● MariaDB の バージョンを調べる

mysql -u root -p -e 'status'

もし Pleskをお使いの場合は

mysql -uadmin -p`sudo cat /etc/psa/.psa.shadow` -e 'status'

結果例

mysql  Ver 15.1 Distrib 10.1.36-MariaDB, for Linux (x86_64) using readline 5.1

Connection id:          33536
Current database:
Current user:           root@localhost
SSL:                    Not in use
Current pager:          stdout
Using outfile:          ''
Using delimiter:        ;
Server:                 MariaDB
Server version:         10.1.36-MariaDB MariaDB Server
Protocol version:       10
Connection:             Localhost via UNIX socket
Server characterset:    utf8mb4
Db     characterset:    utf8mb4
Client characterset:    utf8mb4
Conn.  characterset:    utf8mb4
UNIX socket:            /var/lib/mysql/mysql.sock
Uptime:                 36 days 16 hours 59 min 3 sec

Threads: 4  Questions: 3939177  Slow queries: 8  Opens: 8496  Flush tables: 1  Open tables: 152  Queries per second avg: 1.242

10.1.36　であることがわかります。