https://itsecforu.ru/2018/05/24/%D0%BA%D0%B0%D0%BA-%D0%BD%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B8%D1%82%D1%8C-sftp-%D1%81%D0%B5%D1%80%D0%B2%D0%B5%D1%80-mysecureshell-%D0%BD%D0%B0-ubuntu-18-04/