How to fix: "Setting locale failed."

In different situations (for example, during the installation of Perl applications, or when I use apt-get install) I get the following warning message:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LC_CTYPE = "UTF-8",
    LANG = "ru_RU.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory

How to fix: CodeMirror editor is not loading content until clicked

I am used CodeMirror 5 in different projects. Now I using it with WordPress plugin API and it’s working perfectly except that the editor is not loading all content until clicked. Nothing appears below line 26 until you click the mouse below that line. The content is there, but it is not visible. It just comes up as a large blank white space. If you click above it, it doesn’t appear, you need to click below it.

Increasing the upload_max_filesize

The default upload file size for php (and, consequently, for WordPress) is 2 MB, which is a problem if you want to upload a files that’s bigger. Follow these steps if you get this message:

The uploaded file exceeds the upload_max_filesize directive in php.ini

Add social media buttons to your website

The social media buttons lets you add icons of the popular social networks which are linked to your social media profiles. You will learn how to add a vertical and horizontal line or lines of social media buttons to your website’s post, sidebar or footer, using whatever icons you prefer.

WP Plugin: "My Custom Styles"

An easy to use, with intuitive interface, WordPress plugin that gives you the ability to easily and safely add your custom CSS code to your WordPress website, directly out of your WordPress Admin Area, without the need to have an external editor.