今天安装好了centos 6.5 32位系统，远程安装好了MySQL，进入mysql后，有事忘了退出来，当我想起来之后，远程已经断开连接，重新连接ssh，登录MySQL，输入密码提示错误，检查服务：service mysqld status
[root@localhost ~]# service mysqld status mysqld 已死，但是 subsys 被锁 [root@localhost ~]#
然后查询下资料，按照以下步骤：
[root@localhost ~]# service mysqld stop 停止 mysqld： [确定] [root@localhost ~]#
[root@localhost ~]# ps aux|grep mysql root 13690 0.0 0.0 6764 1420 ? S 04:10 0:00 /bin/sh /usr/bin/mysqld_safe --user=root --skip-grant-tables mysql 14708 0.0 0.7 135412 15024 ? Sl 04:26 0:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=root --skip-grant-tables --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock root 15558 0.0 0.0 6736 1412 pts/1 S 04:49 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --socket=/var/lib/mysql/mysql.sock --pid-file=/var/run/mysqld/mysqld.pid --basedir=/usr --user=mysql mysql 15660 0.0 0.6 80748 11840 pts/1 Sl 04:49 0:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock root 16107 0.0 0.0 5984 764 pts/1 S+ 04:51 0:00 grep mysql [root@localhost ~]#
[root@localhost ~]# [root@localhost ~]# kill -9 14708 //杀死mysql进程 [root@localhost ~]#
[root@localhost ~]# ps aux|grep mysql //mysql进程都关闭了 root 16170 0.0 0.0 5980 756 pts/1 S+ 04:53 0:00 grep mysql [root@localhost ~]# [root@localhost ~]# service mysqld status mysqld 已死，但是 subsys 被锁 [root@localhost ~]#
[root@localhost ~]# service mysqld restart //重启mysql服务，重新连接 停止 mysqld： [确定] 正在启动 mysqld： [确定] [root@localhost ~]#
[root@localhost ~]# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.1.73 Source distribution Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement. mysql> //连接成功，进入MySQL mysql> mysql> exit Bye [root@localhost ~]#
以下是网上参考资料：
今天在Red Hat Linux 9上面安装了MYSQL，但是在service mysql start以后，查看service mysql status的时候出现以下提示：
mysqld 已死，但是 subsys 被锁
我起初还看了日志文件，日志文件提示：
Cannot initialize InnoDB as ‘innodb_data_file_path‘ is not set.
If you do not want to use transactional InnoDB tables, add a line
skip-innodb
to the [mysqld] section of init parameters in your my.cnf
or my.ini. If you want to use InnoDB tables, add to the [mysqld]
section, for example,
innodb_data_file_path = ibdata1:10M:autoextend
But to get good performance you should adjust for your hardware
the InnoDB startup options listed in section 2 at
060806 12:51:01 /usr/libexec/mysqld: Incorrect information in file: ‘./mysql/host.frm‘
060806 12:51:01 mysqld ended
我把原版的英文发给大家看看：
1. Obviously the ‘ole check the log file for anything nasty
cat /var/log/mysqld.log
2. Stop the service
service mysqld stop
3. Check to see if the service stopped, it might be calling the wrong pid.
ps aux | grep mysql
4. Kill any mysql process that might still be running.
kill -9 ??? ???
5. (*CAREFUL*) Remove/move/backup any databases from the data directory, only do this step if you need to.
rm -Rf /var/lib/mysql/*
6. Check your global options configuration file, should be similar to stevanbt‘s initial post.
cat /etc/my.cnf
7. Copy over one of the preconfigured ‘sample‘ server-specific options file. Global (/etc/my.cnf) file has priority over server-specific file, but these have more options in them and have been tuned for a certain role.
cp /usr/share/doc/mysql-server-?.??.??/my-small.cnf /var/lib/mysql
8. Recreate the initial databases, this step is optional as the initscripts will do this anyway.
mysql_install_db
9. Check and set the runlevels for the service.
chkconfig --level 345 mysqld on
chkconfig --list mysqld
10. Start the service.
service mysqld start
11. Check the log file (step 1)
Thats just a basic step through check, most of you have probably already done this.
其实做到step 9问题都已经解决了。
centos6.5安装MYSQL“mysqld已死，但是subsys被锁”的解决方案
原文地址：http://1234x.blog.51cto.com/3884036/1608130
