Practical Guides for Sysadmins: Linux, Windows, Networking & DevOps
Step-by-step tutorials, troubleshooting checklists and plain-English explainers for people who run servers, networks and desktops.
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Popular Troubleshooting Guides
- Fix “wmic is not recognized” on Windows 11
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- MySQL/MariaDB Connection Refused: Checklist That Fixes It
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- DNS Not Resolving on Linux: Checklist That Actually Works
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A defensive Linux privilege-escalation audit with real output: sudo rules, SUID and SGID files, capabilities, root-equivalent groups, writable cron paths and patch level.
Hi, I’m Maruthi Vishnu
I’m a Systems Administrator and DevOps Engineer with 7+ years of hands-on IT experience. Started my career at Revalsys Technologies as a System Administrator — managing Windows Server, Active Directory and enterprise infrastructure. Then deepened my sysadmin expertise at vSplash Techlabs, before moving into DevOps and Cloud at Ratnam Solutions Private LTD where I work with AWS infrastructure today. sysadmin.co.in is where I document everything I learn, break, and build — so you don’t have to figure it out the hard way.
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