Alors syslog m'informe :
Bien, en attendant, je vais voir ce que je peux trouver comme solution !Jul 18 16:17:48 siou mysqld_safe: Starting mysqld daemon with databases from /var/lib/mysql
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] /usr/sbin/mysqld (mysqld 10.1.14-MariaDB-1~trusty) starting as process 171705 ...
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Warning] Can't create test file /var/lib/mysql/siou.lower-test
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] mysqld: File '/var/lib/mysql/aria_log_control' not found (Errcode: 13 "Permission denied")
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] mysqld: Got error 'Can't open file' when trying to use aria control file '/var/lib/mysql/aria_log_control'
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] Plugin 'Aria' init function returned error.
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] Plugin 'Aria' registration as a STORAGE ENGINE failed.
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Using mutexes to ref count buffer pool pages
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: The InnoDB memory heap is disabled
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Memory barrier is not used
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Compressed tables use zlib 1.2.8
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Using Linux native AIO
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Using generic crc32 instructions
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Initializing buffer pool, size = 256.0M
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] InnoDB: Completed initialization of buffer pool
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] InnoDB: ./ibdata1 can't be opened in read-write mode
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] InnoDB: The system tablespace must be writable!
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] Plugin 'InnoDB' init function returned error.
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [Note] Plugin 'FEEDBACK' is disabled.
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] Unknown/unsupported storage engine: InnoDB
Jul 18 16:17:49 siou mysqld: 2016-07-18 16:17:49 140445778970560 [ERROR] Aborting
Jul 18 16:17:49 siou mysqld:
Jul 18 16:17:49 siou mysqld_safe: mysqld from pid file /var/run/mysqld/mysqld.pid ended
Jul 18 16:18:50 siou /etc/init.d/mysql[172271]: 0 processes alive and '/usr/bin/mysqladmin --defaults-file=/etc/mysql/debian.cnf ping' resulted in
Jul 18 16:18:50 siou /etc/init.d/mysql[172271]: #007/usr/bin/mysqladmin: connect to server at 'localhost' failed
Jul 18 16:18:50 siou /etc/init.d/mysql[172271]: error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2 "No such file or directory")'
Jul 18 16:18:50 siou /etc/init.d/mysql[172271]: Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists!