Открываем терминал Ctrl+Alt+T, и пишем следующие команды:

Добавляем ключ репозитория:

sudo apt install apt-transport-https curl

sudo mkdir -p /etc/apt/keyrings

sudo curl -o /etc/apt/keyrings/mariadb-keyring.pgp 'https://mariadb.org/mariadb_release_signing_key.pgp'

Добавляем репозиторий:

sudo nano /etc/apt/sources.list.d/mariadb.sources

# MariaDB 12.1 repository list - created 2025-09-21 07:23 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.rc/debian
URIs: https://mirror.docker.ru/mariadb/repo/12.1/debian
Suites: trixie
Components: main
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

# MariaDB 11.8 repository list - created 2025-09-21 07:22 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.8/debian
URIs: https://mirror.docker.ru/mariadb/repo/11.8/debian
Suites: trixie
Components: main
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

# MariaDB 12.1 repository list - created 2025-09-21 07:26 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.rc/debian
URIs: https://mirror.docker.ru/mariadb/repo/12.1/debian
Suites: bookworm
Components: main
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

# MariaDB 11.8 repository list - created 2025-09-21 07:15 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.8/debian
URIs: https://mirror.docker.ru/mariadb/repo/11.8/debian
Suites: bookworm
Components: main
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

# MariaDB 11.4 repository list - created 2025-07-11 05:12 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.4/debian
URIs: https://mirror.docker.ru/mariadb/repo/11.4/debian
Suites: bookworm
Components: main
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

# MariaDB 11.8 repository list - created 2025-12-08 05:41 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.8/ubuntu
URIs: https://mirror.docker.ru/mariadb/repo/11.8/ubuntu
Suites: noble
Components: main main/debug
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

# MariaDB 11.4 repository list - created 2025-12-08 05:36 UTC
# https://mariadb.org/download/
X-Repolib-Name: MariaDB
Types: deb
# deb.mariadb.org is a dynamic mirror if your preferred mirror goes offline. See https://mariadb.org/mirrorbits/ for details.
# URIs: https://deb.mariadb.org/11.4/ubuntu
URIs: https://mirror.docker.ru/mariadb/repo/11.4/ubuntu
Suites: noble
Components: main main/debug
Signed-By: /etc/apt/keyrings/mariadb-keyring.pgp

Обновляем список пакетов в репозиториях:

sudo apt update

Устанавливаем MariaDB:

sudo apt install mariadb-server mariadb-client

Добавляем MariaBD в автозагрузку:

sudo systemctl enable mariadb

Смотрим статус MariaBD:

sudo systemctl status mariadb

Перезапуск MariaBD:

sudo systemctl restart mariadb