DevOps

Saikat Mondal August 8, 2026 No Comments

How Nginx Reverse Proxy Works: An Ultimate Guide

Have you ever wondered how a website like https://app.example.com can connect to an application running on localhost:8080 with nginx? Indeed, nginx reverse proxy comes into…

Sushovan Mukherjee September 1, 2024 No Comments

Create a wildcard domain certificate from LetsEncrypt

To generate a wildcard domain certificate, you can use docker. It’s my first choice because we don’t have to install additional software; all will be…

Sushovan Mukherjee September 1, 2024 No Comments

Watch a website’s HTTP status code

Sometimes, during system administration or web application repair, we had to watch the status code it returned. To check a website’s status code, you can…

Sushovan Mukherjee August 25, 2024 No Comments

How to fix too many open files problem in Linux

System Administrators might have encountered the problem of “Too many open files” when dealing with dedicated web servers. But you can see that the file…

Souvik Saha Choudhury August 17, 2024 No Comments

How to restart Azure Data Factory scheduled trigger after subscription cancellation

I encountered an issue regarding the Azure Data Factory scheduled trigger stopped after the subscription cancellation. The following steps can restart your scheduled trigger. First,…

Souvik Saha Choudhury July 27, 2024 No Comments

How to check Azure Key Vault Secret Expiry using Log Analytics Workspace

Requirements Azure Key Vault Log Analytics Workspace Solution First, you need to create Azure Key Vault and Log Analytics Workspace but that is not part…

Sushovan Mukherjee July 27, 2024 No Comments

How to check domain SSL certificate expiry with PowerShell

Suppose you have multiple domains and need a script to check the SSL certificate validity with one script. Then, you can use that script in…

Souvik Saha Choudhury July 20, 2024 No Comments

How to check Azure Service Health

Go to Azure portal. Search “service health” in the search bar and go to the link “Service Health”. Check Service issues for your region. If…

Sushovan Mukherjee July 20, 2024 No Comments

How to handle CNAME flattening problem for APEX Domains

You might have heard many DNS providers don’t support CNAME flattening for root (APEX) domains. Now, there are many questions: What’s the problem? It’s good.…

Sushovan Mukherjee July 17, 2024 No Comments

Where to store SSH key in Azure

You can create an SSH key pair with SSH keys from the Azure portal. However, it will save only the public key, not the private…

+91 943 331 9991