我的 MySQL 守护进程似乎有问题，并且忽略了全局可写配置文件：S
这是我以用户 mysql 运行 mysqld 时的输出：
bash-4.2$ mysqld
Warning: World-writable config file '/etc/mysql/my.cnf' is ignored
120730 17:57:34 [Note] Plugin 'FEDERATED' is disabled.
120730 17:57:34 InnoDB: The InnoDB memory heap is disabled
120730 17:57:34 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120730 17:57:34 InnoDB: Compressed tables use zlib 1.2.5
120730 17:57:34 InnoDB: Using Linux native AIO
120730 17:57:34 InnoDB: Initializing buffer pool, size = 128.0M
120730 17:57:34 InnoDB: Completed initialization of buffer pool
InnoDB: Unable to lock ./ibdata1, error: 11
这是我的“my.cnf”文件内容：
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
[mysqld]
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/mysql
tmpdir = /tmp
key_buffer = 16M
thread_stack = 128K
thread_cache_size = 8
#max_connections = 100
#table_cache = 64
#thread_concurrency = 10
query_cache_limit = 1M
query_cache_size = 1024M
sort_buffer=512M
thread_concurrency=32
query_cache_type=2
tmp_table_size=1G
#log = /var/log/mysql/mysql.log
#log_slow_queries = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#skip-innodb
# chroot = /var/lib/mysql/
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 16M
真的不知道去哪里，有人知道如何用 mysqld 输出详细错误吗？或者更好的如何解决这个问题？有任何想法吗？多谢你们 ：）
好的，全局可写配置文件已解决，我现在需要帮助解决这些错误：
bash-4.2$ mysqld
120730 18:18:23 [Warning] Can't create test file /var/mysql/ks23085.lower-test
120730 18:18:23 [Warning] Can't create test file /var/mysql/ks23085.lower-test
120730 18:18:23 [Note] Plugin 'FEDERATED' is disabled.
mysqld: Table 'mysql.plugin' doesn't exist
120730 18:18:23 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
120730 18:18:23 InnoDB: The InnoDB memory heap is disabled
120730 18:18:23 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120730 18:18:23 InnoDB: Compressed tables use zlib 1.2.5
120730 18:18:23 InnoDB: Using Linux native AIO
120730 18:18:23 InnoDB: Initializing buffer pool, size = 128.0M
120730 18:18:24 InnoDB: Completed initialization of buffer pool
120730 18:18:24 InnoDB: Operating system error number 13 in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'create'.
InnoDB: Cannot continue operation.
我不知道这是否与目录未被正确允许或其他原因有关，还是与上次相同的问题？:S