help needed

Do you have any trace of the error o more details in the logs?

In the site only see an error page and redirects to the index.

With more details we can see the source of the error.

Dear Agustin,

I solved that problem: The “^D” in the book meant “control D” not “character^D”. But now I have another problem.

*% cd sample*
I am very rusty on these old
command line interfaces, but
I finally got there.
*% ruby eval.rb*
This worked.
*ruby> a = "Hello, world!"*
This worked, thusly:
*"Hello, world!"*
But when I tried this:
*ruby> puts a*
I got this:
ERR: undefined local variable or method 'a' for