What does this bDNhcm5fdGgzX3IwcDM1 mean? I think it has something to do with bases.

Run the following command in the terminal.

echo 'bDNhcm5fdGgzX3IwcDM1' | base64 -d

Engulf the output inside picoCTF{output}

But, let’s look a little deeper. The base64 command encodes binary strings into text representations using the base64 encoding format. So, base64 is just a format that is in a sense scrambled. The parameter -d just decodes from the base64 format to plain text, that we can read.

base64 - Sun OpenDS Standard Edition 2.0 Command-Line Usage Guide
This help set provides command-line reference information for the OpenDS directory server.
Sun OpenDS Standard Edition 2.0 Command-Line Usage Guide

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picoCTF CTF General Skills