linux 安装mysql

rpm -qa|grep mysql
或者
rpm -qa | grep -i mysql

rpm -e mysql-libs --nodeps
或者
yum remove mysql*

命令卸载mysql及相关组件

MySQL-client-5.6.35-1.el6.x86_64.rpm

MySQL-devel-5.6.35-1.el6.x86_64.rpm

MySQL-server-5.6.35-1.el6.x86_64.rpm

# rpm -ivh MySQL-server-5.6.35-1.rhel5.x86_64.rpm
# rpm -ivh MySQL-devel-5.6.35-1.rhel5.x86_64.rpm

# rpm -ivh MySQL-client-5.6.35-1.rhel5.x86_64.rpm

#修改配置文件位置

# cp /usr/share/mysql/my-default.cnf /etc/my.cnf

#yum -y remove mysql-libs-5.1*

# /usr/bin/mysql_install_db

# service mysql start

# cat /root/.mysql_secret  #查看root账号密码

# The random password set for the root user at Wed Dec 11 23:32:50 2013 (local time): qKTaFZnl

# mysql -uroot –pqKTaFZnl

mysql> SET PASSWORD = PASSWORD(‘123456‘);    #设置密码为123456

mysql> exit

# mysql -uroot -p123456

mysql> use mysql;

mysql> select host,user,password from user;

+-----------------------+------+-------------------------------------------+
| host                  | user | password                                  |

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

| localhost             | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| localhost.localdomain | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |

| 127.0.0.1             | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |

| ::1                   | root | *1237E2CE819C427B0D8174456DD83C47480D37E8 |

+-----------------------+------+-------------------------------------------+
mysql> update user set password=password(‘123456‘) where user=‘root‘;

mysql> update user set host=‘%‘ where user=‘root‘ and host=‘localhost‘;

mysql> flush privileges;

mysql> exit

# chkconfig mysql on

# chkconfig --list | grep mysql

mysql           0:off   1:off   2:on    3:on    4:on    5:on    6:off

/var/lib/mysql/               #数据库目录

/usr/share/mysql              #配置文件目录

/usr/bin                     #相关命令目录

/etc/init.d/mysql              #启动脚本

client]  
password        = 123456  
port            = 3306  
default-character-set=utf8  
[mysqld]  
port            = 3306  
character_set_server=utf8  
character_set_client=utf8  
collation-server=utf8_general_ci  
#(注意linux下mysql安装完后是默认：表名区分大小写，列名不区分大小写； 0：区分大小写，1：不区分大小写)  
lower_case_table_names=1  
#(设置最大连接数，默认为 151，MySQL服务器允许的最大连接数16384; )  
max_connections=1000  
[mysql]  
default-character-set = utf8  

show variables like ‘%collation%‘;

show variables like ‘%char%‘;

启动服务

/etc/init.d/mysql start

停止服务
# /etc/init.d/mysql stop