[root@localhost ~]# /etc/init.d/mysql start
Starting MySQL.170430 23:07:56 mysqld_safe Logging to '/home/mysql/db/mianbao/localhost.localdomain.err'.
170430 23:07:56 mysqld_safe Starting mysqld daemon with databases from /home/mysql/db/mianbao
/usr/bin/mysqld_safe_helper: Can't create/write to file '/home/mysql/db/mianbao/localhost.localdomain.err' (Errcode: 2 "No such file or directory")
. ERROR!

[root@localhost mianbao]# tail -f localhost.localdomain.err
170430 23:08:57 [Note] InnoDB: Creating tablespace and datafile system tables.
170430 23:08:57 [Note] InnoDB: Tablespace and datafile system tables created.
170430 23:08:57 [Note] InnoDB: Waiting for purge to start
170430 23:08:57 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.35-80.0 started; log sequence number 0
170430 23:08:57 [Note] Plugin 'FEEDBACK' is disabled.
170430 23:08:57 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
170430 23:08:57 [ERROR] Can't open and lock privilege tables: Table 'mysql.servers' doesn't exist
170430 23:08:57 [Note] Server socket created on IP: '127.0.0.1'.
170430 23:08:57 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
170430 23:08:57 mysqld_safe mysqld from pid file /home/mysql/db/mianbao/localhost.localdomain.pid ended

初始化数据库，指定数据存储路径

[root@localhost mianbao]# mysql_install_db --user=mysql --datadir=/home/mysql/db/mianbao/
Installing MariaDB/MySQL system tables in '/home/mysql/db/mianbao/' ...
170430 23:14:18 [Note] /usr/sbin/mysqld (mysqld 10.0.30-MariaDB) starting as process 46784 ...
170430 23:14:18 [Note] InnoDB: Using mutexes to ref count buffer pool pages
170430 23:14:18 [Note] InnoDB: The InnoDB memory heap is disabled
170430 23:14:18 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
170430 23:14:18 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
170430 23:14:18 [Note] InnoDB: Compressed tables use zlib 1.2.3
170430 23:14:18 [Note] InnoDB: Using Linux native AIO
170430 23:14:18 [Note] InnoDB: Using CPU crc32 instructions
170430 23:14:18 [Note] InnoDB: Initializing buffer pool, size = 128.0M
170430 23:14:18 [Note] InnoDB: Completed initialization of buffer pool
170430 23:14:18 [Note] InnoDB: Highest supported file format is Barracuda.
170430 23:14:18 [Note] InnoDB: Log scan progressed past the checkpoint lsn 49463
170430 23:14:18 [Note] InnoDB: Database was not shutdown normally!
170430 23:14:18 [Note] InnoDB: Starting crash recovery.
170430 23:14:18 [Note] InnoDB: Reading tablespace information from the .ibd files...
170430 23:14:18 [Note] InnoDB: Restoring possible half-written data pages
170430 23:14:18 [Note] InnoDB: from the doublewrite buffer...
InnoDB: Doing recovery: scanned up to log sequence number 1600607
170430 23:14:18 [Note] InnoDB: Starting an apply batch of log records to the database...
InnoDB: Progress in percent: 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
InnoDB: Apply batch completed
170430 23:14:18 [Note] InnoDB: 128 rollback segment(s) are active.
170430 23:14:18 [Note] InnoDB: Waiting for purge to start
170430 23:14:18 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.35-80.0 started; log sequence number 1600607
170430 23:14:19 [Note] InnoDB: FTS optimize thread exiting.
170430 23:14:19 [Note] InnoDB: Starting shutdown...
170430 23:14:20 [Note] InnoDB: Waiting for page_cleaner to finish flushing of buffer pool
170430 23:14:22 [Note] InnoDB: Shutdown completed; log sequence number 1616707
OK
Filling help tables...
170430 23:14:22 [Note] /usr/sbin/mysqld (mysqld 10.0.30-MariaDB) starting as process 46814 ...
170430 23:14:22 [Note] InnoDB: Using mutexes to ref count buffer pool pages
170430 23:14:22 [Note] InnoDB: The InnoDB memory heap is disabled
170430 23:14:22 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
170430 23:14:22 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
170430 23:14:22 [Note] InnoDB: Compressed tables use zlib 1.2.3
170430 23:14:22 [Note] InnoDB: Using Linux native AIO
170430 23:14:22 [Note] InnoDB: Using CPU crc32 instructions
170430 23:14:22 [Note] InnoDB: Initializing buffer pool, size = 128.0M
170430 23:14:22 [Note] InnoDB: Completed initialization of buffer pool
170430 23:14:22 [Note] InnoDB: Highest supported file format is Barracuda.
170430 23:14:22 [Note] InnoDB: 128 rollback segment(s) are active.
170430 23:14:22 [Note] InnoDB: Waiting for purge to start
170430 23:14:22 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.35-80.0 started; log sequence number 1616707
170430 23:14:22 [Note] InnoDB: FTS optimize thread exiting.
170430 23:14:22 [Note] InnoDB: Starting shutdown...
170430 23:14:23 [Note] InnoDB: Waiting for page_cleaner to finish flushing of buffer pool
170430 23:14:25 [Note] InnoDB: Shutdown completed; log sequence number 1616717
OKTo start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your systemPLEASE REMEMBER TO SET A PASSWORD FOR THE MariaDB root USER !
To do so, start the server, then issue the following commands:'/usr/bin/mysqladmin' -u root password 'new-password'
'/usr/bin/mysqladmin' -u root -h localhost.localdomain password 'new-password'Alternatively you can run:
'/usr/bin/mysql_secure_installation'which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.See the MariaDB Knowledgebase at http://mariadb.com/kb or the
MySQL manual for more instructions.You can start the MariaDB daemon with:
cd '/usr' ; /usr/bin/mysqld_safe --datadir='/home/mysql/db/mianbao/'You can test the MariaDB daemon with mysql-test-run.pl
cd '/usr/mysql-test' ; perl mysql-test-run.plPlease report any problems at http://mariadb.org/jiraThe latest information about MariaDB is available at http://mariadb.org/.
You can find additional information about the MySQL part at:
http://dev.mysql.com
Consider joining MariaDB's strong and vibrant community:
https://mariadb.org/get-involved/[root@localhost mianbao]# /etc/init.d/mysql start
Starting MySQL.170430 23:14:34 mysqld_safe Logging to '/home/mysql/db/mianbao/localhost.localdomain.err'.
170430 23:14:34 mysqld_safe Starting mysqld daemon with databases from /home/mysql/db/mianbaoSUCCESS!