Rajesh Raj Pathak System Administrator
Knowledge Sharing

Technical Insights & Experience

Practical notes, specialized ISP guides, and system administration reflections gathered over two decades of operation.

VLAN Segmentation May 12, 2026
#13

VLAN Segmentation

Organizing complex ISP networks for easier troubleshooting and security.

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IP Address Pool Management May 10, 2026
#14

IP Address Pool Management

Maximizing public IP efficiency with CGNAT and careful allocation.

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Customer Support Automation May 08, 2026
#15

Customer Support Automation

Building technical tools to help support teams diagnose connectivity issues.

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CentOS to Rocky Linux Migration May 06, 2026
#16

CentOS to Rocky Linux Migration

A seamless transition path for production hosting environments.

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Automating Backups with Restic May 04, 2026
#17

Automating Backups with Restic

Implementing encrypted, de-duplicated backups to offsite storage.

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Linux Kernel Tuning for Web Servers May 02, 2026
#18

Linux Kernel Tuning for Web Servers

Optimizing sysctl parameters for high-concurrency traffic.

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