By default, the Russian language in the console is displayed incorrectly because the encoding is not configured. To edit files in Russian in the console, you need to add support for it.

1. Installation

apt install locales

2. Setup

dpkg-reconfigure locales

Select from the list ru_RU.UTF-8 UTF-8

Next select ru_RU.UTF-8

Ready. For the settings to take effect, you must end the session and log into the console via ssh again.