Ubuntu — LC_ALL is not set in ENV, set to ru_RU.UTF-8

Правим ошибку в Ubuntu 18.04:

LC_ALL is not set in ENV, set to ru_RU.UTF-8

или

warning: setlocale: LC_ALL: cannot change locale (ru_RU.UTF-8): No such file or directory

В файл /etc/default/locale добавляем строку:

LC_ALL="ru_RU.UTF-8"

Я встретился с ней при попытке запуска скрипта для Seafile.

Для Seafile:

Seafile — LC_ALL is not set in ENV, set to en_US.UTF-8