How to Base64 Encode/Decode in Ubuntu command line

There are many situations where we need to get a Base64 Encoded string or a decode an already encoded string.

We can use the Linux command line to achieve this easily.

Encode a String: 

To Encode the string "admin:admin" we can use the following command.

echo -n 'admin:admin' | base64

This would give a result similar to the following.

YWRtaW46YWRtaW4= 

Decode a String:

To Decode the string "YWRtaW46YWRtaW4=" we can use the following command.

echo "YWRtaW46YWRtaW4=" | base64 --decode

This would give a result similar to the following

admin:admin