Problem with installment of Common Lisp requirements

I am trying to learn common lisp and following the installation process from https://lisp-lang.org/learn/getting-started/

The website says to add something to my ~/.emacs file, but I do not find it. Does someone now where I can find that?

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Seems like you want to install a custom slime to use Common Lisp on Linux. Maybe one should install it from a given distribution, it would be easier.

I would suggest the following steps:

1. Setup Emacs to use MELPA repository:

M-x customize-variable

Customize Variable: package-archives

Then, simply add melpa with the URL https://melpa.org/packages

Then press the button Apply and Save.

2. Install slime from the package manager

M-x list-packages

Search for slime, press i for install and then press x to proceed. You should have a proper version of slime installed.

3. Happily hack Common Lisp!

EDIT:

I missed this installation method that you probably followed. In this case, I believe that the init directory has a typo and is missing a dot (.)

(load (expand-file-name "~/.quicklisp/slime-helper.el"))
                           ^
                           \---- HERE
(setq inferior-lisp-program "sbcl")