MySQL is not running, but lock file (/var/lock/subsys/mysql) exists
存在這個問題的一般是由三個原因決定的：
1：配置中的一些文件權限不夠，將所有的配置中涉及到的文件全部修改爲mysql用戶權限
2：mysql運行的pid沒有，rm -rf /var/lock/subsys/mysql ，重新創建新的pid文件默認的權限爲660
3：my.cnf配置文件錯誤，需要重新修改
Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
這個問題是由於myql存放文件中沒有系統自帶的數據庫可以輸入mysql_install_db
或者將數據庫的路徑重新修改爲默認的/var/lib/mysql的目錄下面
下面貼出我自己的mariadb的配置（從數據庫）
[client]
port = 3306
socket = /var/lib/mysql/mysql.sock
default-character-set=utf8
[mysqld_safe]
socket = /var/lib/mysql/mysql.sock
nice = 0
[mysqld]
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/lib/mysql/mysql.sock
log_error = /var/log/mysqld/error.log
port = 3306
basedir = /usr
datadir = /data
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
bind-address = 0.0.0.0
skip-name-resolve
lower_case_table_names = 1
max_connections = 1000
connect_timeout = 15
wait_timeout = 600
max_allowed_packet = 16M
thread_cache_size = 128
sort_buffer_size = 16M
bulk_insert_buffer_size = 16M
tmp_table_size = 128M
max_heap_table_size = 128M
query_cache_limit = 0
query_cache_size = 0
long_query_time = 10
log_bin = /var/log/mysqld/mysql-bin
log_bin_index = /var/log/mysqld/mysql-bin.index
expire_logs_days = 10
max_binlog_size = 100M
binlog_ignore_db=mysql
server_id=5005
log_slave_updates=1
slave_skip_errors=all
#auto_increment_offset=1
###auto_increment_increment=2
#binlog_format=row
#
##
##replicate-do-db=
#key_buffer_size = 1024M
##
#
#collation-server = utf8_general_ci
#init-connect='SET NAMES utf8'
#character-set-server = utf8
#
#default_storage_engine = InnoDB
#innodb_buffer_pool_size = 30720M
#innodb_log_buffer_size = 32M
#innodb_file_per_table = 1
#innodb_open_files = 400
#innodb_io_capacity = 400
#innodb_flush_method = O_DIRECT
#innodb_flush_log_at_trx_commit = 2
#innodb_log_file_size = 512M
#
#key_buffer = 16M
#thread_stack = 192K
#myisam-recover = BACKUP
#
#[mysqldump]
#quick
#quote-names
#max_allowed_packet = 16M
#
#[isamchk]
#key_buffer = 16M
##