CentOS安装mysql

查看是否安装过mysql

rpm -qa | grep mysql

 

下载mysql

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

也可以直接到mysql官网选择其他版本进行下载。

一、解压安装包

tar -zxvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

 

 修改解压后的文件名

mv mysql-5.7.24-linux-glibc2.12-x86_64 mysql

 

二 安装Mysql

 

1)、创建mysql用户

useradd mysql

 

2)、mysql目录改为mysql读写权限

chown -R mysql:mysql /usr/local/mysql

 

3)初始化数据库

cd mysql

mkdir data

bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --lc_messages_dir=/usr/local/mysql/share --lc_messages=en_US

这一步会生成一个临时密码，保存着，下面用

 

4)编辑mysql配置文件

vi /etc/my.cnf

[mysqld]

basedir=/usr/local/mysql

datadir =/usr/local/mysql/data

port=3306

max_connections=400

symbolic-links=0

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

lower_case_table_names=1

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

federated

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

# Settings user and group are ignored when systemd is used.

# If you need to run mysqld under a different user or group,

# customize your systemd unit file for mariadb according to the

# instructions in http://fedoraproject.org/wiki/Systemd

 

[mysqld_safe]

user=mysql

tmpdir=/tmp

log-error=/usr/local/mysql/data/error.log

pid-file=/usr/local/mysql/data/mysql.pid

 

#

# include all files from the config directory

#

!includedir /etc/my.cnf.d

 

5)测试mysql服务

/usr/local/mysql/support-files/mysql.server start

 

6)创建mysql 软连接

[root@localhost /]# ln -s /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

[root@localhost /]# ln -s /usr/local/mysql/bin/mysql /usr/bin/mysql

[root@localhost /]# service mysql restart

 

7)登录mysql，修改密码(密码为上面生成的临时密码)

 

8)登录mysql数据库 修改密码

mysql -u root -p

Enter password:

SET PASSWORD = PASSWORD('root');

 

9)修改mysql登录用户

use mysql;

 

update user set host='%' where user = 'root';

 

flush privileges;

 

常见问题：

（1）yum -y install numactl