Gyan Sagar
Bengaluru
Summary
Senior Linux System Administrator with expertise in building customer-focused cultures that prioritize efficient solution delivery across diverse technologies. Proficient in monitoring and resolving system, application, and process alerts, ensuring optimal performance. Strong skills in administration, documentation, problem analysis, and customer relationship management. Demonstrates flexibility, quick learning, and the ability to thrive under pressure.
Overview
4
4
years of professional experience
Work History
Senior Associate Consultant
infosys
Bangalore
03.2025 - Current
- Provided 24/7 support for Linux delivery in production environments, resolving issues within agreed SLAs.
- OS upgradation: Reinstalling servers from RHEL 6 to RHEL 7, RHEL 7 to RHEL 8, and RHEL 8 to RHEL 9 using the latest kickstart file (ISO image) from Satellite.
- OS patching and firmware upgrades over the ILO.
- NFS and CIFS share mounts. If any issues occur, fix them in a timely manner.
- Migrating production IPs and logical IPs from one server to another.
- Raising Red Hat cases and uploading SOS reports to find the root cause.
- Configuring RAID based on the request.
- Copying the files and directories from one server to another server by using RSYNC and SCP.
- Troubleshot and analyzed operating system issues to enhance overall system performance.
- Created and maintained user and group administration, managing permissions, and ownership settings.
- Implemented Access Control Lists (ACLs) to facilitate multi-user access to files and directories.
- Granted sudo access to the database, middleware, and other team members as required.
- Collaborated with the VMware team to provision disks for Linux servers efficiently.
- Configured disk management using LVM, optimizing data storage solutions.
- Managed package installations and updates using YUM and RPM, performing rollbacks when necessary.
- Monitored system performance to identify weaknesses, bottlenecks, and inefficiencies.
- Collaborated with cross-functional teams to design and deploy IT solutions aligned with business objectives.
IT Analyst
TCS
Bangalore
10.2023 - 03.2025
- Company Overview: VOLVO BANGALORE
- As a team member of Linux delivery providing 24/7 support to production environment and solving issues in agreed SLA.
- Having good experience in troubleshooting and analyzing skills on Operating systems issues.
- Having knowledge in User and group management.
- Having knowledge in File system permissions.
- Having knowledge in Configuring and secure open SSH.
- Fixing user unable to login related issues.
- Provide Linux server access to newly joined engineers.
- Granting sudo permissions to users using puppet.
- Performing patching using ansible.
- Managed Disks and File systems using LVM on Linux.
- Experience in Package management (RPMs & YUM).
- Scheduling of automatic repetitive Jobs with Crontab.
- Rising ticket with hardware vendor for any hardware problems.
- VOLVO BANGALORE
Senior Specialist
HCL
Bangalore
01.2022 - 09.2023
- Company Overview: Bandhan Bank, Kolkata
- As a team member of Linux delivery providing 24/7 support to production environment and solving issues in agreed SLA.
- Having good experience in troubleshooting and analyzing skills on Operating systems issues.
- Having knowledge in User and group management.
- Having knowledge in File system permissions.
- Having knowledge in Configuring and secure open SSH.
- Fixing user unable to login related issues.
- Provide Linux server access to newly joined engineers.
- Granting sudo permissions to users using puppet.
- Performing patching using ansible.
- Managed Disks and File systems using LVM on Linux.
- Bandhan Bank, Kolkata
Education
Master of Computer Application -
Nitte Meenakshi institute of technology
Bangalore, Karnataka07.2015
Bachelor of Computer Application -
Tapindu institute of higher studies
Magadh University07.2012
Skills
- RHEL 6, 7, 8, 9
- CentOS, Ubuntu, Solaris, Aix
- VMware vSphere, vCenter VMware Horizon Client
- ssh, ftp, nfs, samba, dns, dhcp
- AWS EC2 S3 snapshot IAM security group
- Tool: ServiceNow, Splunk, BMC Remedy, ManageEngine, Control-M
Disclaimer
I, Gyan, hereby declare that the information contained herein is true and correct to the best of my knowledge and belief.
Technical Summary
RHEL-6, RHEL-7, RHEL-8, CentOS, Ubuntu, Solaris, AWS (Amazon Web Services), VMware Vsphear, ControlM, BMC Remedy, Manage Engine, ServiceNow, Ansible, Puppet, SSH, FTP, NFS, SAMBA, DNS, HTTP
Timeline
Senior Associate Consultant
infosys
03.2025 - Current
IT Analyst
TCS
10.2023 - 03.2025
Senior Specialist
HCL
01.2022 - 09.2023
Master of Computer Application -
Nitte Meenakshi institute of technology
Bachelor of Computer Application -
Tapindu institute of higher studies