I work with
Dinfosec is my personal technical brand: practical IT support, training and technical services, backed by 4 years of hands-on experience in Linux administration and infrastructure support.
I'm a Linux and infrastructure professional with 4 years of experience in IT, mainly in Linux system administration and infrastructure support.
My day-to-day work covers server administration and troubleshooting, OS patching, storage management, server provisioning, virtualization and monitoring. I care about doing the basics properly: stable servers, safe changes, clear documentation.
Dinfosec is where I share that experience: helping individuals and small businesses with Linux/IT support, and helping people learn IT and cybersecurity in a practical, no-jargon way.
$ whoami
kalaiyarasan — Linux & Infrastructure
$ cat experience.txt
4 years · IT / Linux administration
$ cat offers.txt
support · troubleshooting · training
$
Day-to-day administration, troubleshooting and server provisioning.
Managing and expanding disks safely without surprises.
OS patching, security updates, hardening and basic cybersecurity.
AWS fundamentals plus on-premise virtualization platforms.
Reducing repetitive work with scripts and configuration management.
Web servers and infrastructure monitoring and support.
Freelance and project-based help, delivered directly by me.
Ongoing or one-off help with server administration, patching, provisioning and monitoring.
Something broken or misbehaving? Diagnosis and a fix, with a clear explanation of what went wrong.
Practical advice on setup, storage, virtualization, basic AWS and security hardening before you build.
Hands-on, plain-language sessions based on real infrastructure work.
For students, career starters and IT staff who want real-world skills.
For teams and individuals who want to be safer online and at work.
Guides, cheat sheets and small tools I write for self-learners, free to use.
Browse Blog & Tools →4 years working with real servers, storage, patching and infrastructure support.
No ticket queues or hand-offs. I'm the person who does the work.
Clear explanations, safe changes and honest scoping, including telling you when something is outside what I do.
Need support, advice or training? Send a message and I'll reply personally.
Tell me briefly what you need and I'll get back to you.
