centos 安装mysql

你是root權限嗎？_操作系統的_

兩種方法
1 使用替換法，備份原來的data/mysql，用安裝檔的替換data/mysql。靠谱
2 用參數 --skip-grant-table ，啓動mysqld跳過授權表，全部連接的用戶均可完全控制mysql，比較危險。通常都是本機跳開network後使用這個方法。

centos 安装mysql记
下午没事，闲的蛋疼，刚搞了一个FTP的服务器，也是个摆设，平时不咋用。所以就想装个MYSQL学习学习。
yum install mysql 装好了，
运行mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)。有文章说是权限问题，后来把权限搞成777也不行。说是没启动MYSQL。那就启动吧
[root@localhost mysql]# service mysql start
mysql: unrecognized service
不行。。。网上也找不到个所以然来。说是用RC.D启动
/etc/rc.d/init.d/mysqld start
-bash: /etc/rc.d/init.d/mysqld: No such file or directory
依然不行。
后来找文章，有人是装的mysql-server.就把前面装的删了。删除用yum remove mysql  。YUM还是很方便的，呵呵。
再yum install mysql-server
装好了。启动
[root@localhost mysql]# service mysql start
mysql: unrecognized service
依旧。。。。。。。。
然后 /etc/rc.d/init.d/mysql 启动
/etc/init.d/mysqld start
Initializing MySQL database:  Installing MySQL system tables...
110112 15:24:06 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295
110112 15:24:06 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295
OK
Filling help tables...
110112 15:24:06 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295
110112 15:24:06 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295
OK
To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system
PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL 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 manual for more instructions.
You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe &
You can test the MySQL daemon with mysql-test-run.pl
cd mysql-test ; perl mysql-test-run.pl
Please report any problems with the /usr/bin/mysqlbug script!
The latest information about MySQL is available on the web at
http://www.mysql.com
Support MySQL by buying support/licenses at http://shop.mysql.com
                                                           [  OK  ]
Starting MySQL:                                            [  OK  ]
好了。。竟然。。。呵呵
加到自启动了吧。省的麻烦
chkconfig mysqld on
注意一下，这里是mysqld 不是mysql
运行一下mysql
[root@localhost /]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.0.77 Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

呵呵，好了！问题解决了！
再试试 [root@localhost mysql]# service mysqld restart
Stopping MySQL:                                            [  OK  ]
Starting MySQL:                                            [  OK  ]
都OK了！