What does the @ symbol mean at the end of a filename?

Question

linux

I'm trying to compile ICU, as indicated here:
light-code.ru/blog/post/update-icu-in-ubuntu
There is an item

5. It remains to connect intl.so to php.ini, for this we go to /etc/php5/apache2/conf.d and add the connection file 20-intl.ini

How to create a "connection file"?
Opened the folder /etc/php5/apache2/conf.d through vi, there is a "@" symbol at the end of the names of all files

Answer 1

This means that the file is a symbolic link .
And enter everything that is written in your link there.