Forem: Dev Power

How to use MFA with AWS CLI using Yubikey

Dev Power — Thu, 09 Feb 2023 10:06:27 +0000

How to use MFA with AWS CLI using Yubikey

While resetting my IAM keys, I realized I had all those powerful keys lying in plaintext in the credentials file.

Even though it requires access to my laptop, I wanted to have some extra security. As a big fan of MFA, I decided to enforce MFA with Yubikey while using CLI.

Here's the full article and step-by-step guide:

https://cloudinternals.net/aws/how-to-use-mfa-with-aws-cli-using-yubikey/

You will need to have a Yubikey to be able to follow the article, though.

I hope it helps others as well.

How to rotate AWS Access Keys with PowerShell

Dev Power — Thu, 09 Feb 2023 10:05:22 +0000

I'm still recovering from the LastPass breach. Because my IAM keys were in LP, I had to go through all of them and replace them.

As I had multiple keys to be replaced, I created a Powershell script to replace all the keys in my AWS credentials file.

The article explaining the script is here:

https://cloudinternals.net/aws/how-to-rotate-aws-access-keys-with-powershell/

I hope it comes in handy to other people too.

Migrate YouTube Subscriptions into Another Account with C#

Dev Power — Sat, 10 Sep 2022 10:41:09 +0000

If you have multiple YouTube accounts and looking for a way to import your subscriptions into another account, you can implement it yourself by following this tutorial:

The key takeaways:

Don't forget to revoke your token before switching to the destination account
I'd rather use service accounts to avoid all the manual approvals but they don't seem to work with YouTube
Nothing beats solving a problem with your own code 💪

How to Develop an Interactive CLI with C# to Manage SendGrid Dynamic Email Templates

Dev Power — Tue, 05 Jul 2022 09:26:40 +0000

I like developing my own CLIs and installing them using the dotnet tool command. I can then use them to make some manual tasks easier for myself. Recently I started playing with SendGrid Dynamic Email Templates. They have a great user interface but I wanted to do things programmatically.

I used CliFx before and was already familiar with how fast you can develop a CLI. The fun part of this project was to make the CLI interactive by using the Sharprompt library.

It basically works like this:

If you're interested in expanding on it, you can find the source code here. It's open-source so feel free to clone and play around.

I also wrote a step-by-step article (quite long though) to explain how all the tools work together here

Discovered a NuGet package called ClosedXML. Takes away the pain of dealing with OpenXML

Dev Power — Wed, 01 Jun 2022 13:03:55 +0000

As title says, it's a great package that simplifies dealing with Excel files.

It's open-source: https://github.com/ClosedXML/ClosedXML

I created a sample CLI to create a spreadsheet to track daily electricity costs for demo purposes: https://github.com/Dev-Power/programmatically-manage-excel-spreadsheets-with-dotnet/tree/main

You can also find the accompanying blog post for more details: https://devpower.co.uk/dotnet/csharp/programmatically-manage-excel-spreadsheets-with-dotnet/

Exploring Chart.js with Star Wars data

Dev Power — Mon, 30 May 2022 04:38:02 +0000

While exploring Chart.js, I created a simple project and wrote a blog post to accompany it:

https://devpower.co.uk/javascript/exploring-chartjs-with-star-wars-data/

The fun part was to use Star Wars API and dynamic data coming from an API with the charts. In most examples, I saw hard-coded data was used so I thought it might be useful to explore how to use some data coming from an API.

TL;DR:

Chart.js is a very easy to use, well-documented and open-source charting library.: https://www.chartjs.org/
Star Wars API is quite fun to play around with to get some SW trivia. Too bad it's not open source though: https://swapi.dev

Developing and installing your own CLI with dotnet tool and CliFx NuGet package

Dev Power — Mon, 30 May 2022 04:37:02 +0000

I wrote a blog post on developing and installing your own CLI with dotnet tool and CliFx NuGet package. You can find it here:

https://devpower.co.uk/dotnet/csharp/develop-a-cli-with-csharp/

If you're not interested in the whole thing, here is the TL;DR version:

dotnet tool is a mechanism to install/update/distribute console applications via NuGet packages
CliFx is an awesome NuGet package that allows you to convert a console application into a full-blown CLI with commands, subcommands, arguments and auto-generated usage message.

You can check out the references to find more about these: