linux mysql 解除安裝，安裝，測試全過程

 mysql解除安裝

yum remove mysql mysql-server mysql-libs compat-mysql51

rm -rf /var/lib/mysql

rm /etc/my.cnf

檢視是否還有mysql軟體：

rpm -qa|grep mysql

有的話繼續删除

mysql安裝

1>若本地沒有安裝包 可以考慮使用yum指令進行下載下傳

# yum -y install mysql-server

# yum -y install php-mysql

2>安裝後，mysql自動啟動，預設沒有使用者名和密碼，設定新密碼

#   /usr/bin/mysqladmin -u root password 'aaaaaa'

[root@luozhonghua ~]#   /usr/bin/mysqladmin -u root password 'aaaaaa'

/usr/bin/mysqladmin: connect to server at 'localhost' failed

error: 'can't connect to local mysql server through socket '/var/lib/mysql/mysql.sock' (2)'

check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!

解決：

2.1》/etc/rc.d/init.d/mysqld status 看看mysql是否已經啟動

3.2》service mysqld start

3>登入mysql

>mysql -u root -p

enter password:’aaaaaa’

4>賦權連接配接的主機

#grant select,insert,update,delete on *.* to [email protected]  identified by 'aaaaaa'

grant select,insert,update,delete on *.* to [email protected]  identified by 'aaaaaa';

5>更改預設字元集

# cp my-medium.cnf  /etc/my.cnf

在[client]下加入 default-character-set=utf8

在[mysqld]下加入 default-character-set=utf8

查找安裝路徑

rpm -qa | grep mysql

rpm -ql 包名

[root@luozhonghua charsets]# find /usr -name my-medium.cnf

/usr/share/doc/mysql-server-5.1.73/my-medium.cnf

/usr/share/mysql/my-medium.cnf

#6>設定mysql開機自啟動

# vi /etc/rc.local

加入如下一行

#/usr/share/mysql/mysql.server start

7>重新啟動mysql

# /etc/init.d/mysql restart

service mysqld restart

8>測試;

[root@luozhonghua ~]# mysql -u root -p

enter password:

welcome to the mysql monitor.  commands end with ; or \g.

your mysql connection id is 3

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> create database xxx

    -> ;

query ok, 1 row affected (0.06 sec)

mysql> ls

error 1064 (42000): you have an error in your sql syntax; check the manual th                                                                                at corresponds to your mysql server version for the right syntax to use near                        

                                                        'ls' at line 1

mysql> show databases

+--------------------+

| database           |

| information_schema |

| mysql              |

| test               |

| xxx                |

4 rows in set (0.06 sec)

mysql> use xxx;

database changed

mysql> show database

                                                        'database' at line 1

mysql> show databases;

4 rows in set (0.01 sec)

mysql> create table test(

    -> int id not null,

    -> varchar(20) name null);

                                                        'int id not null,

varchar(20) name null)' at line 2

mysql> show tables;

empty set (0.00 sec)

mysql> create table dbtest (

    -> id int ,

    -> name varchar);

                                                        ')' at line 3

    -> id int,

    -> name varchar(10));

query ok, 0 rows affected (0.07 sec)

+---------------+

| tables_in_xxx |

| dbtest        |

1 row in set (0.01 sec)

mysql> drop table xxx;

error 1051 (42s02): unknown table 'xxx'

mysql> drop table dbtest;

query ok, 0 rows affected (0.00 sec)

mysql>