Level10

Level Goal

The password for the next level is stored in the file data.txt, which contains base64 encoded data.

Solution

Base 64 is a binary-to-text encodig scheme. The base64 utility is used for the encoding/decoding of data from the command line. The -d flag is telling the utility to decode the base64 encoded data in the data.txt file. See the base64 man page for further reading.