntu servers in a production environment.
- Monitored servers daily using Nagios and Zabbix, ensuring high availability and proactively identifying issues.
- Implement server hardening best practices, including firewall rules, and secure SSH practices.
- Reduced software installation time by 60% using batch commands for YUM/DNF (RHEL) and APT (Ubuntu) during system updates and patching.
- Maintained the inventory system, reducing administrative efforts by 60%.
- Protocols for transfer include SCP, FTP, Rsync, and remote login SSH.
- Developed a secure user account and access management solution, cutting administrative overhead by 25%.
- Created a centralized wiki, achieving a 40% decrease in training time for new team members.
- Crafted technical documentation, boosting system and network comprehension by 40%.
- Performed patching and upgrades during weekend downtime.
- Executed scripts across development, staging, and production environments.
Linux System Administrator
Thomson Reuters Pvt Ltd.
Hyderabad
12.2015 - 07.2018
- Achieved 99.9% uptime for critical services through continuous monitoring.
- Provided technical support for server access and performance issues.
- Manage Linux servers (Red Hat, CentOS, Ubuntu) for high availability and performance.
- Monitor systems and apply upgrades and security patches.
- Automate tasks using Bash and Ansible.
- Created and managed users, groups, rights, and access permissions to enforce system security.
- Experienced in collaborating with Network, Database, and Application teams to support IT projects and ensure customer satisfaction.
- Network Management Tools like Remote logins and Port Scanning.
- Assisted in the deployment and maintenance of over 200 Linux servers.
- Supported the roll-out of system updates and patches, ensuring 99.9% system availability
- Troubleshoot system issues and maintain configuration documentation.
- Installed, configured, and maintained Ubuntu & RHEL systems for client environments.
- Adjusted user limits and assigned ACL and SUDO permissions.
- Assisted with disk clean-up, log management, and performance tuning.
- Collaborate with IT teams on infrastructure projects.
- Creation of Hard and Soft Links for Files and Directories.
- Automation and Scheduling jobs/activities using CRON and AT jobs.
- Configuring and managing LVM volumes, and setting file/directory permissions using ACL, SUID, SGID, and sticky bit.
Education
Bachelor of Arts B.A. Correspondence -
Dr. B.R. Ambedkar Open University
Hyderabad, Telangana03.2008
Skills
- RHEL Linux Ubuntu Unix OS CentOS Security DNS Automation Server Management Server Configuration Patch Management OS Installation Installation Troubleshooting RHEL ITIL Process Scripting NFS NTP I/O FTP SSH RCA Top ps iostat YUM Docker RPM APT vmstat sar TCP/IP Ansible LVM Rsync scp Git GitHub Ping tcpdump telnet netstat nmap firewall User Management Zabbix Firewall configuration Nagios OpManager ACL Server Hardening IT Infrastructure Management Cloud Security Passion to learn New Technologies Templates VM Creation VM Deletion Maintenance of Linux Servers Permission Management Performance Monitoring Disk RAM CPU Linux Systems Administration Server Installation & Configuration System Monitoring Patching & Updates Troubleshooting & Diagnostics User Management Permissions & Access Control Backup & Restore Security Hardening Firewall Configuration Networking TCP/IP, DNS, DHCP Configuration Management Ansible Log Management Syslog, Logrotate Containerization Docker Disk Management LVM, RAID Performance Tuning System Automation Package Management YUM, APT, RPM SSH & Remote Access Cloud Integration AWS File System Management ext4, NFS, ZFS High Availability & Load Balancing Automated Monitoring Tools Nagios, Zabbix Version Control Git
- Excellent Communication Skills
- Problem solving
- Adaptability
- Analytical Thinking
- Coordinating
- Ability to work independently
- Interact & work with global team
- Teamwork
Awards
Incident Response and Problem Resolution: Demonstrated expertise in quickly resolving system issues and minimizing downtime., Automated Routine Tasks: Created automation scripts to streamline tasks, cutting manual effort by 50% and speeding up deployments., Centralized system setup: Set up a centralized system with NAGIOS/ZZBBIX, reducing incident response time by 60%., Documentation and Training: Documented system configurations and procedures to boost team collaboration, Introduced a software update, cutting system errors by 30% and boosting application performance by 25%.
Timeline
Technical Engineer Linux
Varite India Private Limited
01.2025 - Current
Technology Specialist
Locuz Enterprise Solutions Ltd
11.2021 - 06.2024
Linux System Administrator
Thomson Reuters Pvt Ltd.
12.2015 - 07.2018
Bachelor of Arts B.A. Correspondence -
Dr. B.R. Ambedkar Open University
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