Sr. Linux Admin

• Mar 2021 - Present

• Installed and upgraded Linux operating systems, kernel, and software, ensuring the latest patches and updates were applied to address bugs and vulnerabilities. • Worked on incidents and change requests in Production, Development, and Test environments, effectively resolving issues and minimizing downtime. • Built virtual machines based on customer requirements, performing thorough Acceptance Service Checks to validate functionality before delivery. • Analysed system log files (netstat, top, ps, sar, iostat, nfsstat, mpstat, tcpdump) to identify performance bottlenecks and implemented improvements. • Provided continual internal communication to enhance the organization's effectiveness in addressing critical client issues. • Deployed monthly patch updates using Ansible, ensuring servers remained secure and up-to-date. • Provided support for the production system, responding to and resolving issues promptly, including off-hours emergency problem resolution. • Coordinated the resolution of problems logged in the tracking system with operations and other team members, ensuring timely resolutions. • Assisted in performing ESXi patches, updates, and resolved associated system outages and incidents. • Continuously monitored server activity using the Icinga monitoring tool, proactively troubleshooting performance issues. • Managed disk space, file system, and LVM setup, ensuring efficient usage and administration of HA Clusters. • Implemented infrastructure components to meet business requirements, ensuring a stable and scalable environment. • Conducted troubleshooting and root cause analysis for recurring and unresolved issues, addressing both short-term and long-term server health concerns. • Installed and configured Linux servers over the network, adhering to client specifications and ensuring optimal functionality. •Monitored server logs and performed regular troubleshooting, ensuring end-users had access to reliable and up-to-date software. Show less

Freelance

• Jul 2019 - Mar 2021

System Administrator

• Sep 2018 - May 2019

• Managed and administered KVM virtualization on CentOS Linux, creating and maintaining virtual machines to support business operations. • Managed Linux package installations and upgrades using rpm and yum, ensuring system stability and security. • Configured Kerberos authentication on Linux machines, enhancing security and enabling centralized authorization and authentication. • Successfully implemented and provided troubleshooting support for project management software such as GitLab and Redmine, enabling effective collaboration and project execution. • Conducted system performance analysis and optimization, identifying and resolving performance bottlenecks to enhance overall system efficiency. • Developed and maintained detailed documentation of system configurations, procedures, and troubleshooting guides. Show less

Senior Engineer

• Sep 2014 - Sep 2017

• Installed and configured Ubuntu and Fedora systems, ensuring proper functionality and performance. • Managed Linux users and groups, implemented file permissions, ACLs, SELinux policies, and Firewall rules to enhance security and access control. • Administered Linux file systems, including management of software packages using Debian, rpm, and yum, ensuring system stability and compatibility. • Monitored and managed system logs, processes, and scheduled jobs, proactively addressing any issues and optimizing system performance. • Deployed and managed LVM (Logical Volume Manager) for efficient storage management, including resizing logical volumes and volume groups, implementing thin provisioning, and performing snapshots and backups. • Developed Bash shell scripts to automate administrative tasks, increasing operational efficiency and reducing manual effort. • Utilized BASH scripting to automate day-to-day activities, such as system monitoring, log analysis, and backup processes. • Installed and managed VMware ESXi server and Vcenter, ensuring virtualized infrastructure availability and performance. • Utilized VMware VMotion to seamlessly migrate virtual machines between data centres, minimizing downtime and improving resource utilization. • Implemented and provided troubleshooting support for project management software, such as SVN (Subversion) and Redmine, enabling effective collaboration and version control. Show less

Customer Support Engineer

• Sep 2013 - Dec 2013

• Installed and configured Ubuntu systems, ensuring proper functionality and performance. • Managed Linux users and groups, implemented file permissions, ACLs, SELinux policies, and Firewall rules to enhance security and access control. • Administered Linux file systems and managed software packages using deb, ensuring system stability and compatibility. • Monitored and managed system logs, processes, and scheduled jobs, troubleshooting booting issues and resolving any system-related problems. • Provided technical support for network printers, FTP, and application servers, ensuring their smooth operation and resolving any issues reported by users. • Conducted regularly scheduled preventative maintenance tasks on servers, including updates, patches, and performance optimization. • Managed and implemented IT infrastructure components and upgrades to meet organizational requirements, ensuring system availability and scalability. Show less

Customer Support Engineer

• Jun 2012 - Jul 2013

• Create and manage the user accounts, which includes user rights with security and group creation in Active Directory • Technical support of Printers, FTP, and Application Servers. • Playing the key role of a Responsible Floor Engineer, managing more than 200 systems. • Troubleshooting software issues, hardware problems, and Network issues like network connectivity issues. • Installations of OS like Windows 2003, XP, windows 7 • Troubleshooting all Laptop problems & configuring the internal wireless network in the laptop. • Configuring Network printers and printer sharing. • Troubleshooting LAN problems. Show less

Technical Officer

• Apr 2010 - Nov 2011

• Manage and Troubleshoot Desktops\Laptops, hardware & software’s. • Install and Configuration Client Operating Systems. • Manage network printers • Technical support of Printers, FTP, and Application Servers. • Manage and Troubleshoot Desktops\Laptops, hardware & software’s. • Install and Configuration Client Operating Systems. • Manage network printers • Technical support of Printers, FTP, and Application Servers.