// Fazla Rabby Azim Β· Tech Blog

Insights & Tutorials

Deep dives into Linux, Cloud, Networking, Security and DevOps from the trenches.

πŸ—‚ All Posts (9) 🐧 Linux & Unix (1) ☁️ Cloud & DevOps (2) 🌐 Networking (1) πŸ”’ Security (4) βš™οΈ Scripting & Tools (1)
Zero-Downtime CI/CD to a Plain Ubuntu VPS with GitHub Actions (No Docker Required)

Zero-Downtime CI/CD to a Plain Ubuntu VPS with GitHub Actions (No Docker Required)

A complete guide to automated deployments for apps that run as a systemd service behind Nginx: build on GitHub Actions, deploy over SSH, run database migrations, and never touch a…

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⭐ Featured
🐧 Linux & Unix

10 Essential Linux Commands Every SysAdmin Must Know

Master these 10 Linux commands to dramatically speed up your daily system administration tasks. From process management to disk analysis, these are the building blocks of every great sysadmin.

πŸ“… Jun 26, 2026 ⏱ 8m
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⭐ Featured
☁️ Cloud & DevOps

How I Migrated 80 VMs to AWS with Zero Downtime

A step-by-step account of how I migrated 80 virtual machines from on-premises VMware to AWS EC2, achieving zero production downtime using a blue/green strategy.

πŸ“… Jun 26, 2026 ⏱ 12m
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πŸ”’ Security

How to create DKIM record

Adding DKIM record on cPanel​A Domain Keys Identified Mail (DKIM) record is a TXT record that adds digital cryptographic signatures to email messages. DKIM ensures that the email comes from a reliabl…

πŸ“… Jul 22, 2026 ⏱ 2m
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πŸ”’ Security

How to create DKIM record

Adding DKIM record on cPanel​A Domain Keys Identified Mail (DKIM) record is a TXT record that adds digital cryptographic signatures to email messages. DKIM ensures that the email comes from a reliabl…

πŸ“… Jul 22, 2026 ⏱ 2m
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πŸ”’ Security

How to create DKIM record

Adding DKIM record on cPanel​A Domain Keys Identified Mail (DKIM) record is a TXT record that adds digital cryptographic signatures to email messages. DKIM ensures that the email comes from a reliabl…

πŸ“… Jul 22, 2026 ⏱ 2m
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How to create DKIM record
πŸ”’ Security

How to create DKIM record

Adding DKIM record on cPanel​A Domain Keys Identified Mail (DKIM) record is a TXT record that adds digital cryptographic signatures to email messages. DKIM ensures that the email comes from a reliabl…

πŸ“… Jul 22, 2026 ⏱ 2m
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How to Setup SSH Key on Linux

Secure Shell (SSH) is an encrypted key used by Linux users to connect to remote servers.Normally, two ways users can access to their servers – password based authentication or public k…

πŸ“… Jul 8, 2026 ⏱ 8m
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Domain Isolation Proxy – A Security & Branding Solution for Multi-Client SaaS Platforms
☁️ Cloud & DevOps

Domain Isolation Proxy – A Security & Branding Solution for Multi-Client SaaS Platforms

πŸ“… Jul 6, 2026 ⏱ 1m
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