I\'m experiencing a problem regarding Moodle.
I\'ve made an install into a Linux server, but CSS and themes are not displaying so i have only plain text.
Ho
It seems that you are viewing the moodle with standard theme.
By default in moodle the standard theme would be applied. You can choose any other theme which is available under the theme section.
To change the theme, you will to have access the theme section page as admin.
Administration > Site administration > Appearance > Themes > Theme Selector
After select any other theme, you will have to do purge all cache.
For more information about changing the theme: Change moodle theme