shell - using rot13 and tr command for having an encrypted email address

Question

I have read many tutorials on the internet about the usage of the 'tr' command. However, I am not able to understand how to encrypt an email address with a shell script shift the characters using rot13. Can any one give a link or an example?

Answer 1

Not sure exactly how you want to use this, but here's a basic example to get you started:

echo 'fooman@example.com' | tr 'A-Za-z' 'N-ZA-Mn-za-m'

To make it easier, you can alias the tr command in your .bashrc file thusly:

alias rot13="tr 'A-Za-z' 'N-ZA-Mn-za-m'"

Now you can just call:

echo 'fooman@example.com' | rot13